Asim K. Ray

ORCID: 0000-0002-5392-0041
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About
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Research Areas
  • Porphyrin and Phthalocyanine Chemistry
  • Particle physics theoretical and experimental studies
  • Analytical Chemistry and Sensors
  • Organic Electronics and Photovoltaics
  • Quantum Chromodynamics and Particle Interactions
  • Conducting polymers and applications
  • Semiconductor materials and devices
  • Thin-Film Transistor Technologies
  • Neutrino Physics Research
  • Gas Sensing Nanomaterials and Sensors
  • Semiconductor materials and interfaces
  • Transition Metal Oxide Nanomaterials
  • Advanced Memory and Neural Computing
  • Dark Matter and Cosmic Phenomena
  • Molecular Junctions and Nanostructures
  • ZnO doping and properties
  • Lipid Membrane Structure and Behavior
  • Electrochemical sensors and biosensors
  • Chalcogenide Semiconductor Thin Films
  • Graphene research and applications
  • Photochemistry and Electron Transfer Studies
  • Solid-state spectroscopy and crystallography
  • Electrochemical Analysis and Applications
  • Black Holes and Theoretical Physics
  • Nanowire Synthesis and Applications

Brunel University of London
2013-2022

AstraZeneca (Sweden)
2011-2020

Queen Mary University of London
2009-2020

Homi Bhabha National Institute
2018-2019

Bhabha Atomic Research Centre
2008-2019

University of East Anglia
2008-2018

Savitribai Phule Pune University
2018

Norwich Research Park
2018

Royal Holloway University of London
2017

Universidad de Londres
2014

Synergetic combination of the properties phthalocyanines and metal nanoparticles is known to result in improvement various their hybrid materials. This review provides an overview application materials based on for development chemiresistive electrochemical sensors, with a focus methods approaches preparation.

10.1149/2162-8777/ab9fe8 article EN cc-by-nc-nd ECS Journal of Solid State Science and Technology 2020-01-08

This paper presents time-resolved adsorption behavior of lysozyme, bovine serum albumin (BSA), and immunogamma globulin (IgG) onto a liquid crystal phthalocyanine surface concentrates on the kinetic, viscoelastic variation, interfacial hydration, structural details obtained by quartz microbalance dissipating monitoring (QCM-D) technique with Voigt model. The rate for lysozyme is faster than that BSA IgG. Freundlich model can explain isotherm whereas an exponential growth describe Layer...

10.1021/jp800975t article EN The Journal of Physical Chemistry C 2008-07-15

Bottom-gate, bottom-contact organic thin film transistors (OTFTs) were fabricated using solvent soluble copper 1,4,8,11,15,18,22,25-octakis(hexyl)phthalocyanine as the active semiconductor layer. The compound was deposited 70 nm thick spin-coated films onto gold source–drain electrodes supported on octadecyltrichlorosilane treated 250 SiO2 gate insulators. performance of OTFTs optimised by investigating effects vacuum annealing at temperatures between 50 °C and 200 °C, a range that included...

10.1039/c2jm33301e article EN Journal of Materials Chemistry 2012-01-01

This report, prepared for the Community Planning Study - Snowmass 2013 summarizes theoretical motivations and experimental efforts to search baryon number violation, focussing on nucleon decay neutron-antineutron oscillations. Present future experiments using large underground detectors, as well planned oscillation with free neutron beams are highlighted.

10.48550/arxiv.1311.5285 preprint EN other-oa arXiv (Cornell University) 2013-01-01

The detection sensitivity of silver nanoparticle (AgNP)-tagged goat immunoglobulin G (gIgG) microarrays was investigated by studying surface plasmon resonance (SPR) images captured in the visible wavelength range with help a Kretchmann-configured optical coupling set-up. functionalization anti-gIgG molecules on AgNP studied using transmission electron microscopy, photon correlation measurements and UV–visible absorption spectroscopy. A value 1.3 × 10 7 M −1 obtained for antibody–antigen...

10.1098/rsif.2010.0747 article EN Journal of The Royal Society Interface 2011-02-16

From an exposure of the BNL 30-in. deuterium-filled bubble chamber to a 600-MeV/c ${K}^{+}$ beam, angular distribution (14 912 events) and polarization (853 double-scattered for charge-exchange reaction have been obtained. The results partial-wave analyses data indicate dominance positive ${P}_{\frac{1}{2}}$ phase shift, consequently establish $T=0$ Yang-type solution.

10.1103/physrev.183.1183 article EN Physical Review 1969-07-25

Fifteen-layered graphene films have been successfully deposited onto flexible substrates using a commercial ink consisting of particles dispersed in an acrylic polymer binder. A value was obtained for the density defects, primarily located at flake edges, from ratio D and G Raman peaks respectively. thick drop-cast on interdigitated silver electrodes exhibited Ohmic conduction with small activation energy 12 meV over temperature range to The photo-thermoelectric effect is believed be...

10.1088/2053-1583/aa50f0 article EN cc-by 2D Materials 2016-12-19

Solution-processed films of 1,4,8,11,15,18,22,25-octakis(hexyl) copper phthalocyanine (CuPc6) were utilized as an active semiconducting layer in the fabrication organic field-effect transistors (OFETs) bottom-gate configurations using chemical vapour deposited silicon dioxide (SiO2) gate dielectrics. The surface treatment dielectric with a self-assembled monolayer octadecyltrichlorosilane (OTS) resulted values 4×10−2 cm2 V−1 s−1 and 106 for saturation mobility on/off current ratio,...

10.1088/1468-6996/12/2/025001 article EN cc-by-nc Science and Technology of Advanced Materials 2011-03-01

Muscle atrophy and cachexia are common comorbidities among patients suffering from cancer, chronic obstructive pulmonary disease, several other diseases. The peptide hormone ghrelin exerts pleiotropic effects including the stimulation of growth secretion subsequent increase insulin-like factor-1 levels, an important mediator muscle repair. Ghrelin also acts on inflammation, appetite, adipogenesis therefore has been considered a promising therapeutic target for catabolic conditions. We...

10.1021/acs.jmedchem.0c00828 article EN Journal of Medicinal Chemistry 2020-08-12

Titanium dioxide thin films were prepared by spin coating of sol precursor onto microscopic glass slides, silicon and indium tin oxide (ITO) coated substrates. Spin speed was varied between 1000 6000 rpm. From the morphological analysis, it is found that spun with ω⩽4000 rpm assume higher ordered structure than those at a 4000 Conduction low voltages believed to be variable range hopping temperatures T<220 K while ionization donors situated Ea = 0.46 eV below conduction band edge becomes...

10.1088/0022-3727/36/9/310 article EN Journal of Physics D Applied Physics 2003-04-16

10.1016/j.medengphy.2006.04.004 article EN Medical Engineering & Physics 2006-10-03

Electrochromic properties of spun films bis[octakis(hexylthio)phthalocyaninato] dysprosium(III) were investigated for determining nicotinamide adenine dinucleotide hydride (NADH) in water solutions. A spin-coated film deposited on indium tin oxide electrode displays only one redox couple (at E1/2=0.78V). The [(C6H13S)8Pc]2Dy modified chemically or electrochemically the detection reduced NADH solution. oxidized ([(C6H13S)8Pc]2Dy)+ form is believed to be its neutral interaction with NADH.

10.1098/rsif.2007.1241 article EN Journal of The Royal Society Interface 2007-10-30
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