184 research outputs found
Temperature-dependent photoconductivity as a tool to unveil defect-mediated carrier dynamics in ZnO1-δ thin films
No full texthttp://dx.doi.org/10.13039/501100001412 Council of Scientific and Industrial Research, Indiahttp://dx.doi.org/10.13039/501100001843 Science and Engineering Research Boar
Durga Puja in Glasgow
No full textThis is an exploration of Durga Puja in Glasgow. By comparing and contrasting Durga Puja in Glasgow with that of contemporary Kolkata, as well as Rachel Fell McDermott’s picture of the puja in the north-eastern USA, the chapter explores the aesthetic tradition, the nature of the pratimas, the religious and community context, and the stated aims of the puja committee. The Muslim dimension of the Bengali diaspora is also brought into consideration, finding overlaps between what is significant to all Bengalis, and identifying how Bengali culture manifests itself in the context of the religious practices of Islam. Language and cultural traditions are important across the diaspora communities, but the fostering of religious and national identity nevertheless results in separate expressions and resources for the promotion of the Bengali Language. The diverse Hindu religious traditions of the Indian diaspora have their different manifestations too. The promotion of the Bengali
Language can be viewed as crucial to the identity of the Muslim Bangladeshi diaspora; but for the West Bengali community, it is Durga Puja above all that emerges as the unique focus of identity, creating a ‘home from home’, as well as acting as a means of inclusion for the Bengali-speaking Hindus of Glasgow
Effects of surface capping with Poly-vinyl butyral (PVB) on the ultraviolet photosensing properties of ZnO nanorods
No full text
Studies on the photoluminescence, photoconductivity and photocatalytic properties of undoped and doped ZnO nanostructures
No full textThe thesis deals with an indepth understanding of the photoluminescence and photoconductivity properties of both undoped and doped hydrothermal and aqueous chemically grown ZnO nanostructures followed by the photocatalytic properties of Zn)-rGO binary and ZnO -Ag-rGo ternary hybridsResearch was conducted under the supervision of Prof. Durga Basak of the Solid State Physics division under SPS [School of Physical Sciences]Research was carried out under CSIR fellowship and gran
A multiphase phase-field study of three-dimensional martensitic twinned microstructures at large strains
No full textA thermodynamically consistent multiphase phase-field approach for stress and temperature-induced martensitic phase transformation at the nanoscale and under large strains is developed. A total of N independent order parameters are considered for materials with N variants, where one of the order parameters describes A M transformations and the remaining N-1 independent order parameters describe the transformations between the variants. A non-contradictory gradient energy is used within the free energy of the system to account for the energies of the interfaces. In addition, a non-contradictory kinetic relationships for the rate of the order parameters versus thermodynamic driving forces is suggested. As a result, a system of consistent coupled Ginzburg-Landau equations for the order parameters are derived. The crystallographic solution for twins within twins is presented for the cubic to tetragonal transformations. A 3D complex twins within twins microstructure is simulated using the developed phase-field approach and a large-strain-based nonlinear finite element method. A comparative study between the crystallographic solution and the simulation result is presented.This is a pre-print of the article Basak, Anup, and Valery I. Levitas. "A multiphase phase-field study of three-dimensional martensitic twinned microstructures at large strains." arXiv preprint arXiv:2206.12576 (2022).
DOI: 10.48550/arXiv.2206.12576.
Copyright 2022 The Author(s).
Attribution 4.0 International (CC BY 4.0).
Posted with permission
Interaction of an Ultrathin Zinc Surface Passivation Layer with a Room Temperature-Deposited Al-Doped ZnO Film Leading to Highly Improved Electrical Transport Properties
No full textIn this study, we have demonstrated the interaction of
an ultrathin
Zn surface passivation layer with a room temperature (RT)-deposited
Al-doped ZnO (AZO) film, leading to highly improved electrical transport
properties. The resistivity of the AZO film increases monotonically
with time in ambient conditions (from 0.02 to 0.33 Ω·cm),
while overlaying a 4 nm Zn layer on AZO film stabilizes the resistivity
to a value of 4.56 × 10–3 Ω·cm,
which decreases to a value of 2.40 × 10–3 Ω·cm
for a 5.3 nm Zn overlayer. The remarkable enhancement in the electrical
stability and the conductivity value is attributed to a probable diffusion
of Zn species into the AZO films, passivating Zn vacancy (VZn) and forming Zn interstitial (Zni), Zni-VO donor complexes supported by RT Raman and X-ray photoelectron
spectroscopy studies. Temperature-dependent resistivity measurement
reveals the semiconducting behavior of the AZO films with 4 and 6
nm Zn overlayer, where the transport process is governed by thermally
activated band conduction at and below RT (up to ∼247 K), followed
by nearest-neighbor hopping and Mott variable range hopping mechanisms
as the temperature goes down. The 5.3 nm Zn-coated AZO film shows
metallic behavior at RT and a metal to semiconductor transition ∼220
K deviating from the Boltzmann conduction process due to electron–electron
interaction phenomena
Uncharacteristic effect on the ultraviolet and visible photoluminescence properties of ZnO:Cl films: A physical insight
No full text- …
