Bibhu P. Swain

National Institute of Technology Manipur

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Rabina Bhujel

Sikkim Manipal University

Sadhna Rai

Sikkim Manipal University

Bhabani Sankar Swain

Kookmin University

Joydeep Biswas

Sikkim Manipal University

Sanketa Jena

National Institute of Technology Manipur

Sumitra Nongthombam

National Institute of Technology Manipur

Santanu Das

University of Kalyani

Naorem Aruna Devi

National Institute of Technology Karnataka

Nong‐Moon Hwang

Seoul National University

Aishwarya Madhuri

National Institute of Technology Manipur

Cooperative Institutions

Sikkim Manipal University

National Institute of Technology Manipur

Indian Institute of Technology Bombay

Indian Institute of Technology Indore

Bhabha Atomic Research Centre

Seoul National University

Jadavpur University

Indian Institute of Technology Kharagpur

Sikkim University

Indian Institute of Engineering Science and Technology, Shibpur

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Correlation of microstructural and chemical bonding of FeNi-rGO nanocomposites

Journal of Alloys and Metallurgical Systems (2023)

Sambit Kumar Sahoo Aishwarya Madhuri Akash Saini Sanketa Jena Pukhrambam Sushma Devi

This study used the chemical reduction method to synthesize iron-nickel (FeNi)-reduced graphene oxide (rGO) nanocomposites. FeNi-rGO nanocomposites were characterized by Scanning Electron Microscope (SEM), X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy, UV-Vis spectroscopy and Energy dispersive spectroscopy (EDX) to investigate morphology, structural, chemical bonding, optical and compositional study respectively. SEM images revealed the connective network of grains first increased from 186 nm to 295 nm for Fe(1)-rGO to Fe(0.6)Ni(0.4)-rGO and then decreased from 250 nm to 217 nm for Fe(0.4)Ni(0.6)-rGO to Ni(1)-rGO with increased wt.% of Ni and decreased wt.% of Fe. The crystallite size estimated by the Debye Scherrer equation and WH-plotting also ranged from 12.32 nm to 27.40 nm and 18.70 nm to 27.32 nm respectively, with the increase in Fe wt.%. However, the micro-strain of FeNi-rGO altered between 0.00276 to 0.00578. The metallic oxide chemical bond was found to be shifted to a higher frequency with the addition of Ni indicating an increase in the backing of oxygen or carbon with the metal network. The carbon defect parameter, ID/IG varied between 1.40 to 2.48. EDX data analysis showed the presence of C, O, Fe and Ni as primary elements. An increase in the bandgap of nanocomposites in response to UV-visible radiation was observed with the increase in wt.% of Ni.

Energy-dispersive X-ray spectroscopy

10.1016/j.jalmes.2023.100035

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Citations (7)

Time resolved photoluminescence of hydrogenated amorphous silicon carbon thin films deposited by HWCVD

Journal of Non-Crystalline Solids (2006)

Bibhu P. Swain T.K. Gundu Rao Rajiv O. Dusane

Amorphous carbon

Carbon fibers

10.1016/j.jnoncrysol.2006.02.020

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Citations (3)

Comparative assessment and experimental analysis of atomic coordination and mechanical properties of sputter deposited Ti-rich TiN, TiC, and TiCN thin films

Journal of Alloys and Compounds (2024)

Sanketa Jena Aishwarya Madhuri Mukul Gupta Bibhu P. Swain

Titanium carbide

10.1016/j.jallcom.2024.175217

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Biocompatibility of Hydrogen-Diluted Amorphous Silicon Carbide Thin Films for Artificial Heart Valve Coating

Journal of Materials Engineering and Performance (2018)

Umesh Rizal Bhabani Sankar Swain N. Rameshbabu Bibhu P. Swain

Biocompatibility

10.1007/s11665-018-3198-9

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Citations (9)

Evolution of Electroless Cu/Cuxo Nanostructured Thin Films: Study of Surface Fractal, Tuning Band Gap and Electronic Structure

Aishwarya Madhuri Sanketa Jena Sumitra Dutta Bibhu P. Swain

Download This Paper Open PDF in Browser Add Paper to My Library Share: Permalink Using these links will ensure access to this page indefinitely Copy URL Copy DOI

10.2139/ssrn.4665476

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Modelling of Thermoelectric and Conduction Mechanism of Multi-nanoribbon Matrix

Lecture notes in electrical engineering (2018)

Amit Agarwal Prashanta Chandra Pradhan Bibhu P. Swain

Matrix (chemical analysis)

10.1007/978-981-10-7901-6_1

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Raman Characterization of Gallium Nitride Nanowires Deposited by Chemical Vapor Deposition

Lecture notes in electrical engineering (2017)

Umesh Rizal Bibhu P. Swain

10.1007/978-981-10-4394-9_6

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Citations (3)

Capacitive and Sensing Responses of Biomass Derived Silver Decorated Graphene

Scientific Reports (2019)

Rabina Bhujel Sadhna Rai Khanindram Baruah Utpal Deka Joydeep Biswas

A new, easy and green method is utilized for producing silver decorated graphene for its application in sensors and supercapacitors. The biomass-derived silver decorated graphene (AgGr) samples are prepared using an APCVD reactor with varying the process temperature from 600 to 800 °C. The as-synthesized AgGr samples were then characterized by AFM, SEM, Raman spectroscopy, FTIR spectroscopy, XRD, cyclic voltammetry and impedance spectroscopy. The interlayer spacing and ID/IG ratio of the AgGr samples varied from 3.6 to 3.7 Å and 0.87 to 1.52, respectively, as the process temperature was raised from 600 to 800 °C. The SEM image shows the distribution of the flower-like structure of Ag flakes in the graphene sheet for the AgGr-800 sample. Also, the greater number of active sites on the surface of AgGr-800 and the presence of a higher number of defects makes it least useful for p-nitrophenol sensing due to the excess opening of the CV curve but has a maximum capacitance of 93.5 Fg-1 in 1 M H2SO4. AgGr-600 showed extremely good sensing of p-nitrophenol than the other AgGr samples. Therefore this novel technique can be utilized for the large scale manufacture of various metal decorated graphene samples for their application in different fields.

10.1038/s41598-019-56178-4

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Citations (34)

Correlation Between I-V and Bonding Network of Fe₃O₄/rGO Nanocomposite

2020 IEEE VLSI DEVICE CIRCUIT AND SYSTEM (VLSI DCS) (2020)

Naorem Aruna Devi Sumitra Nongthombam Sayantan Sinha Rabina Bhujel Sadhna Rai

Reduced graphene oxide based iron oxide (Fe3O4/ rGO) nanocomposites were synthesized by reduction of as synthesized graphene oxide (GO) in the existence of Fe(NO3)3 concentration. A various characterisation techniques such as SEM, XRD, FTIR, Raman spectroscopy, UV-Visible, and XPS have been utilised for the determination of the morphological, structural, chemical, microstructure, optical and compositional properties of as synthesized Fe3O4/rGO nanocomposite. The XRD results shows a broad peak of rGO at 26.51° which attributes to (002) plane and other two weak peaks appeared at 2θ= 36.4° and 43.1° that attributes to (311) and (400) planes respectively for Fe3O4 confirming the existence of Fe3O4 into the Fe3O4/rGO nanocomposite with poor crystallinity. The vibrational signatures owing to the O-H, C-H2, C=O, C=C, C-O and Fe-O bonds appeared at 3292 cm ^-1 , 2990.42 cm ^-1 , 2360.87 cm ^-1 , 1558.13 cm ^-1 , 1176.47 cm ^-1 , and 575.64 cm ^-1 respectively. The Fe ₃ O ₄ peak is obtained in between 100-800 cm ^-1 range in the Raman analysis and the value of ID/IG was obtained as 1.55. Furthermore, the current-voltage (I-V) measurement for Fe3O4/rGO nanocomposites exhibited non-Ohmic electrical conductivity.

10.1109/vlsidcs47293.2020.9179905

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A green approach for synthesis of graphene

AIP conference proceedings (2020)

Sadhna Rai Rabina Bhujel Joydeep Biswas Bibhu P. Swain

Graphene has incomparable thermal, electrical, chemical, optical and mechanical properties which boost its applicability in various areas. As a result there is a huge demand for the manufacture of graphene which will increase more in the near future. There exists several methods for synthesis of graphene including top down and bottom up approaches. Moreover, among the various methods chemical reduction approach is highly efficient, simple and commonly used for the production of graphene in huge scale. Nonetheless, it makes use of harsh and noxious chemicals like hydrazine, sodium borohydride, etc. which is detrimental for both humans and the nature. Hence, an alternative path for the reduction procedure is required where green reducing agents come to play their role. In this review we have studied the synthesis of graphene using green agents mainly plant extracts and biomolecules. In addition, possible reaction mechanisms for reduction of graphene oxide such as with L-cysteine and ascorbic acid are discussed.

Sodium borohydride

Reducing agent

Hydrazine (antidepressant)

10.1063/5.0024237

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Citations (3)