Ultrathin films of functionalised single-walled carbon nanotubes: a potential bio-sensing platform

M Poonia, V Manjuladevi, RK Gupta - Liquid Crystals, 2020 - Taylor & Francis
The Langmuir monolayer is a special class of lyotropic liquid crystalline system wherein
phase transition essentially depends on surface density, temperature and ion-content in the …

Photoinduced modulation of refractive index in Langmuir-Blodgett films of Azo-based H-shaped liquid crystal molecules

A Joshi, A Gayakwad, V Manjuladevi, MC Varia… - Journal of Molecular …, 2022 - Elsevier
The development of optically active area consisting of organic molecules are essential for
the devices like optical switches and waveguides, as it can be easily maneuvered by the …

Refractive index of graphene AA and AB stacked bilayers under the influence of relative planar twisting

A Kumar, V Manjuladevi, RK Gupta - Journal of Physics …, 2021 - iopscience.iop.org
The optical properties of graphene in monolayer and bilayer structure is essential for the
development of optical devices viz surface plasmon resonance (SPR) based bio-sensors …

Optical anisotropy and surface phases of cholesterol derivative monolayer at air–water interface

A Gayakwad, A Joshi, SV Bhat, RK Gupta… - Journal of Molecular …, 2024 - Elsevier
Cholesterol and its derivatives play crucial roles in regulating processes of biological
membranes. Langmuir monolayer can mimic a bio-membrane which can be used to …

Surface plasmon resonance for in-plane birefringence measurement of anisotropic thin organic film

A Kumar, RK Gupta, MV, A Joshi - Plasmonics, 2021 - Springer
The measurement of in-plane birefringence (Δ n Δ n) of ultrathin film is challenging due to a
significant deviation of physical properties of materials in ultrathin regime as compared to …

Ultrathin film of carboxylated graphene at air-water and air-solid interfaces

M Poonia, V Manjuladevi, RK Gupta - Surfaces and Interfaces, 2018 - Elsevier
Ultrathin films of graphene and functionalized graphene is drawing scientific attentions due
to its potential for industrial application. Due to the ease of processing and device …

Morphological transformation in the supramolecular assembly of discotic liquid crystal molecules using silver nanoparticles and its sensing application

A Joshi, V Manjuladevi, RK Gupta, S Kumar - Nanotechnology, 2020 - iopscience.iop.org
Triphenylene based discotic liquid crystal (TP) molecules are rich in π-electrons which
facilitate π-stacking interaction of the molcules leading to formation of one dimensional …

A versatile and compact surface plasmon resonance spectrometer based on single board computer

A Vestri, G Margheri, E Landini, E Meacci… - Review of Scientific …, 2020 - pubs.aip.org
The widespread diffusion of low-cost but high-performance hardware is enhancing the
realization of scientific equipment with features at the research laboratory level. In this paper …

Dependence of the optical constants and the performance in the SPREE gas measurement on the thickness of doped tin oxide over coatings

D Fischer, A Hertwig, U Beck, D Negendank… - Applied Surface …, 2017 - Elsevier
In this study, thickness related changes of the optical properties of doped tin oxide were
studied. Two different sets of samples were prepared. The first set was doped with iron or …

Sensing through surface plasmon resonance technique

RK Gupta - Reviews in Plasmonics 2016, 2017 - Springer
The optical phenomenon, surface plasmon resonance (SPR) has become extremely popular
owing to its high sensitivity, label-free and non-destructive measurement towards any …