Browsing Department of Physics by Title

Now showing items 1-20 of 756

100 year anniversary Measurement Science and Technology logo. Purpose-led Publishing logo. A reverse electrochemical floating-layer technique of SPM tip preparation

Gangopadhyay, Subhashis (IOP, 2000)

An experimental set-up involving a combination of reverse electrochemical etching and the floating-layer technique of tip preparation is presented. In the model only dc bias is used, avoiding the shortcomings of ac bias. ...
14 Ultrathin films of nanomaterials: a lyotropic liquid crystalline system and its sensing application

Gupta, Raj Kumar; Manjuladevi, V. (De Gruyter, 2021)

The ultrathin films of nanomaterials provide remarkable features that can be potentially employed for efficient device fabrication. In this chapter, an overview of ultrathin films of nanomaterials at different interfaces, ...
3D Graphene-Based Optical Sensors

Gupta, Raj Kumar; Manjuladevi, V. (Springer, 2023-07)

3D graphene (3DG) has been utilized as a functional material for the development of gas and chemical sensors. The sensor based on optical phenomena such as surface plasmon resonance (SPR) offers label-free measurements at ...
The 8th workshop on high energy physics phenomenology (WHEPP-8) was held at the Indian Institute of Technology, Mumbai, India during January 5–16, 2004. One of the four working groups, group III was dedicated to QCD and heavy ion physics (HIC). The present manuscript gives a summary of the activities of group III during the workshop (see also [1] for completeness). The activities of group III were focused to understand the collective behaviours of the system formed after the collisions of two nuclei at ultra-relativistic energies from the interactions of the elementary degrees of freedom, i.e. quarks and gluons, governed by non-abelian gauge theory, i.e. QCD. This was initiated by two plenary talks on experimental overview of heavy ion collisions and lattice QCD and several working group talks and discussions.

Layek, Biswanath (Springer, 2003-11)

We show that cosmic strings moving through the plasma at the time of a first-order quark-hadron transition in the early universe generate baryon inhomogeneities, which can survive till the nucleosynthesis epoch. We find ...
A04-0580 - Na3Zr2Si2PO12-Polymer Hybrid Composites for Solid-State Supercapacitor Applications

Dalvi, Anshuman (IMCS 2020, 2020-05)

Various Na+ ions conducting composite polymer electrolytes have been developed in last three decades, but their application is limited due to poor ionic conductivity near room temperature. Recently, we have demonstrated ...
Adiabatic modulation of driving protocols in periodically driven quantum systems

Sarkar, Tapomoy Guha; Bandyopadhyay, Jayendra N. (ARXIV, 2024-04)

We consider a periodically driven system where the high-frequency driving protocol consists of a sequence of potentials switched on and off at different instants within a period. We explore the possibility of introducing ...
Adsorbate induced self-ordering of germanium nanoislands on Si(113)

Gangopadhyay, Subhashis (IOP, 2007-10)

The impact of Ga preadsorption on the spatial correlation of nanoscale three-dimensional (3D) Ge-islands has been investigated by low-energy electron microscopy and low-energy electron diffraction. Submonolayer Ga adsorption ...
Adsorption of highly charged Gaussian polyelectrolytes onto oppositely charged surfaces

Dutta, Sandipan (AIP, 2016-03)

In many biological processes highly charged biopolymers are adsorbed onto oppositely charged surfaces of macroions and membranes. They form strongly correlated structures close to the surface which cannot be explained by ...
AFM studies of polycrystalline calcium sulfide thin films grown by atomic layer deposition

Dey, Srijata (Elsevier, 1999-04)

Polycrystalline CaS thin films were grown on Al2O3 films deposited on Si-wafer using the atomic layer deposition (ALD) technique. The surface structure of these films was studied by AFM and compared with respective SEM ...
AFM studies on Langmuir-Blodgett films of cholesterol

Gupta, Raj Kumar (Springer, 2004)

The Langmuir monolayer of cholesterol at the air-water interface exhibits a condensed phase in which the cholesterol molecules are aligned normal to the water surface. We have transferred the monolayer from water surface ...
Algebraic approach in the study of time-dependent nonlinear integrable systems: Case of the singular oscillator

Bandyopadhyay, Jayendra N. (APS, 2001-03)

The classical and the quantal problem of a particle interacting in one dimension with an external time-dependent quadratic potential and a constant inverse square potential is studied from the Lie-algebraic point of view. ...
Alignment of Ge Nanoislands on Si(111) by Ga-Induced Substrate Self-Patterning

Gangopadhyay, Subhashis (APS, 2007-02)

A novel mechanism is described which enables the selective formation of three-dimensional Ge islands. Submonolayer adsorption of Ga on Si(111) at high temperature leads to a self-organized two-dimensional pattern formation ...
Alignment of liquid crystals using Langmuir‒Blodgett films of unsymmetrical bent-core liquid crystals

Manjuladevi, V.; Gupta, Raj Kumar (Taylor & Francis, 2019-02)

The properties of the thin films of liquid crystal (LC) molecules can be governed easily by external fields. The anisotropic structure of the LC molecules has a large impact on the electrical and optical properties of the ...
Alignment Of Liquid Crystalson Lb Films Of Stearic Acid

Gupta, Raj Kumar; Manjuladevi, V. (CIB Tech, 2012)

We formed the Langmuir monolayer of stearic acid at the air-water (A-W) interface. The Langmuir-Blodgett (LB) films were deposited on solid substrates at different surface pressures. The liquid crystal cells were prepared ...
All-solid-state electric double layer supercapacitors using Li1.3Al0.3Ti1.7(PO4)3 reinforced solid polymer electrolyte

Dalvi, Anshuman (Elsevier, 2022-05)

In this work, we report the fabrication and characterization of all-solid-state supercapacitors based on a conductive filler dispersed solid polymer electrolyte. Fast ionic Li1.3Al0.3Ti1.7(PO4)3 (LATP) reinforced PEO-PEG-LITFSI ...
All-solid-state Na+ ion supercapacitors using Na3Zr2Si2PO12-polymer hybrid films as electrolyte

Dalvi, Anshuman (Elsevier, 2021-09)

We report all-solid-state Na+ ion electrical double layer capacitors (EDLCs) for the first time in this study. These are fabricated using a novel Na+ ion solid polymer electrolyte (SPE) and high surface area (877 m2-g−1) ...
All-Solid-State Supercapacitors Based on Na+ Ion Composite Solid Polymer Electrolyte: Tailoring the Interface by Solvent Layer Approach

Dalvi, Anshuman (SSRN, 2023-12)

The present investigation proposes a novel approach to improve the performance of all solid-state supercapacitors (ASSCs). These ASSCs having a composite solid polymer electrolyte membrane (CSPE) and high surface area ...
The American Astronomical Society logo. The Institute of Physics logo. An X-Ray and Near-Infrared Study of Young Stars in the Carina Nebula

Vaidya, Kaushar (IOP, 2007)

We present a multiwavelength study of the central region of the Carina Nebula, including Trumpler 16 and part of Trumpler 14. Our analysis of the Chandra X-Ray Observatory archival data led to the identification of 454 ...
Analytical model of precessing binaries using post-Newtonian theory in the extreme mass-ratio limit I: General Formalism

Mukherjee, Sajal (ARXIV, 2024-02)

We develop a fully analytical waveform model for precessing binaries with arbitrary spin vectors using post-Newtonian theory in the extreme mass-ratio limit and a hierarchical multi-scale analysis. Although the post-Newtonian ...
Application of a self-consistent NEGF procedure to study the coherent transport with phase breaking scattering in low dimensional systems

Sarkar, Niladri (AIP, 2016-04)

We have studied Quantum Transport with dephasing in Low Dimensional systems. Here, we apply a self-consistent NEGF procedure to study the transport mechanism in low-dimensional systems with phase breaking scatterers. Under ...

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