Papers by Dr. Joydip Sengupta
Early detection of cancer utilizing biosensors based on “Green Graphene”: An innovative and sustainable methodology for advancing cancer diagnosis
TrAC Trends in Analytical Chemistry, Sep 30, 2023
Graphene Transistor-based Biosensors for Rapid Detection of SARS-CoV-2
Bioelectrochemistry, Mar 31, 2024
Carbon Nanotube Fabrication at Industrial Scale: Opportunities and Challenges
arXiv (Cornell University), 2018
Abstract Careful research on different materials reveals that the material properties are mostly ... more Abstract Careful research on different materials reveals that the material properties are mostly affected by the size of it. Material size down to nanometer scale exhibits some remarkable properties, resulting in unique physical and chemical characteristics. In today’s world of nanotechnology, carbon nanotubes (CNTs) have become a high priority material because of their exclusive structure, novel characteristics with enormous potential in many technological applications. Till date chemical vapor deposition (CVD) is the preferred and widely used technique among different CNT growth methods, because of its potential advantage to produce CNTs of high purity, large yield with ease of scale up and low setup cost. This article provides an overview of different CVD methods for industrial scale fabrication of CNTs. The influence of material aspect, viz. catalyst type, catalyst support, and growth control aspect, viz. process temperature, pressure, catalyst concentration, are discussed. Additionally, possible growth mechanisms concerning CNT formation are described. Finally, the key challenges of the process are addressed with future perspective.
Different Synthesis Routes of Graphene-Based Metal Nanocomposites
Springer eBooks, 2021
Nanocomposite material proves to be the best candidate to match todays technological need as fasc... more Nanocomposite material proves to be the best candidate to match todays technological need as fascinating properties can be achieved by combining two or more nanomaterials. Among various nanomaterials, graphene is able to stand out far ahead of all others because of its novel structure and exclusive characteristics. In particular, graphene metal nanocomposites have attracted enormous interest for their prospective use in various fields, including electronics and electrical and energy related areas. However, for the utmost use of potential of graphene, it has to be homogenously embedded into metal matrices. Thus, appropriate synthesis route is decisive to obtain graphene metal nanocomposites with desired properties. This chapter will summarize the different synthesis routes of high quality graphene metal nanocomposites along with their current developments.
Green Synthesis of Metal Oxide Nanoparticles
Springer eBooks, 2022
Elsevier eBooks, 2021
The depletion of natural energy sources demands non-conventional efficient alternatives with sust... more The depletion of natural energy sources demands non-conventional efficient alternatives with sustainable utility. The outstanding performance of nanomaterials resolves the energy scarcity issue through the introduction of small-scale, energy-harvesting devices, called nanogenerators. A nanogenerator is an ambient energy-harvester with exotic features of being a lightweight, sustainable and stand-alone device which promises efficient utilization of energy. Conversion of mechanical/thermal energy into electricity is the basic working principle of a nanogenerator. The nanogenerators employ piezoelectric or triboelectric properties of a material to harvest electrical energy from mechanical energy whereas for the generation of electrical energy from thermal energy the pyroelectric or thermoelectric properties are utilized. The unique and variant range of applicability of nanogenerators makes them increasingly popular among the scientific communities having interdisciplinary research interests. Nanogenerators are employed successfully in different energy sectors such as solar energy, water (blue) energy, wind energy and many more. The present chapter will summarize the fundamentals of different types of nanogenerators along with their applicability in harvesting blue energy. This is a post print which is published in "Nano Tools and Devices for Enhanced Renewable Energy " with
Mikrochimica Acta, Apr 5, 2022
At present, analytical lab-on-chip devices find their usage in different facets of chemical analy... more At present, analytical lab-on-chip devices find their usage in different facets of chemical analysis, biological analysis, point of care analysis, biosensors, etc. In addition, graphene has already established itself as an essential component of advanced lab-on-chip devices. Graphene-based lab-on-chip devices have achieved appreciable admiration because of their peerless performance in comparison to others. However, to accomplish a sustainable future, a device must undergo "green screening" to check its environmental compatibility. Thus, extensive research is carried out globally to make the graphene-based lab-on-chip green, though it is yet to be achieved. Nevertheless, as a ray of hope, there are few existing strategies that can be stitched together for feasible fabrication of environment-friendly green graphene-based analytical lab-on-chip, and those prospective pathways are reviewed in this paper. Keywords Lab-on-chip (LOC) • Biodegradable material • Graphene • Green technology • Sustainability • Commercialization Highlights • The advances and approaches of green graphene-based chip devices that have been adopted and executed in past decades are audited. • The possibilities of using biodegradable/biocompatible materials as the base material of green graphene-based lab on chip devices are explored, and the development of the green synthesis of graphene is assessed in detail. • The feasibility of using green solvents, green power management, and green waste management was analyzed. • Possibilities of commercialization also have been probed.
Trends in Analytical Chemistry, May 1, 2019
Since last decade, graphene has materialized itself as one of the phenomenal materials to modern ... more Since last decade, graphene has materialized itself as one of the phenomenal materials to modern researchers because of its remarkable thermal, optical, electronic, and mechanical properties. Graphene holds enormous potentials for lab on chip (LOC) devices and can provide diverse fabrication routes and structural features due to their special electronic and electrochemical properties. A LOC device can manipulate fluids using microchannels and chamber structures, to accomplish fast, highly sensitive and inexpensive analysis with high yield. Hence, the graphene based LOC devices can constitute a wellcontrolled microenvironment for both advanced chemical/biological evaluation and low-cost point-ofcare analysis etc. This review critically debates the graphene as a prime candidate for microfluidic devices and their future applicability towards various practical applications. Finally, the opportunities and challenges for the future of graphene with respect to their commercial challenges and sustainability perspectives are discussed.
Carbon trends, 2021
The rapid outbreaks of lethal viruses necessitate the development of novel antiviral substance. B... more The rapid outbreaks of lethal viruses necessitate the development of novel antiviral substance. Besides the conventional antiviral substances, biocompatible nanomaterials also have significant potential in combating the virus at various stages of infection. Carbon nanomaterials have an impressive record against viruses and can deal with many crucial healthcare issues. In accordance with the published literature, biocompatible carbon nanomaterials have a promising prospect as an antiviral substance. Subsequently, the antiviral properties of different carbon nanomaterials namely fullerene, carbon nanotube, carbon dot and graphene oxide have been reviewed.
Materials Letters, Sep 1, 2012
A comparative study of the physical properties of undoped Zinc Oxide (ZnO) and Al doped Zinc Oxid... more A comparative study of the physical properties of undoped Zinc Oxide (ZnO) and Al doped Zinc Oxide (AZO) thin films were performed as a function of annealing temperature. The structural properties were analyzed using X-ray diffraction and the recorded patterns indicated that the crystallinity of the films always enhanced with increasing annealing temperature while it degrades with Al doping. The topographical modification of the films due to heat treatment was examined by atomic force microscopy which revealed that annealing roughened the surface of all the films; however the AZO films always exhibited smoother morphology than ZnO. Study of optical properties by UV-Visible spectrophotometer demonstrated that the transmittance was gradually diminished with rise in annealing temperature. In addition, a notable increase in the optical bandgap was also observed for the AZO films.
Nanomaterials, Nov 23, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Nanomaterials, Sep 10, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Bulletin of Materials Science, Apr 1, 2009
Growth of carbon nanotubes (CNTs) was performed by atmospheric pressure chemical vapour depositio... more Growth of carbon nanotubes (CNTs) was performed by atmospheric pressure chemical vapour deposition (APCVD) of propane on Si(111) with a pre-treated Ni overlayer acting as a catalyst. Prior to the growth of CNTs, a thin film of Ni was deposited on Si(111) substrate by evaporation and heat treated at 900°C. The growth of nanotubes was carried out at 850°C using propane as a source of carbon. Distribution of the catalyst particles over the Si substrate was analysed before and after heat treatment by atomic force microscopy (AFM). The X-ray diffraction (XRD) pattern of the grown material revealed that they are graphitic in nature. Field emission scanning electron microscopy (FESEM) was used to investigate the growth process and it was found that a catalytic particle was always situated at the tip of the tube thus implying a tip growth mechanism. Evidence for the presence of radial breathing mode from multi-wall nanotubes (MWNTs) in the grown sample was obtained from micro-Raman analysis. Finally, high-resolution transmission electron microscopic (HRTEM) analysis confirmed that the graphene layers of the CNTs are well ordered with typical 0⋅34 nm spacing.
Materials, Jan 25, 2023
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Biomolecules
An essential aspect of successful cancer diagnosis is the identification of malignant tumors duri... more An essential aspect of successful cancer diagnosis is the identification of malignant tumors during the early stages of development, as this can significantly diminish patient mortality rates and increase their chances of survival. This task is facilitated by cancer biomarkers, which play a crucial role in determining the stage of cancer cells, monitoring their growth, and evaluating the success of treatment. However, conventional cancer detection methods involve several intricate steps, such as time-consuming nucleic acid amplification, target detection, and a complex treatment process that may not be appropriate for rapid screening. Biosensors are emerging as promising diagnostic tools for detecting cancer, and carbon nanotube (CNT)- and graphene-based transistor biosensors have shown great potential due to their unique electrical and mechanical properties. These biosensors have high sensitivity and selectivity, allowing for the rapid detection of cancer biomarkers at low concentr...
Inorganics
COVID-19, a viral respiratory illness, is caused by Severe Acute Respiratory Syndrome Corona Viru... more COVID-19, a viral respiratory illness, is caused by Severe Acute Respiratory Syndrome Corona Virus 2 (SARS-CoV-2), which was first identified in Wuhan, China, in 2019 and rapidly spread worldwide. Testing and isolation were essential to control the virus’s transmission due to the severity of the disease. In this context, there is a global interest in the feasibility of employing nano-biosensors, especially those using graphene as a key material, for the real-time detection of the virus. The exceptional properties of graphene and the outstanding performance of nano-biosensors in identifying various viruses prompted a feasibility check on this technology. This paper focuses on the recent advances in using graphene-based electrochemical biosensors for sensing the SARS-CoV-2 virus. Specifically, it reviews various types of electrochemical biosensors, including amperometric, potentiometric, and impedimetric biosensors, and discusses the current challenges associated with biosensors for S...
Nanomaterials
It has been proven that viral infections pose a serious hazard to humans and also affect social h... more It has been proven that viral infections pose a serious hazard to humans and also affect social health, including morbidity and mental suffering, as illustrated by the COVID-19 pandemic. The early detection and isolation of virally infected people are, thus, required to control the spread of viruses. Due to the outstanding and unparalleled properties of nanomaterials, numerous biosensors were developed for the early detection of viral diseases via sensitive, minimally invasive, and simple procedures. To that aim, viral detection technologies based on carbon nanotubes (CNTs) are being developed as viable alternatives to existing diagnostic approaches. This article summarizes the advancements in CNT-based biosensors since the last decade in the detection of different human viruses, namely, SARS-CoV-2, dengue, influenza, human immunodeficiency virus (HIV), and hepatitis. Finally, the shortcomings and benefits of CNT-based biosensors for the detection of viruses are outlined and discussed.
Nanomaterials
Graphene achieved a peerless level among nanomaterials in terms of its application in electronic ... more Graphene achieved a peerless level among nanomaterials in terms of its application in electronic devices, owing to its fascinating and novel properties. Its large surface area and high electrical conductivity combine to create high-power batteries. In addition, because of its high optical transmittance, low sheet resistance, and the possibility of transferring it onto plastic substrates, graphene is also employed as a replacement for indium tin oxide (ITO) in making electrodes for touch screens. Moreover, it was observed that graphene enhances the performance of transparent flexible electronic modules due to its higher mobility, minimal light absorbance, and superior mechanical properties. Graphene is even considered a potential substitute for the post-Si electronics era, where a high-performance graphene-based field-effect transistor (GFET) can be fabricated to detect the lethal SARS-CoV-2. Hence, graphene incorporation in electronic devices can facilitate immense device structure/...
Electro‐Optic Switches
Optical Switching
Microchimica Acta, 2022
At present, analytical lab-on-chip devices find their usage in different facets of chemical analy... more At present, analytical lab-on-chip devices find their usage in different facets of chemical analysis, biological analysis, point of care analysis, biosensors, etc. In addition, graphene has already established itself as an essential component of advanced lab-on-chip devices. Graphene-based lab-on-chip devices have achieved appreciable admiration because of their peerless performance in comparison to others. However, to accomplish a sustainable future, a device must undergo "green screening" to check its environmental compatibility. Thus, extensive research is carried out globally to make the graphene-based lab-on-chip green, though it is yet to be achieved. Nevertheless, as a ray of hope, there are few existing strategies that can be stitched together for feasible fabrication of environment-friendly green graphene-based analytical lab-on-chip, and those prospective pathways are reviewed in this paper. Keywords Lab-on-chip (LOC) • Biodegradable material • Graphene • Green technology • Sustainability • Commercialization Highlights • The advances and approaches of green graphene-based chip devices that have been adopted and executed in past decades are audited. • The possibilities of using biodegradable/biocompatible materials as the base material of green graphene-based lab on chip devices are explored, and the development of the green synthesis of graphene is assessed in detail. • The feasibility of using green solvents, green power management, and green waste management was analyzed. • Possibilities of commercialization also have been probed.
Uploads
Papers by Dr. Joydip Sengupta