Anubhab Dey - Academia.edu (original) (raw)

Uploads

Papers by Anubhab Dey

Research paper thumbnail of Voriconazole and tamsulosin: A clinically relevant drug–drug interaction

Enfermedades infecciosas y microbiologia clinica (English ed.), 2021

Research paper thumbnail of Memristive effects due to charge transfer in graphene gated through ferroelectric CuInP2S6

2D Materials

Ferroelectricity at the nanometre scale can drive the miniaturisation and wide application of fer... more Ferroelectricity at the nanometre scale can drive the miniaturisation and wide application of ferroelectric devices for memory and sensing applications. The two-dimensional van der Waals (2D-vdWs) ferroelectrics CuInP2S6 (CIPS) has attracted much attention due to its robust ferroelectricity found in thin layers at room temperature. Also, unlike many 2D ferroelectrics, CIPS is a wide band gap semiconductor, well suited for use as a gate in field-effect transistors (FETs). Here, we report on a hybrid FET in which the graphene conducting channel is gated through a CIPS layer. We reveal hysteresis effects in the transfer characteristics of the FET, which are sensitive to the gate voltage, temperature and light illumination. We demonstrate charge transfer at the CIPS/graphene interface in the dark and under light illumination. In particular, light induces a photodoping effect in graphene that varies from n- to p-type with increasing temperature. These hybrid FETs open up opportunities fo...

Research paper thumbnail of Ferroelectric semiconductor junctions based on graphene/In2Se3/graphene van der Waals heterostructures

2D Materials, 2021

The miniaturization of ferroelectric devices offers prospects for non-volatile memories, low-powe... more The miniaturization of ferroelectric devices offers prospects for non-volatile memories, low-power electrical switches and emerging technologies beyond existing Si-based integrated circuits. An emerging class of ferroelectrics is based on van der Waals (vdW) two-dimensional materials with potential for nano-ferroelectrics. Here, we report on ferroelectric semiconductor junctions (FSJs) in which the ferroelectric vdW semiconductor α-In2Se3 is embedded between two single-layer graphene electrodes. In these two-terminal devices, the ferroelectric polarization of the nanometre-thick In2Se3 layer modulates the transmission of electrons across the graphene/In2Se3 interface, leading to memristive effects that are controlled by applied voltages and/or by light. The underlying mechanisms of conduction are examined over a range of temperatures and under light excitation revealing thermionic injection, tunnelling and trap-assisted transport. These findings are relevant to future developments o...

Research paper thumbnail of Unconventional Redox Active Gate Dielectrics to Fabricate High Performance Organic Thin-film Transistors

ACS Applied Electronic Materials, 2019

Research paper thumbnail of Studies on temperature dependence of current-voltage characteristics of glancing angle deposited indium oxide nanowire on silicon substrate

The 1D perpendicular In2-xO3-y nanostructure arrays have been synthesized by using glancing angle... more The 1D perpendicular In2-xO3-y nanostructure arrays have been synthesized by using glancing angle deposition (GLAD) technique. A low deposition rate of 0.5 A°/S produced highly porous structure. The current - voltage characteristics for the In2-xO3-ynanocolumnar array based were measured through a gold Schottky contact at different temperatures. The temperature dependent ideality factor was calculated from the observed current – voltage characteristics. The ideality factor was found to vary from 4.19 to 2.75 with a variation in temperature from 313 K to 473 K.

Research paper thumbnail of An audit of antibiotic dosing according to renal function or renal replacement therapy in critical care

Research paper thumbnail of Drosophila melanogaster: A Veritable Genetic Tool and in vivo Model for Human Alzheimer’s Disease

Journal of Pharmaceutical Research International, 2019

The rise in the cases of neurodegenerative diseases, such as the familial forms of Alzheimer’s di... more The rise in the cases of neurodegenerative diseases, such as the familial forms of Alzheimer’s disease is worrisome and a burden to many societies in our ever-increasing world. Due to the complexity in the nature of the brain and spinal cord characterized by an extremely organized network of neuronal cells, there is a need to answer scientific inquiries in uncomplicated, though similar, systems. Drosophila melanogaster (fruit-fly) is a well-studied and easily managed genetic model organism used for discerning the molecular mechanisms of many human diseases. There are strong conservations of several basic biological, physiological and neurological features between D. melanogaster and mammals, as about 75% of all human disease-causing genes are considered to possess a functional homolog in the fruit-fly. The development of Drosophila models of several neurodegenerative disorders via developed transgenic technologies has presented spectacular similarities to human diseases. An advantag...

Research paper thumbnail of Voriconazole and tamsulosin: A clinically relevant drug–drug interaction

Enfermedades infecciosas y microbiologia clinica (English ed.), 2021

Research paper thumbnail of Memristive effects due to charge transfer in graphene gated through ferroelectric CuInP2S6

2D Materials

Ferroelectricity at the nanometre scale can drive the miniaturisation and wide application of fer... more Ferroelectricity at the nanometre scale can drive the miniaturisation and wide application of ferroelectric devices for memory and sensing applications. The two-dimensional van der Waals (2D-vdWs) ferroelectrics CuInP2S6 (CIPS) has attracted much attention due to its robust ferroelectricity found in thin layers at room temperature. Also, unlike many 2D ferroelectrics, CIPS is a wide band gap semiconductor, well suited for use as a gate in field-effect transistors (FETs). Here, we report on a hybrid FET in which the graphene conducting channel is gated through a CIPS layer. We reveal hysteresis effects in the transfer characteristics of the FET, which are sensitive to the gate voltage, temperature and light illumination. We demonstrate charge transfer at the CIPS/graphene interface in the dark and under light illumination. In particular, light induces a photodoping effect in graphene that varies from n- to p-type with increasing temperature. These hybrid FETs open up opportunities fo...

Research paper thumbnail of Ferroelectric semiconductor junctions based on graphene/In2Se3/graphene van der Waals heterostructures

2D Materials, 2021

The miniaturization of ferroelectric devices offers prospects for non-volatile memories, low-powe... more The miniaturization of ferroelectric devices offers prospects for non-volatile memories, low-power electrical switches and emerging technologies beyond existing Si-based integrated circuits. An emerging class of ferroelectrics is based on van der Waals (vdW) two-dimensional materials with potential for nano-ferroelectrics. Here, we report on ferroelectric semiconductor junctions (FSJs) in which the ferroelectric vdW semiconductor α-In2Se3 is embedded between two single-layer graphene electrodes. In these two-terminal devices, the ferroelectric polarization of the nanometre-thick In2Se3 layer modulates the transmission of electrons across the graphene/In2Se3 interface, leading to memristive effects that are controlled by applied voltages and/or by light. The underlying mechanisms of conduction are examined over a range of temperatures and under light excitation revealing thermionic injection, tunnelling and trap-assisted transport. These findings are relevant to future developments o...

Research paper thumbnail of Unconventional Redox Active Gate Dielectrics to Fabricate High Performance Organic Thin-film Transistors

ACS Applied Electronic Materials, 2019

Research paper thumbnail of Studies on temperature dependence of current-voltage characteristics of glancing angle deposited indium oxide nanowire on silicon substrate

The 1D perpendicular In2-xO3-y nanostructure arrays have been synthesized by using glancing angle... more The 1D perpendicular In2-xO3-y nanostructure arrays have been synthesized by using glancing angle deposition (GLAD) technique. A low deposition rate of 0.5 A°/S produced highly porous structure. The current - voltage characteristics for the In2-xO3-ynanocolumnar array based were measured through a gold Schottky contact at different temperatures. The temperature dependent ideality factor was calculated from the observed current – voltage characteristics. The ideality factor was found to vary from 4.19 to 2.75 with a variation in temperature from 313 K to 473 K.

Research paper thumbnail of An audit of antibiotic dosing according to renal function or renal replacement therapy in critical care

Research paper thumbnail of Drosophila melanogaster: A Veritable Genetic Tool and in vivo Model for Human Alzheimer’s Disease

Journal of Pharmaceutical Research International, 2019

The rise in the cases of neurodegenerative diseases, such as the familial forms of Alzheimer’s di... more The rise in the cases of neurodegenerative diseases, such as the familial forms of Alzheimer’s disease is worrisome and a burden to many societies in our ever-increasing world. Due to the complexity in the nature of the brain and spinal cord characterized by an extremely organized network of neuronal cells, there is a need to answer scientific inquiries in uncomplicated, though similar, systems. Drosophila melanogaster (fruit-fly) is a well-studied and easily managed genetic model organism used for discerning the molecular mechanisms of many human diseases. There are strong conservations of several basic biological, physiological and neurological features between D. melanogaster and mammals, as about 75% of all human disease-causing genes are considered to possess a functional homolog in the fruit-fly. The development of Drosophila models of several neurodegenerative disorders via developed transgenic technologies has presented spectacular similarities to human diseases. An advantag...

Log In