Subash Chandra Bose Gopinath
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Preferred name
Subash Chandra Bose Gopinath
Official Name
Subash Chandra Bose, Gopinath
Alternative Name
Gopinath, S.
Gopinath, S. C.B
Subash Gopinath, C. B.
Subash, Gopinath
Subash C. B. Gopinath
Main Affiliation
Scopus Author ID
7006558013
Researcher ID
D-2953-2015

Research Output
Now showing 1 - 8 of 8
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Biomass-derived graphene and metal–organic frameworks for sustainable sensing applications

2025 , Narendra B. Patil , Vemula Madhavi , Subash Chandra Bose Gopinath , Santheraleka Ramanathan , Sharangouda J. Patil , Ajay Bhalkar

Across the world, biomass serves as a natural and plentiful carbon source. It comes in several forms such as plant leaves, grasses, rice husks, coffee grounds, biomolecules, and wastes from agriculture, food production, and municipal sources. Consequently, the exploration of sustainable and preferably affordable assets for creating high-efficiency materials remains a key objective. Nowadays, there is a notable advancement in the development of biomass-derived graphene-based nanomaterials and MOFs, due to their stable, renewable, and economically viable nature. Additionally, it contributes to effective waste management. In this sense, graphene-based nanomaterials and metal–organic frameworks (MOFs) have drawn considerable interest in sensing applications due to their remarkable features, including characteristics like extensive surface area, optical and electrical qualities, biocompatibility, and reliable stability. This review focuses on the research conducted to date and the advancements made in the potential application of graphene-based nanomaterials and MOF probes in sensing technologies. Initially, the review discusses the basic and chemical properties of biomass, the characteristics of graphene and MOFs, and green synthesis techniques for graphene-based nanomaterials and MOFs derived from biomass. Following this, the latest developments in graphene-based nanomaterials and MOFs from biomass are explored. Lastly, the future prospects of graphene-based nanomaterials and MOF probes are discussed. Finally, graphene-based nanomaterials and MOFs emerge as novel probes with a range of benefits, including high sensitivity, strong selectivity, remarkable stability, and quick response times in sensing applications. Therefore, this study aims to provide insights for emerging researchers to design advanced graphene-based nanomaterials and MOF probes for sensing applications in the future.

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Synthesis and characterization of reduced graphene oxide using the aqueous extract of Eclipta prostrata

2020-08-01 , Chuah Regnant , Subash Chandra Bose Gopinath , Anbu P. , Midhat Nabil Ahmad Salimi , Ahmad Radi Wan Yaakub , Lakshmipriya Thangavel

In this study, biological deoxygenation of graphene oxide (GO) using an Eclipta prostrata phytoextract was performed via the infusion method. The presence of oxide groups on the surface of graphene and removal of oxides groups by reduction were characterized through morphological and structural analyses. Field emission scanning electron microscopy images revealed that the synthesized GO and rGO were smooth and morphologically sound. Transmission electron microscopy images showed rGO developing lattice fringes with smooth edges and transparent sheets. Atomic force microscopy images showed an increase in the surface roughness of graphite oxide (14.29 nm) compared with that of graphite (1.784 nm) due to the presence of oxide groups after oxidation, and the restoration of surface roughness to 2.051 nm upon reduction. Energy dispersive X-ray analysis indicated a difference in the carbon/oxygen ratio between GO (1.90) and rGO (2.70). Fourier-transform infrared spectroscopy spectrum revealed peak stretches at 1029, 1388, 1578, and 1630 cm−1 for GO, and a decrease in the peak intensity after reduction that confirmed the removal of oxide groups. X-ray photoelectron microscopy also showed a decrease in the intensity of oxygen peak after reduction. In addition, thermogravimetric analysis suggested that rGO was less thermally stable than graphite, graphite oxide, and GO, with rGO decomposing after heating at temperatures ranging from room temperature to 600 Â°C.

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Feasibility of graphene in biomedical applications

2017-10-01 , Mu Ee Foo , Subash Chandra Bose Gopinath

Nanotechnology is the developing field, bringing the materials in the nanoscale level, has been applied in the interdisciplinary sciences. Different nanomaterials, such as gold, silver, zinc, copper and graphene are shown to have a wide range of applications. Among these, graphene is one of the faster upcoming two-dimensional nanomaterials utilized in various fields due to its positive features including the properties of thermal, electrical, strength and elasticity. Biomedical applications of graphene have been widely attested to be popular among academician and industrial partners for creating next generation medical systems and therapies. In this review, we selectively revealed the current applications of graphene in the interdisciplinary medical sciences.

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Electrochemical performance and material characterization of synthesized graphene/silver nanocomposite

2025-01 , K. Siva , M. Manimehalai , S. Balaguru Venkatesh , T. Theivasanthi , Subash Chandra Bose Gopinath

Few layered graphene has more platelet-like structures. This causes more stacking and aggregation of graphene sheets. Silver nanoparticles are intercalated between these sheets. Silver nanoparticles are able to tailor the physical and electrochemical properties of graphene. The graphene/silver nanoparticle composite is synthesized using a high-temperature solid-state synthesis technique with tartaric acid as the activating agent. The nanocomposite is characterized by XRD, UV–visible analysis, FTIR, SEM, and cyclic voltammetry. The formation of the graphene/silver nanocomposite is confirmed by the XRD spectrum. Peaks at 290 and 450 nm in the UV–visible spectrum of the graphene/silver nanocomposite indicate the plasmonic properties of both constituent materials. The intercalation of spherical particles in between the two-dimensional sheets is clearly observed from SEM images. The silver nanoparticles are well-intercalated within the graphene matrix and exhibit excellent electrochemical performance. The electrochemical measurements confirm the feasibility of the obtained nanocomposite to fabricate the electrodes for energy storage devices. The cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD), electrochemical impedance spectroscopy (EIS), and the cyclic stability are obtained through the electrochemical test. The highest specific capacitance obtained for graphene/silver composite is 851.68 F/g.

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Oil palm lignin derived laser scribed graphene for supercapacitor application

2022-12 , Sathaniswarman Remesh , Mugashini Vasudevan , Veeradasan Perumal , Subash Chandra Bose Gopinath , Saravanan Karuppanan , Pandian Bothi Raja , Mohamad Nasir Mohamad Ibrahim

Finding a promising material as an alternative resource to replace the consumption of fossil fuels is necessary as the depletion of fossil fuels is increasing annually. A novel approach was explored to produce graphene from natural renewable resources. In this work, a laser scribing technique was conducted to produce large-scale graphene from Empty Fruit Bunches (EFB) of oil palm lignin biopolymer by varying the laser power. The morphology, structure, and electrical conductivity of scribed graphene were investigated at different laser power. Herein, a porous form-like structure with multilayered graphene was obtained at a laser power of 75%. The crystallite size (La) of laser power 75% was 28.4nm which shows a higher degree of graphitization was formed as laser power rises. Furthermore, the resistance was lesser at 75% laser power compared to 50% laser power concluding that 75% laser power has better electrical conductivity than low laser power. Hence, lignin-based laser scribed graphene (LSG) can be a promising and sustainable green substrate material to be utilized in supercapacitor applications.

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Recent advances in density functional theory approach for optoelectronics properties of graphene

2023 , A.L. Olatomiwa , Tijjani Adam , Collins Okon Edet , Adekunle Adewale Akeem , Abdullah Chik , Mohammed Mohammed , Subash Chandra Bose Gopinath , Uda Hashim

Graphene has received tremendous attention among diverse 2D materials because of its remarkable properties. Its emergence over the last two decades gave a new and distinct dynamic to the study of materials, with several research projects focusing on exploiting its intrinsic properties for optoelectronic devices. This review provides a comprehensive overview of several published articles based on density functional theory and recently introduced machine learning approaches applied to study the electronic and optical properties of graphene. A comprehensive catalogue of the bond lengths, band gaps, and formation energies of various doped graphene systems that determine thermodynamic stability was reported in the literature. In these studies, the peculiarity of the obtained results reported is consequent on the nature and type of the dopants, the choice of the XC functionals, the basis set, and the wrong input parameters. The different density functional theory models, as well as the strengths and uncertainties of the ML potentials employed in the machine learning approach to enhance the prediction models for graphene, were elucidated. Lastly, the thermal properties, modelling of graphene heterostructures, the superconducting behaviour of graphene, and optimization of the DFT models are grey areas that future studies should explore in enhancing its unique potential. Therefore, the identified future trends and knowledge gaps have a prospect in both academia and industry to design future and reliable optoelectronic devices.

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Sulphur/mechanochemical graphene/bismuth phosphate composite as a cathode for enhanced performance in lithium-sulphur batteries

2025-02 , K. Siva , M. Murugesan , S. R. Srikumar , T. Theivasanthi , Subash Chandra Bose Gopinath

A lithium-sulphur battery is fabricated by incorporating graphene and bismuth phosphate (BiPOâ‚„) into the cathode. BiPOâ‚„ is synthesized via a hydrothermal method, while graphene is prepared through a mechanochemical process. A sulphur/mechanochemical graphene/bismuth phosphate composite is then prepared and analyzed using various characterization techniques. Functional groups are identified through FTIR analysis, and the crystal structure and chemical composition are examined using X-ray diffraction. Scanning electron microscopy is employed to explore the size distribution and surface morphology of the composite. The electrochemical behaviour of the cathode material is characterized using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge/discharge (GCD) techniques. The CV measurements confirm a high specific capacitance of 476.78 F/g at a scan rate of 10 mV/s for the composite. The cathode material retains 99.52% of its capacitance at 1 A/g even after 1,500 cycles, demonstrating long-term stability. A well-performing S/MCG-Bi(POâ‚„)-800 cathode was used to construct the coin cell. The CR2032 coin cell with S/MCG-Bi(POâ‚„)-800 as the cathode demonstrates a specific capacity of 61 mAh/g during charging and 47 mAh/g during discharging. However, by the 50th cycle, the capacity retention decreases to 60.78%. Additionally, the coulombic efficiency at constant current is measured at 80.02%.

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A Review on Graphene Analytical Sensors for Biomarker-based Detection of Cancer

2024-01-01 , Subash Chandra Bose Gopinath , Ramanathan S. , More M. , Patil K. , Patil S.J. , Patil N. , Mahajan M. , Madhavi V.

The engineering of nanoscale materials has broadened the scope of nanotech-nology in a restricted functional system. Today, significant priority is given to immediate health diagnosis and monitoring tools for point-of-care testing and patient care. Graphene, as a one-atom carbon compound, has the potential to detect cancer biomarkers and its derivatives. The atom-wide graphene layer specialises in physicochemical characteristics, such as improved electrical and thermal conductivity, optical transparency, and increased chemical and mechanical strength, thus making it the best material for cancer biomarker detection. The outstanding mechanical, electrical, electrochemical, and optical properties of two-dimensional graphene can fulfil the scientific goal of any biosensor development, which is to develop a more compact and portable point-of-care device for quick and early cancer diagnosis. The bio-functionalisation of recognised biomarkers can be improved by oxygenated graphene layers and their composites. The significance of graphene that gleans its missing data for its high expertise to be evaluated, including the variety in surface modification and analytical reports. This review provides critical insights into graphene to inspire research that would address the current and remaining hurdles in cancer diagnosis.

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