Metal-Free Electrochemical Dopamine Sensing Using a g-C3N4/Polymethyl Thymol Blue Nanohybrid

Sankar Sekar, Sejoon Lee*, Sutha Sadhasivam, Kumar Sangeetha Selvan, Saravanan Sekar, Youngmin Lee, Pugazhendi Ilanchezhiyan, Seung-Cheol Chang*, Ramalingam Manikandan*Biosensors 2026, 16, 124.
https://doi.org/10.3390/bios16020124

A smartphone-integrated electrochemical biosensor based on engineered laccase-mimicking nanozymes for epinephrine detection in metabolic stress

Sivaguru Jayaraman† , Thenmozhi Rajarathinam† , Jinyong Park† , Duwon Jung, Amir Humayun, Prabakar Kandasamy, Jang-Hee Yoon*, Jaewon Lee, Seung-Cheol Chang* J. Colloid Interface Sci.., 2026, 708, 139817.
https://doi.org/10.1016/j.jcis.2025.139817

Nanomaterial-Integrated Laser-Induced Graphene Electrochemical Sensors for Environmental Pollutant Detection

Ramalingam Manikandan† , Jinyong Park† , Hyeon-Geun Jang, Uma Aruljothi Mugunthan, Chang-Seok Kim, Bo-Sung Shin, Jang-Hee Yoon*, Seung-Cheol Chang*J. Environ. Chem. Eng.. 2026, 14, 120667.
https://doi.org/10.1016/j.jece.2025.120667

Magnetosome-Based Immunosensors for Foodborne Pathogen Detection

Sankar Sekar, Shiva Kumar Arumugasamy, Sejoon Lee*, Saravanan Sekar, Sutha Sadhasivam, Sekar Vaithilingam, Nandhakumar Srinivasan, Elangovan Krishnan, Seung-Cheol Chang*, Ramalingam Manikandan* Chemosensors, 2025, 13, 355.
https://doi.org/10.3390/chemosensors13090355

Rapid Microwave-Assisted Synthesis of CuSe Nanoparticles for High-Sensitivity Serotonin Biosensing in Serum

Sankar Sekar, Ramalingam Manikandan*, Shiva Kumar Arumugasamy, Saravanan Sekar, Youngmin Lee, Seung-Cheol Chang*, Sejoon Lee* Chemosensors 2025, 13, 264.
https://doi.org/10.3390/chemosensors13070264

Two-dimensional nanozyme nanoarchitectonics customized electrochemical bio diagnostics and lab-on-chip devices for biomarker detection

Thenmozhi Rajarathinam, Sivaguru Jayaraman, Chang-Seok Kim, Jang-Hee Yoon, Seung-Cheol Chang*Adv. Colloid Interface Sci.. 2025, 341, 103474.
https://doi.org/10.1016/j.cis.2025.103474

Enhanced bifunctional water electrolysis performance of spherical ZnMn2O4 nanoparticles

Sankar Sekar, Sutha Sadhasivam, Atsaya Shanmugam, S Saravanan, Ilanchezhiyan Pugazhendi, Youngmin Lee, Deuk Young Kim, Ramalingam Manikandan*, Seung-Cheol Chang*, Sejoon Lee*Int. J. Hydrog. Energy. 2025, 141, 721.
https://doi.org/10.1016/j.ijhydene.2024.09.048

Albumin fouling-free electrochemical sensors based on polyaniline single walled carbon nanotube composites for precise purine metabolomics

Thenmozhi Rajarathinam, Sivaguru Jayaraman, Devaraju Subramani, Suraj Aswale, Jaewon Lee, Hyun-jong Paik, Chang-Seok Kim, Jang-Hee Yoon, Seung-Cheol Chang*Compos. Commun. 2025, 56, 102363.
https://doi.org/10.1016/j.coco.2025.102363

Fabrication of bio-mimic nanozyme based on Mxene@ AuNPs and molecular imprinted poly (thionine) films for creatinine detection

Ramalingam Manikandan, Mi-Jeong Kim, Hyeon-Geun Jang, Aruljothi Mugunthan, Chang-Seok Kim, Jang-Hee Yoon, Jaewon Lee, Ki Wung Chung, Seung-Cheol Chang*Biosens. Bioelectron.. 2025, 271, 117075.
https://doi.org/10.1016/j.bios.2024.117075

Two dimensional FeVO4 nanoflakes decorated on Ti3C2 MXene hybrid nanocomposites as a novel effective electrochemical biosensor for ultrasensitive and selective detection of serotonin (5-HT)

Pugazhendi Ilanchezhiyan*, Ramalingam Manikandan, Sankar Sekar, Dong Jin Lee, Hee Chang Jeon, Sejoon Lee, Seung-Cheol Chang, Deuk Young Kim Appl. Surf. Sci. 2025, 680, 161411.
https://doi.org/10.1016/j.apsusc.2024.161411

Nano-engineered paper-based electrochemical biosensors: Versatile diagnostic tools for biomarker detection

Ramalingam Manikandan, Hyeon-Geun Jang, Chang-Seok Kim, Jang-Hee Yoon, Jaewon Lee, Hyun-jong Paik, Seung-Cheol Chang*Coord. Chem. Rev. 2025, 523, 216261.
https://doi.org/10.1016/j.ccr.2024.216261

Portable amperometric biosensor enhanced with enzyme-ternary nanocomposites for prostate cancer biomarker detection

Thenmozhi Rajarathinam, Sivaguru Jayaraman, Chang-Seok Kim, Jaewon Lee, Seung-Cheol Chang* Biosensors, 2024, 14, 623.
https://doi.org/10.3390/bios14120623

Electrodes coated with polyaniline/cerium tungstate nanostructures for detection of hydrazine in food and environmental samples

Ramalingam Manikandan, Hyeon-Geun Jang, Chang-Seok Kim, Jang-Hee Yoon, Jaewon Lee, Hyun-jong Paik, Seung-Cheol Chang* ACS Appl. Nano Mater. 2024, 20, 24112.
https://doi.org/10.1021/acsanm.4c04675

A smartphone-based tunable tyrosinase functional mimic modulated portable amperometric sensor for the rapid and real-time monitoring of catechol

Sivaguru Jayaraman, Thenmozhi Rajarathinam, Deepan Chakravarthi Nagarajan, Prabakar Kandasamy, Sangheon Jeon, Chang-Seok Kim, Suck Won Hong, Hyun-jong Paik, Seung-Cheol Chang*Chem. Eng. J. 2024, 497, 154811.
https://doi.org/10.1016/j.cej.2024.154811

Non-enzymatic disposable paper sensor for electrochemical detection of creatinine

Ramalingam Manikandan, Jang-Hee Yoon, Jaewon Lee, Seung-Cheol Chang* Microchem. J. 2024, 204, 111114.
https://doi.org/10.1016/j.microc.2024.111114

Utilizing a disposable sensor with polyaniline-doped multi-walled carbon nanotubes to enable dopamine detection in ex vivo mouse brain tissue homogenates

Thenmozhi Rajarathinam, Sivaguru Jayaraman, Jaeheon Seol, Jaewon Lee, Seung-Cheol Chang* Biosensors, 2024, 14, 262.
https://doi.org/10.3390/bios14060262

Disposable microRNA biosensors based on dual-role polymer-dispersed silver nanowires for diagnosis of viral hemorrhagic septicemia virus infection in olive flounder

Dinakaran Thirumalai†, Woo Ryung Kim†, Hyeyoung Joo, Thenmozhi Rajarathinam, Eun Gyung Park, Yun Ju Lee, Hyun-jong Paik, Jaewon Lee, Heui-Soo Kim*, Seung-Cheol Chang*Aquaculture, 2024, 580, 740287.
https://doi.org/10.1016/j.aquaculture.2023.740287

Recent advances in miniaturized electrochemical analyzers for hazardous heavy metal sensing in environmental samples

Ramalingam Manikandan, Thenmozhi Rajarathinam, Sivaguru Jayaraman, Hyeon-Geun Jang, Jang-Hee Yoon, Jaewon Lee, Hyun-jong Paik, Seung-Cheol Chang* Coord. Chem. Rev. 2024, 499, 215487.
https://doi.org/10.1016/j.ccr.2023.215487

Conductive PEDOT: PSS copolymer electrode coatings for selective detection of dopamine in ex vivo mouse brain slices

Dinakaran Thirumalai†, Devaraju Subramani†, Jaehoon Kim†, Thenmozhi Rajarathinam, Jang-Hee Yoon, Hyun-jong Paik*, Jaewon Lee*, Seung-Cheol Chang*Talanta 2024, 267, 125252.
https://doi.org/10.1016/j.talanta.2023.125252

Glutamate oxidase sheets-Prussian blue grafted amperometric biosensor for the real time monitoring of glutamate release from primary cortical neurons

Thenmozhi Rajarathinam, Dinakaran Thirumalai, Sivaguru Jayaraman, Seonguk Yang, Akihito Ishigami, Jang-Hee Yoon, Hyun-jong Paik, Jaewon Lee*, Seung-Cheol Chang* Int. J. Biol. Macromol.. 2024, 254, 127903.
https://doi.org/10.1016/j.ijbiomac.2023.127903