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From scrap metal to highly efficient electrodes: harnessing the nanotextured surface of swarf for effective utilisation of Pt and Co for hydrogen production (2024)
Journal Article
Thangamuthu, M., Kohlrausch, E. C., Li, M., Speidel, A., Clare, A. T., Plummer, R., …Alves Fernandes, J. (2024). From scrap metal to highly efficient electrodes: harnessing the nanotextured surface of swarf for effective utilisation of Pt and Co for hydrogen production. Journal of Materials Chemistry A, https://doi.org/10.1039/d4ta00711e

Hydrogen is considered to be the key element to achieving climate neutrality, leading to a massive demand for electrocatalysts. This work explores the transformation of metal waste into active and stable electrode materials for water splitting by mod... Read More about From scrap metal to highly efficient electrodes: harnessing the nanotextured surface of swarf for effective utilisation of Pt and Co for hydrogen production.

Synergy of nanocrystalline carbon nitride with Cu single atom catalyst leads to selective photocatalytic reduction of CO2 to methanol (2024)
Journal Article
LeMercier, T. M., Thangamuthu, M., Kohlrausch, E. C., Chen, Y., Stoppiello, C. T., Fay, M. W., …Khlobystov, A. N. (2024). Synergy of nanocrystalline carbon nitride with Cu single atom catalyst leads to selective photocatalytic reduction of CO2 to methanol. Sustainable Energy and Fuels, 1691-1703. https://doi.org/10.1039/D4SE00028E

Carbon nitride (C3N4) possesses both a band gap in the visible range and a low-lying conduction band potential, suitable for water splitting and CO2 reduction reactions (CO2RR). Yet, bulk C3N4 (b-C3N4) suffers from structural disorder leading to slug... Read More about Synergy of nanocrystalline carbon nitride with Cu single atom catalyst leads to selective photocatalytic reduction of CO2 to methanol.

Direct Deposition of Copper Atoms onto Graphitic Step Edges Lowers Overpotential and Improves Selectivity of Electrocatalytic CO2 Reduction (2024)
Working Paper
Thangamuthu, M., Burwell, T., Aliev, G., Ghaderzadeh, S., Kohlrausch, E., Chen, Y., …Khlobystov, A. Direct Deposition of Copper Atoms onto Graphitic Step Edges Lowers Overpotential and Improves Selectivity of Electrocatalytic CO2 Reduction

Minimizing our reliance on bulk precious metals is to increase the fraction of surface atoms and improve the metal-support interface. In this work, we employ a solvent/ligand/counterion-free method to deposit copper in the atomic form directly onto a... Read More about Direct Deposition of Copper Atoms onto Graphitic Step Edges Lowers Overpotential and Improves Selectivity of Electrocatalytic CO2 Reduction.

Tungsten Oxide-Based Z-Scheme for Visible Light-Driven Hydrogen Production from Water Splitting (2023)
Journal Article
Thangamuthu, M., Vankayala, K., Xiong, L., Conroy, S., Zhang, X., & Tang, J. (2023). Tungsten Oxide-Based Z-Scheme for Visible Light-Driven Hydrogen Production from Water Splitting. ACS Catalysis, 13(13), 9113-9124. https://doi.org/10.1021/acscatal.3c01312

The stoichiometric water splitting using a solar-driven Z-scheme approach is an emerging field of interest to address the increasing renewable energy demand and environmental concerns. So far, the reported Z-scheme must comprise two populations of ph... Read More about Tungsten Oxide-Based Z-Scheme for Visible Light-Driven Hydrogen Production from Water Splitting.

Polymer Photoelectrodes for Solar Fuel Production: Progress and Challenges (2022)
Journal Article
Thangamuthu, M., Ruan, Q., Ohemeng, P. O., Luo, B., Jing, D., Godin, R., & Tang, J. (2022). Polymer Photoelectrodes for Solar Fuel Production: Progress and Challenges. Chemical Reviews, 122(13), 11778-11829. https://doi.org/10.1021/acs.chemrev.1c00971

Converting solar energy to fuels has attracted substantial interest over the past decades because it has the potential to sustainably meet the increasing global energy demand. However, achieving this potential requires significant technological advan... Read More about Polymer Photoelectrodes for Solar Fuel Production: Progress and Challenges.

Author Correction: Single-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56% (2022)
Journal Article
Zhang, Y., Zhao, J., Wang, H., Xiao, B., Zhang, W., Zhao, X., …Liu, Q. (2022). Author Correction: Single-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56%. Nature Communications, 13, Article 2062. https://doi.org/10.1038/s41467-022-29799-z

Correction to: Nature Communications https://doi.org/10.1038/s41467-021-27698-3, published online 10 January 2022. In Supplementary Fig. 28b in the Supplementary PDF for this article, the figure panel incorrectly read ‘345 mW/cm2’ but should have... Read More about Author Correction: Single-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56%.

Review - Origin and Promotional Effects of Plasmonics in Photocatalysis (2022)
Journal Article
Thangamuthu, M., Raziman, T., Martin, O. J. F., & Tang, J. (2022). Review - Origin and Promotional Effects of Plasmonics in Photocatalysis. Journal of The Electrochemical Society, 169(3), Article 036512. https://doi.org/10.1149/1945-7111/ac5c97

Plasmonic effects including near-field coupling, light scattering, guided mode through surface plasmon polaritons (SPPs), F rster resonant energy transfer (FRET), and thermoplasmonics are extensively used for harnessing inexhaustible solar energy for... Read More about Review - Origin and Promotional Effects of Plasmonics in Photocatalysis.

Single-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56% (2022)
Journal Article
Zhang, Y., Zhao, J., Wang, H., Xiao, B., Zhang, W., Zhao, X., …Liu, Q. (2022). Single-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56%. Nature Communications, 13, Article 58. https://doi.org/10.1038/s41467-021-27698-3

Single-atom catalysts anchoring offers a desirable pathway for efficiency maximization and cost-saving for photocatalytic hydrogen evolution. However, the single-atoms loading amount is always within 0.5% in most of the reported due to the agglomerat... Read More about Single-atom Cu anchored catalysts for photocatalytic renewable H2 production with a quantum efficiency of 56%.

Energy Platform for Directed Charge Transfer in the Cascade Z-Scheme Heterojunction: CO2 Photoreduction without a Cocatalyst (2021)
Journal Article
Bian, J., Zhang, Z., Feng, J., Thangamuthu, M., Yang, F., Sun, L., …Jing, L. (2021). Energy Platform for Directed Charge Transfer in the Cascade Z-Scheme Heterojunction: CO2 Photoreduction without a Cocatalyst. Angewandte Chemie International Edition, 60(38), 20906-20914. https://doi.org/10.1002/anie.202106929

A universal strategy is developed to construct a cascade Z-Scheme system, in which an effective energy platform is the core to direct charge transfer and separation, blocking the unexpected type-II charge transfer pathway. The dimension-matched (001)... Read More about Energy Platform for Directed Charge Transfer in the Cascade Z-Scheme Heterojunction: CO2 Photoreduction without a Cocatalyst.

Reliable Langmuir Blodgett colloidal masks for large area nanostructure realization (2020)
Journal Article
Thangamuthu, M., Santschi, C., & Martin, O. J. (2020). Reliable Langmuir Blodgett colloidal masks for large area nanostructure realization. Thin Solid Films, 709, Article 138195. https://doi.org/10.1016/j.tsf.2020.138195

The fabrication of highly ordered nanostructures over large areas is key for many technologies and colloidal lithography using the Langmuir Blodgett technique appears a simple and straightforward way of reaching that goal. While this technique has be... Read More about Reliable Langmuir Blodgett colloidal masks for large area nanostructure realization.

Graphene- and Graphene Oxide-Based Nanocomposite Platforms for Electrochemical Biosensing Applications (2019)
Journal Article
Thangamuthu, M., Hsieh, K. Y., Kumar, P. V., & Chen, G. (2019). Graphene- and Graphene Oxide-Based Nanocomposite Platforms for Electrochemical Biosensing Applications. International Journal of Molecular Sciences, 20(12), Article 2975. https://doi.org/10.3390/ijms20122975

Graphene and its derivatives such as graphene oxide (GO) and reduced GO (rGO) offer excellent electrical, mechanical and electrochemical properties. Further, due to the presence of high surface area, and a rich oxygen and defect framework, they are a... Read More about Graphene- and Graphene Oxide-Based Nanocomposite Platforms for Electrochemical Biosensing Applications.

Recent trends in electrochemical biosensors of superoxide dismutases (2018)
Journal Article
Balamurugan, M., Santharaman, P., Madasamy, T., Rajesh, S., Sethy, N. K., Bhargava, K., …Karunakaran, C. (2018). Recent trends in electrochemical biosensors of superoxide dismutases. Biosensors and Bioelectronics, 116, 89-99. https://doi.org/10.1016/j.bios.2018.05.040

Superoxide dismutases (SODs), a family of ubiquitous enzymes, provide essential protection to biological systems against uncontrolled reactions with oxygen- and nitrogen- based radical species. We review first the role of SODs in oxidative stress and... Read More about Recent trends in electrochemical biosensors of superoxide dismutases.

Label-Free Electrochemical Immunoassay for C-Reactive Protein (2018)
Journal Article
Thangamuthu, M., Santschi, C., & J. F. Martin, O. (2018). Label-Free Electrochemical Immunoassay for C-Reactive Protein. Biosensors, 8(2), Article 34. https://doi.org/10.3390/bios8020034

C-reactive protein (CRP) is one of the most expressed proteins in blood during acute phase inflammation, and its minute level increase has also been recognized for the clinical diagnosis of cardio vascular diseases. Unfortunately, the available comme... Read More about Label-Free Electrochemical Immunoassay for C-Reactive Protein.

Electrochemical Sensor for Bilirubin Detection Using Screen Printed Electrodes Functionalized with Carbon Nanotubes and Graphene (2018)
Journal Article
Thangamuthu, M., Gabriel, W., Santschi, C., & Martin, O. (2018). Electrochemical Sensor for Bilirubin Detection Using Screen Printed Electrodes Functionalized with Carbon Nanotubes and Graphene. Sensors, 18(3), Article 800. https://doi.org/10.3390/s18030800

Practice oriented point-of-care diagnostics require easy-to-handle, miniaturized, and low-cost analytical tools. In a novel approach, screen printed carbon electrodes (SPEs), which were functionalized with nanomaterials, are employed for selective me... Read More about Electrochemical Sensor for Bilirubin Detection Using Screen Printed Electrodes Functionalized with Carbon Nanotubes and Graphene.

Virtual Instrumentation for Electrochemical Biosensor Applications (2017)
Journal Article
Madasamy, T., Pandiaraj, M., Balamurugan, M., Santharaman, P., Venkatesh, A., Vairamani, K., …Karunakaran, C. (2017). Virtual Instrumentation for Electrochemical Biosensor Applications. Sensor Letters, 15(1), 1-10. https://doi.org/10.1166/sl.2017.3762

Virtual instrumentation (VI) is defined as an instrument whose general function and capabilities are determined in software. Especially, graphical user interface (GUI) software LabVIEW (Laboratory Virtual Instrumentation Engineering Workbench) is ide... Read More about Virtual Instrumentation for Electrochemical Biosensor Applications.

A Volume Miniaturized Hydrogen Peroxide Sensor Based on Peroxidase Activity of Copper(II) Chlorophyllin on Zinc Oxide and Polypyrrole Nanocomposite (2016)
Journal Article
Balamurugan, M., Santharaman, P., Madasamy, T., Claussen, J., & Karunakaran, C. (2016). A Volume Miniaturized Hydrogen Peroxide Sensor Based on Peroxidase Activity of Copper(II) Chlorophyllin on Zinc Oxide and Polypyrrole Nanocomposite. Sensor Letters, 14(7), 665-672. https://doi.org/10.1166/sl.2016.3666

Measurement of hydrogen peroxide (H2O2) is essential in human physiology and pathology as it provides valuable information with regard to signaling and prognostic of various diseases viz. oxidative stress and cardiovascular diseases. Therefore, we de... Read More about A Volume Miniaturized Hydrogen Peroxide Sensor Based on Peroxidase Activity of Copper(II) Chlorophyllin on Zinc Oxide and Polypyrrole Nanocomposite.

Enzymatic Biosensors (2015)
Book Chapter
Karunakaran, C., Madasamy, T., & Kumar Sethy, N. (2015). Enzymatic Biosensors. In Biosensors and Bioelectronics (133-204). Elsevier. https://doi.org/10.1016/b978-0-12-803100-1.00003-7

This chapter presents the definition and brief history of enzymatic biosensors and biomarkers, their types, and measurement for diagnosis of diseases. The glucose biosensors including noninvasive and implantable sensors for diabetes; cholesterol bios... Read More about Enzymatic Biosensors.

A miniaturized electrochemical assay for homocysteine using screen-printed electrodes with cytochrome c anchored gold nanoparticles (2015)
Journal Article
Madasamy, T., Santschi, C., & Martin, O. J. (2015). A miniaturized electrochemical assay for homocysteine using screen-printed electrodes with cytochrome c anchored gold nanoparticles. Analyst, 140(17), 6071-6078. https://doi.org/10.1039/c5an00752f

Determination of homocysteine (HcySH) is highly beneficial in human physiology and pathophysiology for diagnosis and prognosis of cardiovascular diseases (CVD). Unfortunately, the practicability of the existing methodologies for the determination of... Read More about A miniaturized electrochemical assay for homocysteine using screen-printed electrodes with cytochrome c anchored gold nanoparticles.