I am currently an Assistant Professor of Physics at Parul University in Vadodara. I practice interactive teaching methods, mentoring of students, effective knowledge dissemination with real life examples.
My research expertise lies in preparing and processing nanomaterials, characterizations, designing and conducting experiments, fabricating devices, analyzing data, and effectively communicating research findings. I have also gained valuable experience in postdoctoral research focused on developing advanced materials for energy storage applications.
I am very much keen to obtain various grants and projects for necessary funding of research. I have strong writing skills for research articles, proposals, and reports, as well as expertise in data analysis. My goal is to apply my skills to real-world applications in engineering and industry, with a particular interest in semiconductor, supercapacitor, and battery technologies.
EDUCATION
2019-2021
Postdoctoral Researcher, Institute for Sustainable Energy, Shanghai University, Shanghai, China
Area of research - Energy storage (Supercapacitors, Na/Li-ion batteries)
2012-2018
Doctor of Philosophy (Materials Science), Jadavpur University, Kolkata, India
Area of research-Energy harvesting and storage applications of nanomaterials
Thesis title - Investigation on the synthesis and properties of earth abundant
metal chalcogenides
2009-2011
Master of Science (Physics), Banaras Hindu University, Varanasi, India
CGPA: 7.81, Percentage: 73.60, First Class
2006-2009
Bachelor of Science (Physics Honors), Durgapur Government College (The University of Burdwan), Durgapur, India
Percentage: 77.25 , First Class (3rd Rank holder from University)
RESEARCH, TEACHING, or OTHER INTERESTS
Condensed Matter Physics, Materials Science, Renewable Energy, Sustainability and the Environment, Electrochemistry
24
Scopus Publications
2190
Scholar Citations
19
Scholar h-index
23
Scholar i10-index
Scopus Publications
Earth-Abundant Cu2MnSnS4 Nanospheres for High-Performance Supercapacitive Energy Storage and Oxygen Evolution Reaction Samrat Sarkar, Swagata Roy, Dipayan Roy, Ayan Mukherjee, Promita Howli, Kalyan K. Chattopadhyay Chemistryselect, 2026 Cu 2 MnSnS 4 (CMTS) nanospheres were synthesized employing a facile solvothermal method. The material was thoroughly characterized and studied for electrochemical energy storage and oxygen evolution reaction (OER) in alkaline media. The FESEM and TEM analyses confirmed the formation of uniform nanospheres (∼200–250 nm) composed of hierarchical spherulites, while phase and structural analysis by XRD and Raman spectroscopy revealed a phase‐pure tetragonal structure. Additional characterization was done using EDS and FTIR spectroscopy. The as‐prepared CMTS was employed as a pseudocapacitive electrode material. The rough morphology provides efficient ion transport and abundant electroactive sites, contributing to a high specific capacitance of 524 F g −1 at a current density of 2 A g −1 and stable cycling performance. For electrocatalytic studies, CMTS delivered an overpotential of 353 mV at 10 mA cm −2 , a Tafel slope of 92 mV dec −1 , and a low charge‐transfer resistance of 30 Ω, comparable to the commercial 20% Pt/C catalyst. The catalyst retained its activity over 3000 continuous OER cycles, indicating good structural stability. The enhanced performance originates from the synergistic interaction of multi‐metallic active centers, sulfur defects, and the rough hierarchical nanostructure. Overall, CMTS nanospheres present a promising and novel bifunctional material for supercapacitor and alkaline OER applications.
A novel Mo8.7Nb6.1O x@NCs egg-nest composite structure as superior anode material for lithium-ion storage Shu-Ling Cheng, Xiu-Ping Yin, Samrat Sarkar, Zhen-Wei Wang, Qiu-An Huang, Jiu-Jun Zhang, Yu-Feng Zhao Rare Metals, 2022 Abstract Anode materials of lithium‐ion batteries (LIBs) endowed with high‐rate performance and fast charging capability are crucial for future energy storage systems. Here, Mo 8.7 Nb 6.1 O x @NCs (nitrogen‐doped carbon nanotubes, NCs) egg‐nest structure synthesized by an in‐situ solvothermal method is reported. The Mo 8.7 Nb 6.1 O x @NCs egg‐nest exhibits high embedding potential, high pseudo‐capacitance contribution rate (87.5%), and low charge transfer resistance. The electrochemical results show that Mo 8.7 Nb 6.1 O x @NCs demonstrates excellent rate performance (reversible capacity of 196.8 mAh·Ag −1 at 10 A·Ag −1 , and full charging only takes 1.1 min) and excellent cycle stability (reversible capacity of 513 mAh.Ag −1 at 0.5 A.Ag −1 combined with a capacity loss of only 5.4% after 100 cycles), outperforming the state‐of‐the‐art literature. The full cell is assembled with Mo 8.7 Nb 6.1 O x @NCs as the anode and LiFePO 4 as the cathode, which can provide a remarkably high energy density of 731.9 Wh·kg −1 , indicating its excellent prospect for practical applications.
Recent advances in semimetallic pnictogen (As, Sb, Bi) based anodes for sodium-ion batteries: Structural design, charge storage mechanisms, key challenges and perspectives Samrat Sarkar, Swagata Roy, Yufeng Zhao, Jiujun Zhang Nano Research, 2021 In the recent times sodium ion batteries (SIBs) have come to the forefront as an economic and resourceful alternative to lithium-ion batteries (LIBs) for powering portable electronic devices and large-scale grid storage. As the specific capacity, energy density and long cycle life of batteries depend upon the performance of anode materials; their quest is the ultimate need of the hour. Among the anode materials, the semimetallic pnictogens (As, Sb, Bi) and their compounds offer high gravimetric/volumetric capacities, but suffer from undesired volume expansion and inferior electrical conductivity. Herein, this paper reviews the recent progress in semimetallic pnictogens as alloying anodes and their compounds mainly as conversion-alloying anodes. Various debatable sodiation mechanisms (intercalation or alloying) have been presented with emphasis on in situ/ex situ advanced characterization methods well supported by theoretical modeling and calculations. The reviewed electrochemical reaction mechanisms, coherent structural designs and engineering provide a vital understanding of the electrochemical processes of Na+ ion storage. The existing challenges and perspectives are also presented, and several research directions are proposed from the aspects of special morphological design, employing conductive substrates, electrolyte additives and reducing particle size for technical and commercial success of SIBs.
A review of carbon dots and their composite materials for electrochemical energy technologies Yiming Liu, Swagata Roy, Samrat Sarkar, Jiaqiang Xu, Yufeng Zhao, Jiujun Zhang Carbon Energy, 2021 Abstract Carbon dots (CDs) and their composites as energy storage materials and electrocatalysts have emerged as new types of quasi‐zero‐dimensional carbon materials. CDs can provide a large specific surface area, numerous electron–electron hole pairs, adjustable heteroatom doping, rich surface functional groups, and so on. However, the roles and functional mechanisms of CDs and their composite materials in the enhancement of electrochemical performance remain unclear and need to be understood in depth. Based on the most recent literature, this paper comprehensively reviews the synthesis methods and applications of various categories of CDs and their composites as electrode materials of supercapacitors, lithium‐ion batteries, sodium‐ion batteries, and potassium‐ion batteries, and as electrocatalysts for hydrogen evolution, oxygen evolution, and oxygen reduction reactions in metal–air batteries, fuel cells, and water electrolysis. To facilitate further research and development, several important aspects related to CDs and their composite materials are summarized with analysis of the technical challenges in practical applications and discussion of the possible development perspectives.
Recent Progress in Amorphous Carbon-Based Materials for Anodes of Sodium-Ion Batteries: Synthesis Strategies, Mechanisms, and Performance Samrat Sarkar, Swagata Roy, Yanglong Hou, Shuhui Sun, Jiujun Zhang, Yufeng Zhao Chemsuschem, 2021 Sodium-ion batteries (SIBs) are gaining renewed interest as a promising alternative to the already commercialized lithium-ion batteries. The large abundance, low-cost and similar electrochemistry of sodium (with lithium) is attracting attention to the research community for their deployment in energy storage devices. Despite the fact that there are sufficient cathode materials, the choice of suitable anodes for SIBs is limited. Graphite, the most versatile anode material for LIBs exhibits poor performance in case of SIBs. Amorphous or disordered carbons (hard and soft carbon) have been the most promising and cost-effective anode materials for SIBs. This review discusses the recent advancements of various forms of amorphous or disordered carbons used in SIBs with emphasis on their synthesis processes, relationship between microstructure, morphology and performance. A profound understanding of the charge storage mechanisms of sodium in these carbon materials has been deliberated. The performance of these anode materials also depends upon electrolyte optimization which has been aptly conferred. However, these anodes are often plagued with large voltage loss, low initial coulombic efficiency (ICE) and formation of solid electrolyte interface (SEI). In order to overcome these challenges, several mitigation strategies have been put forward in a concise way to offer visions for the deployment of these amorphous carbon materials for the progress and commercial success of SIBs.
Hierarchical Assembly of MnO2Nanosheet on CuCo2O4Nanoflake over Fabric Scaffold for Symmetric Supercapacitor Kausik Chanda, Soumen Maiti, Samrat Sarkar, Partha Bairi, Subhasish Thakur, Kausik Sardar, Nripen Besra, Nirmalya Sankar Das, Kalyan Kumar Chattopadhyay ACS Applied Nano Materials, 2021 The soaring fidelity of spinel cobaltite system in electrochemistry presents its candidature as an electrode material for high-performance energy storage system and next generation portable devices...
Earth‐Abundant Cu 2 MnSnS 4 Nanospheres for High‐Performance Supercapacitive Energy Storage and Oxygen Evolution Reaction S Sarkar, S Roy, D Roy, A Mukherjee, P Howli, KK Chattopadhyay ChemistrySelect 11 (16), e07509 , 2026 2026
Electrodeposited Zn-Doped Co 3 O 4 Thin Films on Stainless Steel as Binder-Free Pseudocapacitive Electrodes for Supercapacitors A Kumar, S Sarkar, RG Ghosh, S Kumar, A Mukherjee Journal of Materials Engineering and Performance, 1-13 , 2026 2026
One-pot solvothermal route to stannite-like Cu2CoSnS4 microspheres as pseudocapacitive material for electrochemical energy storage S Sarkar, R Sarkar, S Roy, KK Chattopadhyay Solid State Sciences 154, 107601 , 2024 2024 Citations: 2
A novel Mo 8.7 Nb 6.1 O x @NCs egg-nest composite structure as superior anode material for lithium-ion storage: S.-L. Cheng et al. SL Cheng, XP Yin, S Sarkar, ZW Wang, QA Huang, JJ Zhang, YF Zhao Rare Metals 41 (8), 2645-2654 , 2022 2022 Citations: 24
Interface engineering of FeCo-Co structure as bifunctional oxygen electrocatalyst for rechargeable zinc-air batteries via alloying degree control strategy L Song, J Zhang, S Sarkar, C Zhao, Z Wang, C Huang, L Yan, Y Zhao Chemical Engineering Journal 433, 133686 , 2022 2022 Citations: 53
Recent advances in semimetallic pnictogen (As, Sb, Bi) based anodes for sodium-ion batteries: Structural design, charge storage mechanisms, key challenges and perspectives S Sarkar, S Roy, Y Zhao, J Zhang Nano Research 14 (11), 3690-3723 , 2021 2021 Citations: 63
A review of carbon dots and their composite materials for electrochemical energy technologies Y Liu, S Roy, S Sarkar, J Xu, Y Zhao, J Zhang Carbon Energy 3 (5), 795-826 , 2021 2021 Citations: 217
Recent progress in amorphous carbon‐based materials for anodes of sodium‐ion batteries: synthesis strategies, mechanisms, and performance S Sarkar, S Roy, Y Hou, S Sun, J Zhang, Y Zhao ChemSusChem 14 (18), 3693-3723 , 2021 2021 Citations: 85
Photocatalytic and sonocatalytic dye degradation by sulfur vacancy rich ZnS nanopowder S Ghosh, M Samanta, D Sen, S Sarkar, S Sarkar, KK Chattopadhyay Journal of Nanoparticle Research 23 (8), 160 , 2021 2021 Citations: 19
Enhanced electron emission from ternary solid solution-MWCNT hybrid with theoretical validation S Ghosh, S Maity, A Chandra, BK Das, N Besra, S Sarkar, S Sarkar, ... Materials Science in Semiconductor Processing 127, 105674 , 2021 2021 Citations: 1
Hierarchical Assembly of MnO 2 Nanosheet on CuCo 2 O 4 Nanoflake over Fabric Scaffold for Symmetric Supercapacitor K Chanda, S Maiti, S Sarkar, P Bairi, S Thakur, K Sardar, N Besra, NS Das, ... ACS Applied Nano Materials 4 (2), 1420-1433 , 2021 2021 Citations: 44
Swagata Roy, Samrat Sarkar, Jiaqiang Xu, Yufeng Zhao, Jiujun Zhang, A review of carbon dots and their composite materials for electrochemical energy technologies Y Liu Carbon Energy 3 (5), 795-826 , 2021 2021 Citations: 4
Sodium‐Ion Batteries: Recent Progress in Advanced Organic Electrode Materials for Sodium‐Ion Batteries: Synthesis, Mechanisms, Challenges and Perspectives (Adv. Funct. Mater … X Yin, S Sarkar, S Shi, QA Huang, H Zhao, L Yan, Y Zhao, J Zhang Advanced Functional Materials 30 (11) , 2020 2020 Citations: 16
Recent progress in advanced organic electrode materials for sodium‐ion batteries: synthesis, mechanisms, challenges and perspectives X Yin, S Sarkar, S Shi, QA Huang, H Zhao, L Yan, Y Zhao, J Zhang Advanced Functional Materials 30 (11), 1908445 , 2020 2020 Citations: 387
Bi 3 TaO 7 film: a promising photoelectrode for photoelectrochemical water splitting Q Song, P Wu, S Sarkar, Y Zhao, Z Liu Dalton Transactions 49 (1), 147-155 , 2020 2020 Citations: 12
Challenges and opportunities for supercapacitors S Huang, X Zhu, S Sarkar, Y Zhao APL materials 7 (10) , 2019 2019 Citations: 585
Flexible, transparent resistive switching device based on topological insulator Bi2Se3- organic composite B Das, PK Sarkar, NS Das, S Sarkar, KK Chattopadhyay JOURNAL OF APPLIED PHYSICS 124 (124503), 124503-1 to 124503-8 , 2018 2018 Citations: 17
Ultrasound assisted catalytic degradation of textile dye under the presence of reduced Graphene Oxide enveloped Copper Phthalocyanine nanotube M Samanta, M Mukherjee, UK Ghorai, S Sarkar, C Bose, ... Applied surface science 449, 113-121 , 2018 2018 Citations: 52
Flower-like Cu 2 NiSnS 4 microspheres for application as electrodes of asymmetric supercapacitors endowed with high energy density S Sarkar, P Howli, UK Ghorai, B Das, M Samanta, NS Das, ... CrystEngComm 20 (10), 1443-1454 , 2018 2018 Citations: 36
Co 3 O 4 Nanowires on Flexible Carbon Fabric as a Binder-Free Electrode for All Solid-State Symmetric Supercapacitor P Howli, S Das, S Sarkar, M Samanta, K Panigrahi, NS Das, ... ACS omega 2 (8), 4216-4226 , 2017 2017 Citations: 96
MOST CITED SCHOLAR PUBLICATIONS
Challenges and opportunities for supercapacitors S Huang, X Zhu, S Sarkar, Y Zhao APL materials 7 (10) , 2019 2019 Citations: 585
Recent progress in advanced organic electrode materials for sodium‐ion batteries: synthesis, mechanisms, challenges and perspectives X Yin, S Sarkar, S Shi, QA Huang, H Zhao, L Yan, Y Zhao, J Zhang Advanced Functional Materials 30 (11), 1908445 , 2020 2020 Citations: 387
A review of carbon dots and their composite materials for electrochemical energy technologies Y Liu, S Roy, S Sarkar, J Xu, Y Zhao, J Zhang Carbon Energy 3 (5), 795-826 , 2021 2021 Citations: 217
Co 3 O 4 Nanowires on Flexible Carbon Fabric as a Binder-Free Electrode for All Solid-State Symmetric Supercapacitor P Howli, S Das, S Sarkar, M Samanta, K Panigrahi, NS Das, ... ACS omega 2 (8), 4216-4226 , 2017 2017 Citations: 96
Novel quaternary chalcogenide/reduced graphene oxide-based asymmetric supercapacitor with high energy density S Sarkar, P Howli, B Das, NS Das, M Samanta, GC Das, ... ACS applied materials & interfaces 9 (27), 22652-22664 , 2017 2017 Citations: 94
Topological Insulator Bi 2 Se 3 /Si-Nanowire-Based p–n Junction Diode for High-Performance Near-Infrared Photodetector B Das, NS Das, S Sarkar, BK Chatterjee, KK Chattopadhyay ACS Applied Materials & Interfaces 9 (27), 22788-22798 , 2017 2017 Citations: 92
Recent progress in amorphous carbon‐based materials for anodes of sodium‐ion batteries: synthesis strategies, mechanisms, and performance S Sarkar, S Roy, Y Hou, S Sun, J Zhang, Y Zhao ChemSusChem 14 (18), 3693-3723 , 2021 2021 Citations: 85
Optical and thermoelectric properties of chalcogenide based Cu2NiSnS4 nanoparticles synthesized by a novel hydrothermal route S Sarkar, B Das, PR Midya, GC Das, KK Chattopadhyay Materials Letters 152, 155-158 , 2015 2015 Citations: 70
Self-sacrificial template directed hydrothermal route to kesterite-Cu 2 ZnSnS 4 microspheres and study of their photo response properties S Sarkar, K Bhattacharjee, GC Das, KK Chattopadhyay CrystEngComm 16 (13), 2634-2644 , 2014 2014 Citations: 65
Recent advances in semimetallic pnictogen (As, Sb, Bi) based anodes for sodium-ion batteries: Structural design, charge storage mechanisms, key challenges and perspectives S Sarkar, S Roy, Y Zhao, J Zhang Nano Research 14 (11), 3690-3723 , 2021 2021 Citations: 63
Defect induced tuning of photoluminescence property in graphitic carbon nitride nanosheets through synthesis conditions D Das, D Banerjee, D Pahari, UK Ghorai, S Sarkar, NS Das, ... Journal of Luminescence 185, 155-165 , 2017 2017 Citations: 59
Interface engineering of FeCo-Co structure as bifunctional oxygen electrocatalyst for rechargeable zinc-air batteries via alloying degree control strategy L Song, J Zhang, S Sarkar, C Zhao, Z Wang, C Huang, L Yan, Y Zhao Chemical Engineering Journal 433, 133686 , 2022 2022 Citations: 53
Pseudo first ordered adsorption of noxious textile dyes by low-temperature synthesized amorphous carbon nanotubes D Banerjee, P Bhowmick, D Pahari, S Santra, S Sarkar, B Das, ... Physica E: Low-Dimensional Systems and Nanostructures 87, 68-76 , 2017 2017 Citations: 53
Ultrasound assisted catalytic degradation of textile dye under the presence of reduced Graphene Oxide enveloped Copper Phthalocyanine nanotube M Samanta, M Mukherjee, UK Ghorai, S Sarkar, C Bose, ... Applied surface science 449, 113-121 , 2018 2018 Citations: 52
Hierarchical Assembly of MnO 2 Nanosheet on CuCo 2 O 4 Nanoflake over Fabric Scaffold for Symmetric Supercapacitor K Chanda, S Maiti, S Sarkar, P Bairi, S Thakur, K Sardar, N Besra, NS Das, ... ACS Applied Nano Materials 4 (2), 1420-1433 , 2021 2021 Citations: 44
Flower-like Cu 2 NiSnS 4 microspheres for application as electrodes of asymmetric supercapacitors endowed with high energy density S Sarkar, P Howli, UK Ghorai, B Das, M Samanta, NS Das, ... CrystEngComm 20 (10), 1443-1454 , 2018 2018 Citations: 36
A novel Mo 8.7 Nb 6.1 O x @NCs egg-nest composite structure as superior anode material for lithium-ion storage: S.-L. Cheng et al. SL Cheng, XP Yin, S Sarkar, ZW Wang, QA Huang, JJ Zhang, YF Zhao Rare Metals 41 (8), 2645-2654 , 2022 2022 Citations: 24
Band edge tuned Zn x Cd 1− x S solid solution nanopowders for efficient solar photocatalysis S Ghosh, S Sarkar, BK Das, D Sen, M Samanta, KK Chattopadhyay Physical chemistry chemical physics 19 (44), 29998-30009 , 2017 2017 Citations: 21
Photocatalytic and sonocatalytic dye degradation by sulfur vacancy rich ZnS nanopowder S Ghosh, M Samanta, D Sen, S Sarkar, S Sarkar, KK Chattopadhyay Journal of Nanoparticle Research 23 (8), 160 , 2021 2021 Citations: 19
rGO-Wrapped flowerlike Bi 2 Se 3 nanocomposite: synthesis, experimental and simulation-based investigation on cold cathode applications B Das, S Sarkar, R Khan, S Santra, NS Das, KK Chattopadhyay RSC advances 6 (31), 25900-25912 , 2016 2016 Citations: 18