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Your search keyword '"Selvaganapathy, Muthusamy"' showing total 18 results
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18 results on '"Selvaganapathy, Muthusamy"'

15. Ultrasonication–dry-based synthesis of gold nanoparticle-supported CuFe on rGO nanosheets for competent detection of biological molecules

Author

Yun-Sung Lee, Ramkumar Balasubramaniam, Selvaganapathy Muthusamy, Mtangi Mohamed Mussa, Haigun Lee, Dawool Kwon, Hyun Sung Noh, Gopiraman Mayakrishnan, and Vijayakumar Elayappan

Subjects
Detection limit, Materials science, Graphene, General Physics and Astronomy, Nanoparticle, 02 engineering and technology, Surfaces and Interfaces, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, Surfaces, Coatings and Films, Electrochemical gas sensor, law.invention, Crystallinity, Chemical engineering, law, Electrode, Differential pulse voltammetry, Cyclic voltammetry, 0210 nano-technology
Abstract

This study details the synthesis of gold (Au) nanoparticle-supported copper ferrite (CF) over reduced graphene oxide (Au-CF@rGO) through ultrasonication–dry synthesis techniques. The vigorous stormy mixing and acoustic cavitation acquired from the intense shock waves produced during ultrasonication can effectively irradiate the reaction conditions. The as-synthesized nanoparticles exhibit excellent crystallinity as well as homogeneous distribution over rGO nanosheets, as established by XRD, HR-TEM, Raman, XPS, and EDX analysis. Furthermore, the electrochemical analysis by cyclic voltammetry and differential pulse voltammetry (DPV) technique was accomplished by fabricating an Au-CF@rGO/GCE modified electrode. Interestingly, the DPV studies of the modified Au-CF@rGO/GCE electrode detects the dopamine (DA) in the linear concentration ranges from 0.001 to 119.6 µM, a low detection limit of 0.001 µM, a limit of detection of 0.34 nM, and enhanced sensitivity of 8.743 µAµM−1cm−2. The excellent electrochemical property towards the detection of DA indicates the successful formation of strongly anchored Au-CF nanoparticles on rGO nanosheets. Conversely, the modified Au-CF@rGO/GCE electrode shows excellent reproducibility, repeatability, and selectivity with excellent storage stability. In addition, the electrochemical sensor was used to examine real samples to determine the amount of DA present in commercially available banana milk samples, with a sensing efficiency of approximately 99%.

Published
2020

18. Fabricating BiOCl/BiVO 4 nanosheets wrapped in a graphene oxide heterojunction composite for detection of an antihistamine in biological samples.

Author

Thirumalraj B, Jaihindh DP, Alaswad SO, Sudhakaran MSP, Selvaganapathy M, Alfantazi A, Choe H, and Kwon K

Subjects
Anti-Bacterial Agents, Electrodes, Histamine Antagonists, Reproducibility of Results, Graphite chemistry
Abstract

Antibiotics are essential medications for human and animal health, as they are used to battle urinary infections and bacterial diseases. Therefore, the rapid determination of antibiotic drugs in biological samples is necessary to address the current clinical challenge. Here, we developed a heterojunction ternary composite of BiOCl/BiVO 4 nanosheets enriched with graphene oxide (BiOCl/BiVO 4 @GO) for accurate and minimal-level detection of an antihistamine (promethazine hydrochloride, PMZ) in urine samples. The BiOCl/BiVO 4 nanosheets were prepared by a wet chemical approach using a deep eutectic green solvent. The spectroscopic and analytical methods verified the formation and interaction of the BiOCl/BiVO 4 @GO composite. Our results showed that the thoroughly exfoliated BiOCl/BiVO 4 @GO composite retained good electrical conductivity and fast charge transfer toward the electrode-electrolyte interface in neutral aqueous media. In addition, the experimental conditions were accurately optimized, and the BiOCl/BiVO 4 @GO composite showed excellent electrocatalytic activity toward the oxidation of PMZ. Indeed, the BiOCl/BiVO 4 @GO composite demonstrated a good linear response range (0.01-124.7 μM) and a detection level of 3.3 nM with a sensitivity of 1.586 μA μM -1  cm -2 . In addition, the BiOCl/BiVO 4 @GO composite had excellent storage stability, good reproducibility, and reliable selectivity. Finally, the BiOCl/BiVO 4 @GO displayed a desirable recovery level of PMZ in urine samples for real-time monitoring., (Copyright © 2022 Elsevier Inc. All rights reserved.)

Published
2022
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