Patents

1. Pavan Kumar Mandali, Subramanian Nellaiappan, and Uma Maheswari Krishnan*, 2021. Squramide Boronic acid derivation and its application for electrochemical sensing of glycated hemoglobin HbA1c. Indian Patent filed (Application No: 202141055245).

Publications

1. Nellaiappan, S., Vishnu, N., Manoj, D., Kanagaraj, T., Selvaraj, M. and Assiri, M.A., 2025. Electrochemical flow injection analysis platforms for biomedical applications–Progress and prospects. Analytical Biochemistry, p.115795. https://doi.org/10.1016/j.ab.2025.115795
2. Kumar, D.R., Manoj, D., Rosenkranz, A., Al Mahmud, A., Shim, J.J., Mary, S.P. and Nellaiappan, S., 2023. Micro-structured growth of 1, 2, 4-triazole by electro-polymerization for highly selective detection of gallic acid and uric acid. Microchemical Journal, 195, p.109375. https://doi.org/10.1016/j.microc.2023.109375
3. Shanmugam, R., Aniruthan, S., Yamunadevi, V., Nellaiappan, S., Amali, A.J. and Suresh, D., 2023. Co-N/Zn@ NPC derived from bimetallic zeolitic imidazolate frameworks: A dual mode simultaneous electrochemical sensor for uric acid and ascorbic acid. Surfaces and Interfaces, 40, p.103103. https://doi.org/10.1016/j.surfin.2023.103103
4. Sushmitha, J. and Nellaiappan, S., 2023. Electrochemical Sensing of Amoxicillin Drug-Assisted Uropathogenic E. coli Bacteria Using Gold Nanostructures—A Preliminary Study. Electrochem, 4(2), pp.291-300. https://doi.org/10.3390/electrochem4020020
5. Mishra, S.S., Kumbhakar, P., Nellaiappan, S., Katiyar, N.K., Tromer, R., Woellner, C.F., Galvao, D.S., Tiwary, C.S., Ghosh, C., Dasgupta, A. and Biswas, K., 2023. Two‐Dimensional Multicomponent Quasicrystal as Bifunctional Electrocatalysts for Alkaline Oxygen and Hydrogen Evolution Reactions. Energy Technology, 11(2), p.2200860. https://doi.org/10.1002/ente.202200860
6. Nellaiappan, S., Mandali, P.K., Prabakaran, A. and Krishnan, U.M., 2021. Electrochemical immunosensors for quantification of procalcitonin: Progress and prospects. Chemosensors, 9(7), p.182. https://doi.org/10.3390/chemosensors9070182
7. Sethulakshmi, N., Nellaiappan, S., Pentyala, P., Sharma, M., Irusta, S., Deshpande, P.A. and Sharma, S., 2021. Nanocoral CuCo2S4 thiospinels: Oxygen evolution reaction via redox interaction of metal ions. Electrochimica Acta, 370, p.137701. https://doi.org/10.1016/j.electacta.2020.137701
8. Nellaiappan, S., Jhariya, N., Irusta, S. and Singhal, A., 2021. Platinum substituted Cobalt (II, III) Oxide: Interplay of tetrahedral Co (II) sites towards electrochemical oxygen evolution activity. Electrochimica Acta, 365, p.137234. https://doi.org/10.1016/j.electacta.2020.137234
9. Sharma, N., Bajpai, A., Yadav, P.K., Nellaiappan, S., Sharma, S., Tiwary, C.S. and Biswas, K., 2020. Green route for beneficiation of metallic materials from electronic waste for selective reduction of CO2. ACS Sustainable Chemistry & Engineering, 8(32), pp.12142-12150. https://doi.org/10.1021/acssuschemeng.0c03605
10. Nellaiappan, S., Katiyar, N.K., Kumar, R., Parui, A., Malviya, K.D., Pradeep, K.G., Singh, A.K., Sharma, S., Tiwary, C.S. and Biswas, K., 2020. High-entropy alloys as catalysts for the CO2 and CO reduction reactions: experimental realization. ACS catalysis, 10(6), pp.3658-3663. https://doi.org/10.1021/acscatal.9b04302
11. Katiyar, N.K., Nellaiappan, S., Kumar, R., Malviya, K.D., Pradeep, K.G., Singh, A.K., Sharma, S., Tiwary, C.S. and Biswas, K., 2020. Formic acid and methanol electro-oxidation and counter hydrogen production using nano high entropy catalyst. Materials Today Energy, 16, p.100393. https://doi.org/10.1016/j.mtener.2020.100393
12. Singh, R.P., Arora, P., Nellaiappan, S., Shivakumara, C., Irusta, S., Paliwal, M. and Sharma, S., 2019. Electrochemical insights into layered La2CuO4 perovskite: Active ionic copper for selective CO2 electroreduction at low overpotential. Electrochimica Acta, 326, p.134952. https://doi.org/10.1016/j.electacta.2019.134952
13. Nellaiappan, S., Kumar, R., Shivakumara, C., Irusta, S., Hachtel, J.A., Idrobo, J.C., Singh, A.K., Tiwary, C.S. and Sharma, S., 2019. Electroreduction of carbon dioxide into selective hydrocarbons at low overpotential using isomorphic atomic substitution in copper oxide. ACS Sustainable Chemistry & Engineering, 8(1), pp.179-189. https://doi.org/10.1021/acssuschemeng.9b05087
14. Baidya, T., Murayama, T., Nellaiappan, S., Katiyar, N.K., Bera, P., Safonova, O., Lin, M., Priolkar, K.R., Kundu, S., Srinivasa Rao, B. and Steiger, P., 2019. Ultra-low-temperature CO oxidation activity of octahedral site cobalt species in Co3O4 based catalysts: unravelling the origin of the unique catalytic property. The Journal of Physical Chemistry C, 123(32), pp.19557-19571. https://doi.org/10.1021/acs.jpcc.9b04136
15. Nellaiappan, S. and Sharma, S., 2019. Substitution of zinc (II) in nickel (II) oxide as proficient copper-free catalysts for selective CO2 electroreduction. ACS Applied Energy Materials, 2(5), pp.2998-3003. https://doi.org/10.1021/acsaem.9b00242
16. Nellaiappan, S. and Kumar, A.S., 2018. A bipotentiostat based separation-free method for simultaneous flow injection analysis of chromium (III) and (VI) species. Electrochimica Acta, 273, pp.248-256. https://doi.org/10.1016/j.electacta.2018.04.025
17. Nellaiappan, S., Pillai, K.C. and Kumar, A.S., 2018. Flow-injection analysis coupled with electrochemical detection of poisonous inorganic arsenic (III) species using a gold nanoparticle/carbon nanofiber/chitosan chemically modified carbon screen printed electrode in neutral pH solution. Analytical Methods, 10(7), pp.799-808.     https://doi.org/10.1039/C7AY02655B
18. Nellaiappan, S. and Kumar, A.S., 2018. Selective amperometric and flow injection analysis of 1, 2-dihydroxy benzene isomer in presence of 1, 3-and 1, 4-dihydroxy benzene isomers using palladium nanoparticles-chitosan modified ITO electrode. Sensors and Actuators B: Chemical, 254, pp.820-826. https://doi.org/10.1016/j.snb.2017.07.176
19. Nellaiappan, S., Kumar, A.S., Nisha, S. and Pillai, K.C., 2017. In-situ preparation of Au (111) oriented nanoparticles trapped carbon nanofiber-chitosan modified electrode for enhanced bifunctional electrocatalysis and sensing of formaldehyde and hydrogen peroxide in neutral pH solution. Electrochimica Acta, 249, pp.227-240. https://doi.org/10.1016/j.electacta.2017.07.154
20. Nellaiappan, S. and Kumar, A.S., 2017. Electrocatalytic oxidation and flow injection analysis of isoniazid drug using a gold nanoparticles decorated carbon nanofibers-chitosan modified carbon screen printed electrode in neutral pH. Journal of Electroanalytical Chemistry, 801, pp.171-178. https://doi.org/10.1016/j.jelechem.2017.07.049
21. Nellaiappan, S. and Kumar, A.S., 2017. Reductive cleavage of methyl orange under formation of a redox-active hydroquinone/polyaniline nanocomposite on an electrode modified with MWCNTs, and its application to flow injection analysis of ascorbic acid at low potential and neutral pH value. Microchimica Acta, 184, pp.3255-3264. https://doi.org/10.1007/s00604-017-2339-4
22. Gopal B, Muralidharan A, Bakthavatsalam R, Nellaiappan S, Kumar AS. Unusual observation of optical property of V5+ substituted BPO4 and its tunable redox features. Materials Research Bulletin. 2017 Jul 1;91:122-6. https://doi.org/10.1016/j.materresbull.2017.03.020
23. Kumar, A.S., Shanmugam, R., Nellaiappan, S. and Thangaraj, R., 2016. Tea quality assessment by analyzing key polyphenolic functional groups using flow injection analysis coupled with a dual electrochemical detector. Sensors and Actuators B: Chemical, 227, pp.352-361. https://doi.org/10.1016/j.snb.2015.12.072
24. Thangaraj, R., Nellaiappan, S., Sudhakaran, R. and Kumar, A.S., 2014. A flow injection analysis coupled dual electrochemical detector for selective and simultaneous detection of guanine and adenine. Electrochimica Acta, 123, pp.485-493. https://doi.org/10.1016/j.electacta.2014.01.066
25. Nellaiappan, S. and Kumar, A.S., 2013. Selective flow injection analysis of iodate in iodized table salts by riboflavin immobilized multiwalled carbon nanotubes chemically modified electrode. Electrochimica Acta, 109, pp.59-66. https://doi.org/10.1016/j.electacta.2013.07.076

National Journals & Conference Proceedings

1. Nellaiappan, S. and Kumar, A.S., 2015. Methyl orange dye immobilized multi-walled carbon nanotube modified electrode for a selective electrochemical sensing of ascorbic acid at potential. JOURNAL OF THE INDIAN CHEMICAL SOCIETY, 92(4), pp.481-484.

Book Chapters

1. Nellaiappan, S* and Randriamahazaka Hyacinthe, 2025. Future Approaches to Electrochemical Sensing of Neurotransmitters: Chapter 9 - Microfluidic Interdigitated Electrodes for Determination of Neurotransmitters, RSC volume 30 (under production)
2. Nellaiappan, S, K. S. Shalini Devi, Stalin Selvaraj, Uma Maheswari Krishnan* and Jatinder Vir Yakhmi, 2021. Advances in Hybrid Conducting Polymer Technology: Chapter 9- Chemical, Gas and Optical Sensors based on Conducting Polymers. Springer publisher pp. 159-200.
3. Nellaiappan, S and Uma Maheswari Krishnan*, 2021. Disposable Electrochemical Sensors for Healthcare Monitoring: Material Properties and Design, Chapter 14- Existing point-of-care diagnostics: Merits and Demerits. RSC, pp. 410-431.

Awards and Honors

1. Scientific High Level Visiting Fellowships-2024, University of Paris Cite, Paris, France
2. SERB International Research Experience-2023, University of Montreal, Canada
3. Global Research Award-2023, MITACS, University of Waterloo, Canada
4. Senior Research Fellow-2017, Council of Science and Industrial Research (CSIR), India