Search Results - "Dantham, Venkata Ramanaiah"

Observation of reversible and irreversible charge transfer processes in dye-monolayer graphene systems using Raman spectroscopy as a tool by Sharma, Anamika, Ramanaiah Dantham, Venkata

“…[Display omitted] •Graphene monolayers are transferred successfully onto glass substrates from Cu substrate using the polymer-assisted exfoliation…”
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Study of surface enhanced fluorescence of CdSeS/ZnS alloyed quantum dots using cytop layer as a dielectric spacer by Mahata, Tania, Mohan Das, Gour, Ramanaiah Dantham, Venkata

“…[Display omitted] •For the first time, we report the surface enhanced fluorescence (SEF) spectra of CdSeS/ZnS alloyed quantum dots.•The cytop coated…”
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Effect of Size-Dependent Damping on Plasmon-Hybridized Modes of Asymmetric Nanosphere Dimers: the Role of Nanogap, Size Ratio, Surrounding Medium, and Substrate by Priya, Sugandh, Dantham, Venkata Ramanaiah

“…Herein, we report quasi-static theory-based simulations on size-asymmetric Au and Ag nanosphere dimers in which size-dependent damping induced by the…”
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Optical Properties of Au-Ag Bimetallic Nanoparticles of Different Shapes for Making Efficient Bimetallic-Photonic Whispering Gallery Mode Hybrid Microresonators by Tiwari, Pragya, Das, Gour Mohan, Dantham, Venkata Ramanaiah

“…For the first time, we propose a bimetallic-photonic whispering gallery mode (WGM) hybrid microresonator for the detection and sizing of single protein…”
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Experimental and Numerical Investigation on Plasmonic Properties of Single-Sprouted Potato-Shaped Au-Ag Bimetallic Nanoparticles by Sahoo, Sibanisankar, Das, Gour Mohan, Dantham, Venkata Ramanaiah

“…Herein, we report the experimental and theoretical study on scattering spectra of single-sprouted potato-shaped Au-Ag bimetallic nanoparticles. In detail,…”
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Photonic nanojet-mediated SERS technique for enhancing the Raman scattering of a few molecules by Das, Gour Mohan, Laha, Ranjit, Dantham, Venkata Ramanaiah

“…We report a two‐step enhancement of Raman scattering signal (η) of a few dye molecules. In the first step, high‐quality surface‐enhanced Raman scattering…”
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Enhancement of Raman scattering signal using photonic nanojet of portable and reusable single microstructures by Arya, Akash, Laha, Ranjit, Das, Gour Mohan, Dantham, Venkata Ramanaiah

“…We report the enhancement of Raman scattering signal for the first time using photonic nanojet of a lollipop‐shaped microstructure (LMS) fabricated with the…”
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Plasmonic Properties of Nano- and Microscale Dielectric Substrates-Supported Nanoshell Dimers: Effects of Type and Propagation Direction of Excitation Light by Das, Gour Mohan, Dantham, Venkata Ramanaiah, Arya, Akash

“…Herein, we report a finite element method simulated near-field spectra of single nanoshell dimers placed over nano- and microscale dielectric substrates. The…”
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Near- and Far-Field Plasmonic Properties of Different Types of Eccentric Core-Shell Nanodimers by Das, Gour Mohan, Dantham, Venkata Ramanaiah

“…Finite element method (FEM) simulations have been carried out on free-standing and finite dielectric substrate-supported eccentric (i) silica core-gold…”
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Enhancement of Raman signal of monolayer graphene films using a single optical microsphere-assisted Raman microscopic technique by Sharma, Anamika, Dantham, Venkata Ramanaiah

“…[Display omitted] •We report the enhancement of the Raman signal of monolayer graphene films (MGFs) using the SOMRM technique.•For comparison, the Raman…”
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Short and elongated photonic nanojets emerged from single solid/hollow core-shell microparticles illuminated by focused Gaussian beams and plane wave by Mandal, Amartya, Dantham, Venkata Ramanaiah

“…•Using developed analytical equations, for the first time, the theoretical investigation has been done on short and elongated photonic nanojets (PNJs)…”
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Silicon nanoparticle-based near-infrared surface enhanced fluorescence without any “dielectric spacer” by Patar, Pranabjyoti, Joshi, Prerna, Dantham, Venkata Ramanaiah

“…For the first time, herein, we report the theoretical investigation on silicon (Si) nanoparticle-based near-infrared (NIR) surface-enhanced fluorescence (SEF)…”
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Wavelength-dependent angular shift and figure of merit of silver-based surface plasmon resonance biosensor by Priya, Sugandh, Laha, Ranjit, Dantham, Venkata Ramanaiah

“…[Display omitted] •A multiwavelength two prism optical configuration is developed for exciting surface plasmons.•The sensing experiments are performed with…”
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Indium nanoparticle-based surface enhanced fluorescence from deep ultraviolet to near-infrared: A theoretical study by Priya, Sugandh, Mandal, Amartya, Dantham, Venkata Ramanaiah

“…[Display omitted] •Near and far-field plasmonic properties of the Indium nanospheres are investigated.•Indium nanoparticle-based surface enhanced fluorescence…”
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Generation of conventional and reflective photonic nanojets and improving intensity enhancement with their superposition by Sharma, Anamika, Siddharth, Arya Kumar, Dantham, Venkata Ramanaiah

“…Herein, we report the theoretical investigation on photonic nanojets (PNJs) of substrate-supported single-spherical dielectric microparticles. Conventional and…”
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Study of surface enhanced Raman scattering of IR-780 Iodide molecules using Au-Ag bimetallic nanostructures with blunt and sharp sprouts by Mahata, Tania, Das, Gour Mohan, Dantham, Venkata Ramanaiah

“…[Display omitted] •The effect of growth time on the shape of the bimetallic nanoparticles is studied.•The SERS spectra are recorded using a sample with…”
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Enhancement of R aman scattering signal using photonic nanojet of portable and reusable single microstructures by Arya, Akash, Laha, Ranjit, Das, Gour Mohan, Dantham, Venkata Ramanaiah

“…We report the enhancement of Raman scattering signal for the first time using photonic nanojet of a lollipop‐shaped microstructure (LMS) fabricated with the…”
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Periodic plasmonic enhancing epitopes on a whispering gallery mode biosensor by Arnold, Stephen, Dantham, Venkata Ramanaiah, Barbre, Curtis, Garetz, Bruce A, Fan, Xudong

“…We propose the attachment of a periodic array of gold nanoparticles (epitopes) to the equator of a Whispering Gallery Mode Biosensor for the purpose of…”
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Influence of whispering gallery modes (WGMs) on energy transfer by Dantham, Venkata Ramanaiah, Bisht, Prem Ballabh

“…Even though the decay rate of the pure donor remains unchanged, the efficiency of excitation energy transfer due to the dipole–dipole interaction is enhanced…”
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Whispering gallery modes and effect of coating on Raman spectra of single microspheres by Dantham, Venkata Ramanaiah, Bisht, Prem Ballabh, Dobal, Pramod Singh

“…Raman spectra and fluorescence of BaTiO3 and silica microspheres of different sizes have been studied. The observed whispering gallery modes (WGMs) have been…”
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