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Papers in International Journals

                                                          (click on paper title for abstract)

188.  Electrochemical sensing performance of nitrogen rich zero- and two-dimensional carbon nanomaterials modified   

         electrodes towards purines catabolism

          Ajay Ajith and S.A. John

          Electrochimica Acta 426 (2022) 140830

187.  Cost-Effective Electrochemical Sensor for L-methionine Based on Graphitic Carbon Nitride Sheets Modified             

         Electrode.

          Ajay Ajith and S.A. John

          Electroanalysis (2022)

 

186.  Bioengineered magnetic graphene oxide microcomposites for bioremediation of chromium in ex situ - A novel   

         strategy for aggrandized recovery by electromagnetic gadgetry

          Manikka Kubendran Aravind, Jincymol Kappen, Eswaran Narayanamoorthi, Ashokkumar Sanjaykumar, Perumal   

          Varalakshmi, Thevasahayam Arockiadoss, S. A. John and Balasubramaniem Ashokkumar

          Environmental Pollution 308 (2022) 119675

185.  Three-Dimensional Coral-Like NiFe-Layered Double Hydroxides on Biomass-Derived Nitrogen-Doped Carbonized   

          Wood as a SensitiveProbe for Nonenzymatic Urea Determination

          Ameer  Farithkhan and S.A. John

          ACS Sustainable Chemistry & Engineering 10 (2022) 6952

 

184.  Probing the Interaction of Heavy and Transition Metal Ions with Silver Nanoparticles Decorated on Graphene

         Quantum Dots by Spectroscopic and Microscopic Methods

         J. Kappen, B. Sinduja and S.A. John

         Langmuir 38 (2022) 4442

183.  Performance of graphitic carbon nitride nanosheets derived from liquid and thermal exfoliations towards the

         electrochemical reduction of nitrobenzene

         A. Ajith and S. A. John

         New J. Chem. 46 (2022) 6446

182.  Quantitative removal of Hg(II) as Hg(0) using carbon cloths coated graphene quantum dots and their silver   

         nanoparticles composite and application of Hg(0) for the sensitive determination of nitrobenzene

        Jincymol K, M.K. Aravind, P. Varalakshmi, B. Ashokkumar and S.A. John 

         Colloids and Surfaces A 641 (2022) 1286542

 

181.   Morphology dependent electrocatalytic activity of copper based porous organic frameworks via diverse  chain   

          length of linkers and counterions of metal precursor

          E. Narayanamoorthi, P. Arul, N.S.K. Gowthaman and S.A. John

          Electrochimica Acta 409 (2022)  139994

180.  Catechol 1,2-Dioxygenase From Paracoccus sp. MKU1—A Greener and Cleaner Bio-Machinery for cis, cis-Muconic

         Acid Production by Recombinant E. coli

         Manikka Kubendran Aravind, , Perumal Varalakshmi, , Swamidoss Abraham John and Balasubramaniem                                     

          Ashokkumar

         Frontiers in Bioengineering and Biotechnology (2021)

179.    Systematic Study on Morphological, Electrochemical Impedance and Electrocatalytic Activity of Graphitic Carbon Nitride Modified

           on Glassy Carbon Substrate from Sequential Exfoliation in Water

           Veeramani Mangala Gowri, Ajay Ajith and S.A. John 

           Lagmuir  37 (2021) 10538

178.   Fabrication of bulk, nanosheets and quantum dots of graphitic carbon nitride on electrodes: Morphology

           dependent electrocatalytic activity

          Veeramani Mangala Gowri and S.A. John 

           Journal of Electroanalytical Chemistry 895 (2021) 115474

177.  Chain-like 2-amino-4-thiazoleaceticacid tethered AuNPs as colorimetric and spectrophotometric probe for organophosphate

          pesticide in water and fruit samples

          C. Loganathan, N.S.K. Gowthaman and S.A. John 

          Microchemical Journal 168 (2021) 106495

176.  Unusual reactivity of graphene quantum dot-wrapped silver nanoparticles with Hg(II): Spontaneous growth of Hg flowers and their

         electrocatalytic activity

          Jincymol K., B. Sinduja and S.A. John 

          Inorganic Chemistry 60 (2021) 8210

175.  Formation of mercury droplets at ambient conditions through the interaction of Hg(II) with graphene quantum dots

          Jincymol K. and S.A. John 

          Inorganic Chemistry 60 (2021) 7843

174.  A highly selective turn-on fluorescent chemosensor for detecting zinc ions in living cells using symmetrical pyrene system

          B. Kirthika Rani and S.A. John 

          J. Photochemistry and Photobiology A 418 (2021) 113372

173.  Tunable electrochemical behavior of dicarboxylic acids anchored Co-MOF: Sensitive determination of rutin in pharmaceutical   

          samples

          T. Sivam, N.S.K. Gowthaman,  H.N. Lim, Y. Andou, P. Arul , E. Narayanamoorthi and S.A. John 

          Colloids and Surfaces A 622 (2021) 126667

172.  Colorimetric and “turn-on” fluorescence detection of saccharin using silver nanoparticles-graphene oxide composite

         C. Loganathan, K. Muthukrishnan and S.A. John 

         Sensors and Actuators: B. Chemical 341 (2021) 129967

 

171.  Synthesis of homogeneously distributed gold nanoparticles built-in metal free organic framework: Electrochemical detection of riboflavin in               pharmaceutical and human fluids samples

         P. Arul, N.S.K. Gowthaman, E. Narayanamoorthi, S-T. Huang and S.A. John

        Journal of Electroanalytical Chemistry 887 (2021) 115143 

170.  Aluminium MOF fabricated electrochemical sensor for the ultra-sensitive disruptor bisphenol detection of hydroquinone in water samples

         S.S. Ming, N.S.K. Gowthaman,  H.N. Lim, P. Arul , E. Narayanamoorthi,  I. Ibrahim, H. Jaafar and S.A. John

         Journal of Electroanalytical Chemistry 883 (2021) 115067

169.  Electrocatalyst based on Ni-MOF intercalated with amino acidfunctionalized graphene nanoplatelets for the determination of endocrine                         disruptor bisphenol

         P. Arul , S-T. Huang,  N.S.K. Gowthaman,  G. Mani,  N. Jeromiyas,  S. Shankar and S.A. John

         Analytica Chimica Acta 1150 (2021) 338228

168.  Urease-free Ni-microwires intercalated Co-ZIF electrocatalyst for rapid detection of urea in human fluid and milk samples in diverse electrolytes

         P. Arul,   N. S. K. Gowthaman, S.A. John  and  S-T. Huang

         Materials Chemistry Frontiers 5 (2021) 1942

167.  Fabrication of electrically conducting graphitic carbon nitride film on glassy carbon electrode with the aid of amine groups for the               

         determination of an organic pollutant

          V. Mangala Gowri and S.A. John

          Journal of Electroanalytical Chemistry 879 (2020) 114787

166.   Fabrication of Low-Cost Sustainable Electrocatalyst: A Diagnostic Tool for Multifunctional Disorders in Human Fluids

          B. Sinduja, N.S.K. Gowthaman and S.A. John

          Journal of Materials Chemistry B 8 (2020) 9502.

165.   Bioengineered graphene oxide microcomposites containing metabolically versatile paracoccus sp. MKU1 for enhanced catechol degradation

          M.K. Aravind, Jincymol K, P. Varalakshmi, S.A. John and B. Ashokkumar

          ACS Omega 5 (2020) 16752.

164.   Tunable electrochemical synthesis of 3D nucleated microparticles like Cu-BTC MOF-carbon nanotubes composite: Enzyme free ultrasensitive

          determination of glucose in a complex biological fluid

          P. Arul, N.S.K. Gowthaman, S.A. John and M. Tominaga

          Electrochimica Acta 354 (2020) 136673.

163.   Ultrasonic assisted synthesis of size-controlled Cu-metal–organic framework decorated graphene oxide composite: Sustainable 

          electrocatalyst for the trace-level determination of nitrite in environmental water samples

          P. Arul, N.S.K. Gowthaman, S.A. John and H.N. Lim

          ACS Omega 24 (2020) 14253.

162.   Hydroxyl rich graphene quantum dots for the determination of Hg(II) in the presence large concentration of major interferents and in living                  cells

          Jincymol K., M.K. Aravind, P. Varalakshmi, B. Ashokkumar and S.A. John

          Microchemical Journal 157 (2020) 104915.

161.    Covalent organic frame work film as an effective electrocatalyst for the simultaneous determination of dihydroxybenzene isomers in water                   samples

           P. Arul, E. Narayanamoorthi and S.A. John

           Sensors and Actuators B 313 (2020) 128033.

160.    Negative potential induced growth of surfactant-free CuO nanostructures on Al-C substrate: A dual in-line sensor for biomarkers of diabetes

           and oxidative stress

           N.S.K. Gowthaman, P. Arul, H.N. Lim and S.A. John

           ACS Sustainable Chemistry & Engineering 8 (2020) 2651.

 

159.    Selective receptor for Fe(III) ion with a fluorescence-ON pyrene motif in semi-aqueous solution

           B. Kirthika Rani and S.A. John

           Journal of Photochemistry & Photobiology A 392 (2020) 112426.

158.    Study on the interactions between graphene quantum dots and Hg(II): Unraveling the origin of photoluminescence quenching of graphene       

           quantum dots by Hg(II)

           Jincymol K., S. Ponkarpagam and S.A. John

           Colloids and Surfaces A 591 (2020) 124551.

157.    Leaching of AuNPs from the surface of GO: Sensitive turn on fluorescence detection of toxic preservative

           C. Loganathan, E. Narayanamoorthi and S.A. John

           Food Chemistry 309 (2020) 125751.

156.    Free-standing Au-Ag nanoparticles on carbon cloth: A non-enzymatic flexible electrochemical sensor for the biomarker of oxidative stress

           N.S.K. Gowthaman, P. Arul, J.J. Shim and S.A. John

           Applied Surface Science 495 (2019) 143550.

155.    Hetero atoms doped carbon dots modified electrodes for the sensitive and selective determination of phenolic anti-oxidant in coconut oil

           R. Karthikeyan, D. James Nelson, Ajay Ajith and S.A. John

           Journal of Electroanalytical Chemistry 848 (2019) 113297.

154.    Non-enzymatic determination of purine nucleotides using a carbon dot modified glassy carbon electrode

           R. Karthikeyan, D. James Nelson and S.A. John

           Analytical Methods 11 (2019) 3866.

153.    Organic solvent free in situ growth of flower like Co-ZIF microstructures on nickel foam for glucose sensing and supercapacitor applications

           P. Arul and S.A. John

           Electrochimica Acta 306 (2019) 254.

 

152.    Carbon dots stabilized silver–lipid nano hybrids for sensitive label free DNA detection

           K.P. Divya, R. Karthikeyan, B. Sinduja, AA. Grace, S.A. John, J.H. Hahn, V. Dharuman

           Biosensors and Bioelectronics  133 (2019) 48.

 

151.    Water-soluble MoS2 quantum dots as effective fluorescence probe for the determination of bilirubin in human fluids

           K. Shanmugaraj and S.A. John

           Spectrochimica Acta A 215 (2019) 290.

 

150.    Silver nanoparticles capped with carbon dots as a fluorescent probe for the highly sensitive “off–on” sensing of sulfide ions in water

           B. Sinduja and S.A. John

           Analytical and Bioanalytical Chemistry,  411 (2019) 2597.

 

149.    Highly selective naked eye detection of vitamin B1 in the presence of other vitamins using graphene quantum dots capped gold nanoparticles

           B. Sinduja and S.A. John

           New Journal of Chemistry, 43 (2019) 2111.

 

148.    Real time detection of adenosine and theophylline in urine and blood samples using graphene modified electrode

           S. Kesavan, N.S.K. Gowthaman, S. Alwarappan and S.A. John

           Sensors and Actuators B: Chemical, 278 (2019) 46.

 

147.    Ultrasensitive and selective hydrazine determination in water samples using Ag-Cu heterostructures grown indium tin oxide electrode by

           environmentally benign methods

           N.S.K. Gowthaman, S. Shankar  and S.A. John

           ACS Sustainable Chemistry & Engineering 6 (2018) 17302.

 

146.    Size controlled synthesis of Ni-MOF using polyvinylpyrrolidone: New electrode material for the trace level determination of nitrobenzene

            P. Arul and S.A. John

            Journal of Electroanalytical Chemistry 829 (2018) 168.

 

145.    Nitrogen-Doped Graphene Quantum Dot-Combined Sodium 10-Amino-2-methoxyundecanoate: Studies of Proinflammatory Gene

           Expression and Live Cell Imaging

 

           R.S. Kumar, G. Shakambari, B. Ashokkumar, D.J. Nelson, S.A. John and P. Varalakshmi

           ACS Omega, 3 (2018) 11982

 

144.    Synthesis of albumin capped gold nanoparticles and their direct attachment on glassy carbon electrode for the determination of nitrite ion

           S. Shankar, N.S.K. Gowthaman and S.A. John

           Journal of Electroanalytical Chemistry 828 (2018) 33.

 

143.    Displacement reduction routed Au-Pt bimetallic nanoparticles: A highly durable electrocatalyst for methanol oxidation and oxygen reduction

           N.S.K. Gowthaman, B. Sinduja, S. Shankar and S.A. John

           RSC Sustainable Energy & Fuels 2 (2018) 1588.

 

142.    Inner filter effect based selective detection of picric acid in aqueous solution using green luminescent copper nanoclusters

           K. Shanmugaraj and S.A. John

           New Journal of Chemistry 42 (2018) 7223.

 

141.    Selective and sensitive determination of antidote of heparin using Ag-GQDs by optical methods

           B. Sinduja, N.S.K. Gowthaman and S.A. John

           Analytical Methods 10 (2018) 1999.

 

140.    Substrate catalyzed formation of Au-Cu bimetallic nanoparticles as electrocatalyst for the reduction of dioxygen and hydrogen peroxide

           N.S.K. Gowthaman, S. Shankar and S.A. John

           Journal of Electroanalytical Chemistry 812 (2018) 37.

 

139.    Sensitive determination of rutin by spectrofluorimetry using carbon dots synthesized from a non-essential amino acid

           B. Sinduja and S.A. John

           Spectrochimica Acta A 193 (2018) 486.

 

138.    Fluorogenic mercury ion sensor based on pyrene-amino mercapto thiadiazole unit

           B. Kirthika Rani and S.A. John

           Journal of Hazardous Materials 343 (2018) 98.

 

137.    Pyrene-antipyrine based highly selective and sensitive turn-on fluorescent sensor for Th(IV)

           B. Kirthika Rani and S.A. John

           New Journal of Chemistry 41 (2017) 12131.

 

136.    Simultaneous growth of spherical, bipyramidal and wire-like gold nanostructures in solid and solution phases: SERS and electrocatalytic

            applications

            N.S.K. Gowthaman and S.A. John

            CrystEngComm 19 (2017) 5369.

 

135.     Electrodeposition of CuO from Cu-MOF on glassy carbon electrode: A non-enzymatic sensor for glucose

            P. Arul and S.A. John

            Journal of Electroanalytical Chemistry 799 (2017) 61.

 

134.     Fast growth of Au-Pt bimetallic nanoparticles on SWCNTs: Composition dependent electrocatalytic activity towards glucose and                                    hydrogen peroxide

            N.S.K. Gowthaman, S.A. John and M. Tominaga

            Journal of Electroanalytical Chemistry 798 (2017) 24.

 

133.     Silver nanoparticles built-in zinc metal organic framework modified electrode for the selective non-enzymatic determination of H2O2

            P. Arul and S.A. John

            Electrochimica Acta 235 (2017) 680.

 

132.     Ultrasensitive optical sensor for hydrogen peroxide using silver nanoparticles synthesized at room temperature by GQDs

            B. Sinduja and S.A. John

            Sensors and Actuators B: Chemical 247 (2017) 648.

 

131.     Fabrication of nitrogen-doped carbon dots for screening the purine metabolic disorder in human fluids

            N.S.K. Gowthaman, B. Sinduja, R. Karthikeyan, K. Rubini and S.A. John

            Biosensors and Bioelectronics 94 (2017) 30.

 

130.     Nitrogen-doped graphene as a robust scaffold for the homogenous deposition of copper nanostructures: A non-enzymatic disposable                          glucose sensor

            N.S.K. Gowthaman, M. Amal Raj and S.A. John

            ACS Sustainable Chemistry & Engineering 5 (2017) 1648.

 

129.     Naked eye and spectrophotometric detection of chromogenic insecticide in aquaculture using amine functionalized gold nanoparticles in

            the presence of major interferents

            C. Loganathan and S.A. John

            Spectrochimica Acta A 173 (2017) 837.

 

128.     Non-enzymatic electrochemical sensing platform based on metal complex immobilized carbon nanotubes for glucose determination

            P.K. Sonkar, V. GanesanS.A. JohnD.K. Yadava and R. Guptaa

            RSC Advances 6 (2016) 107094.

 

127.     Fabrication of different copper nanostructures on indium-tin-oxide electrode: Shape dependent electrocatalytic activity

            N.S.K. Gowthaman and S.A. John

            CrystEngComm 18 (2016) 8696.

 

126.    Tuning the composition of gold–silver bimetallic nanoparticles for the electrochemical reduction of hydrogen peroxide and nitrobenzene

            N.S.K. Gowthaman, B. Sinduja and S.A. John

            RSC Advances 6 (2016) 63433.

 

125.     Novel approach to fabricate stable graphene layers on electrode surfaces using simultaneous electroreduction of diazonium cations                            and graphene oxide

            S. Kesavan and S.A. John

            RSC Advances 6 (2016) 62876.

 

124.    Sensitive determination of tannic acid using blue luminescent graphene quantum dots as fluorophore

            B. Sinduja and S.A. John

            RSC Advances 6 (2016) 59900.

 

123.     Highly sensitive interference-free electrochemical determination of pyridoxine at graphene modified electrode: Importance in                                          Parkinson and Asthma treatments

            M. Amal Raj, N.S.K. Gowthaman and S.A. John

            J. Colloid and Interface Science 476 (2016) 171.

 

122.    A novel pyrene based fluorescent probe for selective detection of cysteine in presence of other bio-thiols in living cells

           B. Kirthika Rani and S.A. John

           Biosensors and Bioelectronics 83 (2016) 237.

 

121.    Monitoring isoniazid level in human fluids in the presence of theophylline using gold@platinum core@shell nanoparticles modified                               glassy carbon electrode

           N.S.K. Gowthaman, S. Kesavan and S.A. John

           Sensors and Actuators B: Chemical 230 (2016) 157.

 

120.    Formation of ERGO on melamine electrografted layers and its application towards the determination of methylxanthines

           S. Kesavan, M. Amal Raj and S.A. John

           Anal. Biochem. 496 (2016) 14.

 

119.    Stable determination of paracetamol in the presence of uric acid in human urine sample using melamine grafted graphene modified                               electrode

           S. Kesavan and S.A. John

           J. Electroanal. Chem. 760 (2016) 6.

 

118.    Electroless deposition of gold-platinum core@shell nanoparticles on glassy carbon electrode for non-enzymatic hydrogen peroxide                             sensing

           N.S.K. Gowthaman and S.A. John

           Journal of Chemical Sciences 128 (2016) 331.

 

117.    4-amino-6-hydroxy-2-mercaptopyrimidine capped gold nanoparticles as fluorophore for the ultrasensitive and selective determination                           of L-cysteine

           S. Shankar and S.A. John

           Sensors and Actuators B: Chemical 221 (2015) 1202. 

 

116.    Sensitive and highly selective determination of vitamin B1 in the presence of other vitamin B complexes using functionalized gold                                 nanoparticles as fluorophore

            S. Shankar and S.A. John

            RSC Advances 5 (2015) 49920.

 

115.      Functionalized multiwalled carbon nanotubes-nanostructured conducting polymer composite modified electrode for the sensitive

            determination of uricase inhibitor

            K. Rajalakshmi and S.A. John

            Electrochimica Acta 173 (2015) 506.

 

114.     Modification of a glassy carbon electrode with gold–platinum core–shell nanoparticles by electroless deposition and their      

            electrocatalytic activity

            N.S.K. Gowthaman and S.A. John

            RSC Advances 5 (2015) 42369.

 

113.     Highly sensitive determination of nitrite using FMWCNT-conducting polymer composite modified electrode

            K. Rajalakshmi and S.A. John

            Sensors and Actuators B: Chemical 215 (2015) 119.

 

112.     Selective determination of mefenamic acid in the presence of 1000-fold excess paracetamol and caffeine using a multiwalled

            carbon nanotube–polymer composite electrode

            K. Rajalakshmi and S.A. John

            Analytical Methods, 7 (2015) 3506.

 

111.     Chemical attachment of functionalized multiwalled carbon nanotubes on glassy carbon electrode for electrocatalytic application

            K. Rajalakshmi and S.A. John

            Electrochimica Acta 165 (2015) 268.

 

110.     Assembly of gold nanoparticles on graphene film via electroless deposition: Spontaneous reduction of Au3+ ions by graphene film

            M. Amal Raj and S.A. John

            RSC Advances 5 (2015) 4964.

 

109.     Graphene and their nanocomposite materials based electrochemical sensor platform for dopamine

            A. Pandikumar,* G.T.S. How, T.P. See, F.S. Omar, S. Jayabal, K.Z. Kamali, N.Yusoff, A. Jamil, R. Ramaraj, S.A. John,

            H.N. Limbe and N.M. Huang*

            RSC Advances 4 (2014) 63296.

 

108.     Sensitive and selective determination of l-tryptophan at physiological pH using functionalized multiwalled carbon nanotubes-nanostructured

            conducting polymer composite modified electrode

            K. Rajalakshmi and S.A. John

            J. Electroanal. Chem. 734 (2014) 31.

 

107.     Simultaneous determination of neurotransmitters and neuroprotector in human blood serum and urine samples using diazonium

            grafted gold nanoparticles film electrode

            S. Kesavan and S.A. John

            Analytical Methods 6 (2014) 9022.

 

106.     Fabrication of aminotriazole grafted gold nanoparticles films on glassy carbon electrode and its application towards the simultaneous

            determination of theophylline and uric acid

            S. Kesavan and S.A. John

            Sensors and Actuators B: Chemical, 215 (2014) 352.

 

105.     Economically viable sensitive and selective luminescent sensor for the determination of Au(III) in environmental samples

            N. Vasimalai, K. Rajalakshmi and S.A. John

            RSC Adv., 4 (2014) 38812.

 

104.     Formation of heteroaromatic diazonium grafted layers on gold nanoparticles and their electrocatalytic activity towards an importantpurine

            derivative

            S. Kesavan, A. Prabhakaran and S.A. John

            RSC Advances 4 (2014) 30896.

 

103.     Fast growth of gold nanorods on solid substrate using electrochemically deposited gold seeds

            M. Amal Raj and S.A. John

            Electrochemistry Communications 45 (2014) 27. 

 

102.     Synergistic effect of gold nanoparticles and amine functionalized cobalt porphyrin on electrochemical oxidation of hydrazine

            P. Muthukumar and S.A. John

            New Journal of Chemistry 38 (2014) 3473. 

           

101.     Efficient oxidation of hydrazine using amine functionalized cobalt and nickel porphyrin modified electrodes

            P. Muthukumar and S.A. John

            J. Solid State Electrochemistry 18 (2014) 2393. 

 

100.     Spontaneous grafting: A novel approach to graft diazonium cations on gold nanoparticles in aqueous medium and their slf-assembly on

            electrodes

            S. Kesavan and S.A. John

            J. Colloid and Interface Science 428 (2014) 84.

 

99.       Gold nanoparticles decorated on cobalt porphyrin modified glassy carbon electrode for the sensitive determination of nitrite ion

            P. Muthukumar and S.A. John

            J. Colloid and Interface Science 421 (2014) 78.

 

98.       Graphene layers modified glassy carbon electrode for the determination of norepinephrine and theophylline in pharmaceutical formulations

            M. Amal Raj and S.A. John

            Analytical Methods 6 (2014) 2181.

 

97.       Potentiodynamic formation of gold nanoparticles film on glassy carbon electrode using aminophenyl diazonium cations grafted

            gold nanoparticles: Determination of histamine H2 receptor antagonist

            S. Kesavan and S.A. John

            Electrochimica Acta 119 (2014) 214.

 

96.       Electrochemical determination of xanthine oxidase inhibitor drug in urate lowering therapy using graphene nanosheets modified electrode

            M. Amal Raj and S.A. John

            Electrochimica Acta 117 (2014) 360.

 

95.       Self-assembled monolayer of 2,9,16,23-tetrahydroxythiophenyl-phthalocyanatocobalt(II) on gold electrode and its electrocatalytic activity

            towards dioxygen reduction

            A. John Jeevagan, S.A. John

            Journal of Electroanalytical Chemistry 713 (2014) 214.

 

94.       Effect of amine substituted at ortho and para positions on the electrochemical and electrocatalytic properties of cobalt porphyrins

            self-assembled on glassy carbon surface

            Muthukumar and S.A. John

            Electrochimica Acta 115 (2014) 197.

 

93.       Off-on and on-off chemosensors for ultratrace mercury(II) and copper(II) using functionalized thiazole and cadmium sulfide

            nanoparticles fluorophores

            N. Vasimalai and S.A. John

            Sensors and Actuators B: Chemical 190 (2014) 800

 

92.       A  turn-on highly selective and ultrasensitive determination of copper(II) in aqueous  medium using folic acid capped gold nanoparticles as

            probe

            N. Vasimalai and S.A. John

            Nanotechnology 24 (2013) 505503.

 

91.       Aggregation and de-aggregation of gold nanoparticles induced by polyionic drugs: Spectrofluorimetric determination of

            picogram protamine and heparin drugs in the presence of 1000-fold major interferences

            N. Vasimalai and S.A. John

            Journal of Materials Chemistry B 1 (2013) 5620.

 

90.      Electrochemical marker for metastatic malignant melanoma based on the determination of L-dopa/L-tyrosine ratio

           S.B. Revin and S.A. John

           Sensors and Actuators B: Chemical 188 (2013) 1026.

 

89.      Fabrication of electrochemically reduced graphene oxide films on glassy carbon electrode by self-assembly method and their electrocatalytic

           application

           M. Amal Raj and S.A. John

           J. Phys. Chem. C 117 (2013) 4326 (Impact Factor: 4.805).

 

88.      Protein protected gold nanoparticles as fluorophore for the highly selective and ultrasensitive determination of bisphenol A in

           plastic samples

           N. Vasimalai and S.A. John

           Analytical Methods, 5 (2013) 5515.

 

87.      Simultaneous determination of uric acid, xanthine, hypoxanthine and caffeine in human blood serum and urine samples

           using electrochemically reduced graphene oxide modified electrode

            M. Amal Raj and S.A. John

            Analytica Chimica Acta  771 (2013) 14.

 

86.       Biopolymer capped silver nanoparticles as fluorophore for ultrasensitive and selective determination of malathion

            N. Vasimalai and S.A. John

            Talanta 115 (2013) 24 (Impact Factor: 3.794).

 

85.       Micromolar Hg(II) induced the morphology of gold nanoparticles: A novel luminescent sensor for femtomolar Hg(II) using

           triazole capped gold nanoparticles fluorophore

            N. Vasimalai and S.A. John

            Journal of Materials Chemistry A, 1 (2013) 4475.

 

84.       Electrochemical determination of guanosine 5'-monophosphate using the electropolymerized film of non-peripheral amine

           substituted nickel(II) phthalocyanine modified electrode

            A. John Jeevagan and S.A. John

            Electrochimica Acta 95 (2013) 246.

 

83.       Synthesis of non-peripheral amine substituted nickel(II) phthalocyanine capped gold nanoparticles and their immobilization

            on electrode for the electrocatalytic oxidation of hydrazine

            A. John Jeevagan and S.A. John

            RSC Advances 3 (2013) 2256-2264.

 

82.      Growth of gold nanorods in solution and on ITO and Au substrates using non-peripheral amine functionalized nickel(II) phthalocyanine

            A. John Jeevagan, M. Amal Raj and S.A. John

            RSC Advances  3 (2013) 870-878.

 

81.       Picomolar melamine enhanced the fluorescence of gold nanoparticles: Spectrofluorimetric determination of melamine in milk and 

            infant formulas using functionalized triazole capped gold nanoparticles

            N. Vasimalai and S.A. John

            Biosensors and Bioelectronics, 42 (2013) 267-272.

 

80.       Synthesis, characterization and modification of functionalized pyrimidine stabilized gold nanoparticles on ITO electrode for the

            determination of tannic acid

            M. Amal Raj, S.B. Revin and S.A. John

            Bioelectrochemistry 89 (2013) 1.

 

79.       Fabrication of optochemical and electrochemical sensors using thin films of porphyrin and phthalocyanine derivatives

            Palanisamy Kalimuthu, A. Sivanesan and S.A. John

            J. Chem. Sci. 124 (2012) 1315.

 

78.       Optochemical ammonia gas sensing properties of meso-substituted porphyrin derivatives immobilized Nafion film on glass slide

            P. Muthukumar and S.A. John

           Sensors and Actuators B: Chemical, 174 (2012) 74.

 

77.      Fabrication, characterization and application of grafting based gold nanoparticles electrode for the selective determination                                             of important neurotransmitter

           S. Kesavan, S.B. Revin and S.A. John

           J. Mater. Chem. 22 (2012) 17560.

 

76.       Mercaptothiadiazole capped gold nanoparticles as fluorophore for the determination of nanomolar mercury (II) in aqueous solution

            in the presence of 50,000-fold major interferents

            N. Vasimalai and S.A. John

            Analyst 137 (2012) 3349.

 

75.       Electrochemical determination of caffeine in the presence of paracetamol using a self-assembled monolayer of non-peripheral

            amine substituted copper(II) phthalocyanine

            A. John Jeevagan and S.A. John

            Electrochim. Acta 77 (2012) 137.

 

74.       Highly sensitive determination of uric acid in the presence of major interferents using a conducting polymer film modified electrode

            S.B. Revin and S.A. John

            Bioelectrochemistry 88 (2012) 22.

 

73.       Electrochemical sensor for neurotransmitters at physiological pH using a heterocyclic conducting polymer modified electrode

            S.B. Revin and S.A. John

            Analyst 137 (2012) 209.

 

72.       Electrochemical sensor for guanine using a self-assembled monolayer of 1,8,15,22-tetraaminophthalocyanatonickel(II) on

            glassy carbon electrode

            A. John Jeevagan and S.A. John

            Analytical Biochemistry, 424 (2012) 21.

           

71.       Ultrasensitive fluorescence-quenched chemosensor for Hg(II) in aqueous solution based on mercaptothiadiazole capped silver nanoparticles

            N. Vasimalai and S.A. John

            Journal of Hazardous Materials, 213-214 (2012) 193.

 

70.       Selective determination of inosine in the presence of uric acid and hypoxanthine using modified electrode

            S.B. Revin and S.A. John   [Analytical Biochemistry 421 (2012) 278]

 

69.       Simultaneous determination of vitamins B2, B9 and C using a heterocyclic conducting polymer modified electrode

            S.B. Revin and S.A. John   [Electrochim. Acta 75 (2012) 35]

 

68.       Selective and sensitive electrochemical sensor for L-methionine at physiological pH using functionalized triazole polymer film....

            S.B. Revin and S.A. John  [Electroanalysis 24 (2012) 1277]

 

67.       Selective determination of tyrosine in the presence of ascorbic and uric acids at physiological pH using the electropolymerized film of...

            S.B. Revin and S.A. John  [Sensors and Actuators B: Chemical 161 (2012) 1059]

 

66.       Electrochemical determination of L-methionine using the electropolymerized film of non-peripheral amine substituted Cu(II) phthalocyanine...

            A. John Jeevagan and S.A. John   [Bioelectrochemistry 85 (2012) 50]

 

65.       Simultaneous determination of two important dopamine metabolites at physiological pH by voltammetry

            S.B. Revin and S.A. John   [Analytical Methods, 4 (2012) 348]

 

64.       Ultrasensitive determination of cysteine using gold-5-amino-2-mercapto-1,3,4-thiadiazole core-shell nanoparticles film modified electrode        

            P. Kannan and S.A. John   [Biosensors and Bioelectronics 30 (2011) 276] 

          

63.       Electropolymerization of 3-amino-5-mercapto-1,2,4-triazole on glassy carbon electrode and its electrocatalytic activity towards uric acid

            S.B.Revin and S.A. John   [Electrochim. Acta 56 (2011) 8934]

 

62.       Spectrofluorimetric determination of picogram level Pb(II) using a dimercaptothiadiazole fluorophore

            N. Vasimalai and S.A. John  [Spectrochim. Acta Part A 82 (2011) 153]

 

61.       Fabrication of conducting polymer-gold nanoparticles film on electrodes using monolayer protected gold nanoparticles and its...

            P. Kannan  and S.A. John   [Electrochim. Acta 56 (2011) 7029]

60.       Selective determination of 3,4-dihydroxyphenylacetic acid in the presence of ascorbic acid using 4-(dimethylamino)pyridine capped...

            M. Amal Raj, B. Revin and S.A. John   [Colloids and Surfaces B 87 (2011) 353]

 

59.       Highly sensitive detection of HCl gas using a thin film of meso-tetra(4-pyridyl) porphyrin coated glass slide by optochemical method

            P. Muthukumar and S.A. John   [Sensors and Actuators B 159 (2011) 238]

 

58.       Ultrasensitive and selective spectrofluorimetric determination of Hg(II) using a dimercaptothiadiazole fluorophore          

            N. Vasimalai and S.A. John   [J. Luminescence 131 (2011) 2636]

 

57.       Synthesis, characterization and electrocatalytic activity of fused gold nanoparticles

            P. Kannan and S.A. John   [J. Nanosci. Nanotech. 11 (2011) 2142]

 

56.       Selective determination of norepinephrine in the presence of ascorbic and uric acids using an ultrathin film modified electrode

            Palraj Kalimuthu and S.A. John   [Electrochim. Acta 56 (2011) 2428]

 

55.       Selective determination of 3,4-dihydroxyphenylacetic  acid in the presence of ascorbic and uric acids using polymer film modified electrode

            Palraj Kalimuthu and S.A. John   [J. Chem. Sci. 143 (2011) 349]

 

54.       Direct growth of gold nanorods on gold and indium tin oxide surfaces: Spectral, electrochemical and electrocatalytic studies

            P. Kannan, S. Sampath and S.A. John   [J. Phys. Chem. C 114 (2010) 21114]

 

53.       In-situ Fabrication of meso-Tetrakis(4-sulfonatophenyl)porphyrin Nanostructures with Excitonic Absorption on Glass Substrate

            Palanisamy Kalimuthu and S.A. John   [ACS Applied Materials and Interfaces, 2 (2010) 3348]

 

52.       Selective determination of homocysteine at physiological pH using nanostructured film of aminothiadiazole modified electrode

            Palraj Kalimuthu and S.A. John  [Bioelectrochemistry  79 (2010) 168]

 

51.       Studies on ligand exchange reaction of functionalized mercaptothiadiazole compounds onto citrate capped gold nanoparticles

            Palraj Kalimuthu and S.A. John   [Mat. Chem.  Phys. 122 (2010) 380]

 

50.       Selective electrochemical determination of paracetamol using nanostructured film of functionalized thiadiazole modified electrode

            Palraj Kalimuthu and S.A. John   [Electroanalysis 22 (2010) 303]

                     

49.       Simultaneous determination of ascorbic acid, dopamine, uric acid and xanthine using a nanostructured polymer film modified electrode

            Palraj Kalimuthu and S.A. John  [Talanta 80 (2010) 1686]

                                                          

48.       Highly sensitive electrochemical determination of nitric oxide using fused spherical gold nanoparticles modified ITO electrode

            P. Kannan and S.A. John  [Electrochim. Acta 55 (2010) 3497]

           

47.       Highly sensitive determination of hydroxylamine using fused gold nanoparticles immobilized on sol–gel film modified gold electrode          

            P. Kannan and S.A. John   [Anal. Chim. Acta 663 (2010) 158]

 

46.       Highly Sensitive Electrochemical Sensor for Nitric Oxide Using the Self-Assembled Monolayer of  1,8,15,22- Tetraaminophthalocyanato-...

            A. Sivanesan and S.A. John   [Electroanalysis 22 (2010) 639]

 

45.       Nanostructured aggregates of meso-tetramesitylporphyrin on solid substrate

            Palanisamy Kalimuthu, S.A. John  [Langmuir 25 (2009) 12414]

                      

44.       Leaflike structured multilayer assembly of dimercaptothiadiazole on gold electrode

            Palraj Kalimuthu, Palanisamy Kalimuthu and S.A. John  [J. Phys. Chem. C 113 (2009) 10176]

                                               

43.       Selective electrochemical sensor for folic acid at physiological pH using ultrathin electropolymerized film of functionalized...

            Palraj Kalimuthu and S.A. John  [Biosensors and Bioelectronics 24 (2009) 3575]  

 

42.       Adsorption thermodynamics and kinetics study for the self-assembly of,8,15,22-tetraminophthalocyanatocobalt (II) on glassy...

            A. Sivanesan and S.A. John  [Electrochim. Acta 54 (2009) 7458]                               

 

41.       Nanostructured electropolymerized film of 5-amino-2-mercapto-1,3,4-thiadiazole on glassy carbon electrode for the selective...

            Palraj Kalimuthu and S.A. John   [Electrochem. Commun. 11 (2009) 367]

                                 

40.       Determination of nanomolar uric and ascorbic acids using enlarged gold nanoparticles modified electrode

            P. Kannan and S.A. John   [Anal. Biochem. 386 (2009) 65]

                                 

39.       Simultaneous determination of epinephrine, uric acid and xanthine in the presence of ascorbic acid using an ultrathin film of...

            Palraj Kalimuthu and S.A. John  [Anal. Chim. Acta 647 (2009) 97]

                                             

38.       Short time preparation and electrochemical properties of a single layer of tetraoctyl-ammonium bromide capped Au nanoparticles... 

            S.A. John and T. Sagara  [J. Electroanal. Chem. 633 (2009) 135]

                                 

37.      Electropolymerized film of functionalized thiadiazole on glassy carbon electrode for the simultaneous determination of...

           Palraj Kalimuthu and S.A. John   [Bioelectrochemistry 77 (2009) 13]

 

36.       Modification of electrodes with nanostructured functionalized thiadiazole polymer film and its application to the determination...

            Palraj Kalimuthu and S.A. John  [Electrochim. Acta 55 (2009) 183]

         

35.       Highly sensitive and selective amperometric determination of nitrite using electropolymerized film of functionalized...

            Palraj Kalimuthu and S.A. John  [Electrochem. Commun. 11 (2009) 1065]

 

34.       Simultaneous determination of paracetamol and ascorbic acid using tetrabutylammonium capped gold nanoparticles immobilized....

            S.A. Nair, S.A. John and T. Sagara  [Electrochim. Acta 55 (2009) 183]

         

33.       Electrochemical and spectral studies of self-assembled monolayer of 1,8,15,22-tetraminophthalocyanatocobalt (II) on indium tin oxide...

            A. Sivanesan and S.A. John   [J. Electroanal. Chem. 634 (2009) 64]

 

32.       Optochemical sensing of hydrogen chloride gas using meso-tetramesityl-porphyrin deposited glass plate

            Palanisamy Kalimuthu and S.A. John   [Anal. Chim. Acta  627 (2008) 247]

 

31.       Selective electrochemical epinephrine sensor using self-assembled monomolecular film   of 1,8,15,22-tetraaminophthalocyanatonickel(II)       

            A. Sivanesan and S.A. John  [Electroanalysis 21 (2008) 2340]

 

30.       Amino group positions dependent morphology and coverage of electropolymerized metallophthalocyanine (M=Ni and Co)....

            A. Sivanesan and S.A. John   [Electrochim. Acta  53 (2008) 6629]  

 

29.       Synthesis of mercaptothiadiazole functionalized gold nanoparticles and their self-assembly on Au substrates

            P. Kannan and S.A. John   [Nanotechnology  19 (2008) 085602]   

         

28.       Amino group position dependent orientation of self-assembled monomolecular films tetraaminophthalocyanatocobalt(II) on Au surfaces

            A. Sivanesan and S.A. John   [Langmuir 24 (2008) 2186]

 

27.       Size dependent electrocatalytic activity of gold nanoparticles immobilized onto three dimensional sol-gel network

            Palraj Kalimuthu and S.A. John   [J. Electroanal. Chem. 617 (2008) 164]

 

26.       Charge-transfer interaction of aromatic thiols with 2,3-dichloro-5,6-dicyano-p-benzoquinone: spectral and quantum....

            Palanisamy Kalimuthu, A. Sivanesan and S.A. John   [J. Phys. Chem. A 111 (2007) 12086]      

         

25.       Determination of L-dopa using electropolymerized 3,3¢,3¢¢,3¢¢¢-tetraaminophthalocyanatonickel(II) film on glassy carbon electrode

            A. Sivanesan and S.A. John   [Biosensors and Bioelectronics  23 (2007) 708]

24.       Electrocatalytic oxidation of ascorbic acid using a single layer of gold nanoparticles immobilized on 1,6-hexanedithiol....

            A. Sivanesan, P. Kannan and S.A. John   [Electrochim. Acta  52 (2007) 8118]          

 

23.       Uric acid determination in the presence of ascorbic acid using self-assembled sub-monolayer of dimercaptothiadiazole-.....

            Palraj Kalimuthu, D. Suresh, S.A. John   [Anal. Biochem. 357 (2006) 188]

 

22.       Solvent dependent dimercaptothiadiazole monolayers on gold electrode for the   simultaneous determination of uric acid....     

            Palraj Kalimuthu, S.A. John  [Electrochem. Commun. 7 (2005) 1271]

21.       Simultaneous determination of uric acid and ascorbic acid using glassy carbon electrodes in acetate buffer solution                                                        S.A. John  [J. Electroanal. Chem. 579 (2005) 249]

 

20.      Microenvironmental Effects on the Electrochemical and Photoelectrochemical Properties of Thionine Loaded Nafion Films

          S.A. John and R. Ramaraj  [J. Electroanal. Chem. 561 (2004) 191]

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