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Your search keyword '"Chattopadhyay, A. K."' showing total 135 results
Start Over Author "Chattopadhyay, A. K." Publication Type Conference Materials
135 results on '"Chattopadhyay, A. K."'

19. Impact of Morphological Change on Improvement of Photo-catalytic Behavior of Co3O4 Based System.

Author

Mitra, Dipanwita, Sarkar, Ratna, Chattopadhyay, K. K., and Chattopadhyay, Paramita

Subjects
INFRARED absorption, FIELD emission electron microscopy, LIGHT absorption, VISIBLE spectra, SEWAGE, TRADE routes
Abstract

Porous Co3O4 nano-spike structure was synthesized by the hydrothermal route and commercial extra pure Co3O4 nanoparticle was purchased from FINAR Reagents. The crystallinity of the samples was analyzed by X-ray diffraction (XRD). The morphological variations were investigated by Field Emission Scanning Electron Microscopy (FESEM) and the optical properties were analyzed by the UV-VIS-NIR spectrophotometry. It was found that Co3O4 porous nano-spike structure shows an enhanced optical absorption within the visible-near infrared region as compared to the irregular shaped commercial Co3O4 nanoparticle. In the study, photocatalytic activity of the samples having different morphology was investigated in Rhodamine B (RhB) under visible light irradiation. The morphological variation in the Co3O4 material improves the photocatalytic activity significantly under visible light irradiation. The porous Co3O4 nano-spike shows an efficient photocatalytic performance to utilize it in waste water remediation. [ABSTRACT FROM AUTHOR]

Published
2020
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21. Abstract 4118: Molecular cytometry for immunotherapy trials

Author

Lomas, Woodrow E., primary, Winters, Aidan F., additional, Alexandre, Jason, additional, Martin, Jody, additional, Bansal, Nidhanjali, additional, Nakamoto, Margaret, additional, Gaylord, Brent, additional, Saksena, Suraj, additional, and Chattopadhyay, Pratip K., additional

Published
2019
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24. Harmonics Of Drift Tearing Modes In ADITYA Tokamak

Author

Ghosh, Joydeep, primary, Raj, Harshita, additional, Tanna, R. L., additional, Macwan, Tanmay, additional, Kumar, R., additional, Aich, S., additional, Chattopadhyay, P. K., additional, Jadeja, K. A., additional, Patel, K., additional, Raju, D., additional, Jha, S., additional, Atrey, P. K., additional, Nagora, U., additional, Sen, A., additional, Bisai, N., additional, Pal, R., additional, and Team, Aditya, additional

Published
2019
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45. Room temperature solution processed low dimensional CH3NH3PbI3 NIR detector.

Author

Besra, N., Paul, T., Sarkar, P. K., Thakur, S., Sarkar, S., Das, A., Chanda, K., Sardar, K., Chattopadhyay, K. K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer

Subjects
OPTOELECTRONIC devices, DETECTORS, LEAD halides, SOLAR cells, METAL halides
Abstract

Metal halide perovskites have recently drawn immense research interests among the worldwide scientific community due to their excellent light harvesting capabilities and above all, cost effectiveness. These new class of materials have already been used as efficient optoelectronic devices e.g. solar cells, photo detectors, etc. Here in this work, room temperature NIR (near infra red) response of organic-inorganic lead halide perovskite CH3NH3PbI3 (Methylammonium lead tri iodide) nanorods has been studied. A very simple solution process technique has been adopted to synthesize CH3NH3PbI3 nanostructures at room temperature. The NIR exposure upon the sample resulted in a considerable hike in its dark current with very good responsivity (0.37 mA/W). Along with that, a good on-off ratio (41.8) was also obtained when the sample was treated under a pulsed NIR exposure with operating voltage of 2 V. The specific detectivity of the device came in the order of 1010 Jone. [ABSTRACT FROM AUTHOR]

Published
2018
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46. Hierarchical heterostructure of MoS2 flake anchored on TiO2 sphere for supercapacitor application.

Author

Chanda, K., Thakur, S., Maiti, S., Acharya, A., Paul, T., Besra, N., Sarkar, S., Das, A., Sardar, K., Chattopadhyay, K. K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer

Subjects
SPHERES, DENSITY currents, SURFACE area
Abstract

Hierarchical architectures realized via rational coupling of several components not only boast synergy driven raised functionality compared to their structural constituents also exhibit noble interface phenomena, thus made them significantly pertinent from research and technological point of view. Here in, geometrically intricate hierarchical nanoform constituting MoS2 nanoflakes anchored on TiO2 sphere was realized via two steps hydrothermal protocol. Initially TiO2 sphere was synthesized using titanium isopropoxide assisted hydrothermal route followed by which the sphere was used as scaffold for secondary growth of MoS2. As synthesized hybrid sample displayed much improved electrochemical behavior than pristine TiO2 sphere. Assessed value of specific capacitance for the hybrid is found to 152.22 F/g at current density of 0.1A/g which is 30 fold than TiO2 sphere. This electrochemical performance enhancement can be accredited to high surface area of the hybrid sample. [ABSTRACT FROM AUTHOR]

Published
2018
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47. Luminescence behaviour of room temperature chemical processed all-inorganic CsPbCl3 perovskite cubes.

Author

Paul, T., Chatterjee, B. K., Maiti, S., Besra, N., Thakur, S., Sarkar, S., Chanda, K., Das, A., Sarkar, P. K., Sardar, K., Chattopadhyay, K. K., Shekhawat, Manoj Singh, Bhardwaj, Sudhir, and Suthar, Bhuvneshwer

Subjects
CHEMICAL processes, FIELD emission electron microscopes, CUBES, NANOELECTROMECHANICAL systems, LEAD halides, CATHODOLUMINESCENCE, PHOTOLUMINESCENCE
Abstract

All inorganic perovskites with different halide constituent have recently truncated the eyes of researchers owing to their intriguing optoelectronic features and thereby their usage perspective in photovoltaic applications, light emitting didoes and lasing devices. Here, adopting a simple, environment benign ambient conditioned chemical synthesis approach we have realized high quality cesium lead halide perovskite (CsPbCl3) cube. The crystallinity and morphological characterizations were performed by X-ray diffraction and field emission scanning electron microscope measurements respectively while the chemical composition were examined via energy-dispersive X-ray spectroscopic measurement. The as synthesized cubes crystallized in cubic phase and exhibited intense photoluminescence emission at ∼418 nm with a small FWHM value and prolonged photoluminescence decay time∼41 ns. Besides photoluminescence, these cubes displayed strong cathodoluminescence also. Accelerating voltage dependent cathodoluminescence study showed discernable differences in luminescence behaviour. We expect this synthetic strategy to be promising as it can be easily scaled up to produce bulk quantity nanoforms of different inorganic perovskites in subtle manner for the realization of several types of nanoscale devices. [ABSTRACT FROM AUTHOR]

Published
2018
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