J. K. Basu
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View article: FLARE: a label-free fluorescence-assisted method for RNA engineering of three-way junctions
FLARE: a label-free fluorescence-assisted method for RNA engineering of three-way junctions Open
FLARE is developed to engineer RNA three-way junctions (3WJs), which are abundantly found in many natural RNAs, into more stable engineered junctions for applications in gene editing and nanotechnology.
View article: Origin of the Fano interference and its tunability with near-field interactions in a guided mode-resonant metasurface
Origin of the Fano interference and its tunability with near-field interactions in a guided mode-resonant metasurface Open
Asymmetric resonances emerging from the Fano interference are a well-known phenomenon in fields like atomic physics and grating optics, and they have recently started to gain interest in artificially engineered dielectric, metallic, or com…
View article: Unraveling Direct Correlations between Membrane Nanodomain Reorganization and Antimicrobial Resistance Evolution in Bacterial Cells
Unraveling Direct Correlations between Membrane Nanodomain Reorganization and Antimicrobial Resistance Evolution in Bacterial Cells Open
Bacterial drug resistance is a major global health emergency that requires newer approaches for its detection, especially those that are rapid and sensitive at the single cell level. One of the major limitations of existing antimicrobial r…
View article: Non-monotonic temperature dependence of light-matter interaction in hyperbolic metamaterial due to interplay of electron-phonon scattering
Non-monotonic temperature dependence of light-matter interaction in hyperbolic metamaterial due to interplay of electron-phonon scattering Open
Hyperbolic metamaterials (HMM) are artificially engineered materials that are congenial for light-matter interaction studies and nanophotonic applications with the hyperbolic dispersion of light propagating through them, which offers a lar…
View article: Origin of the Fano interference and its tunability with near-field interactions in a guided mode-resonant metasurface
Origin of the Fano interference and its tunability with near-field interactions in a guided mode-resonant metasurface Open
Asymmetric resonances emerging from the Fano interference are a well-known phenomenon in fields like atomic physics and grating optics, and they have recently started to gain interest in artificially engineered dielectric, metallic, or com…
View article: Unraveling cavity-like modes of two-dimensional broad band hyperbolic metamaterial and their coupling to quantum emitters
Unraveling cavity-like modes of two-dimensional broad band hyperbolic metamaterial and their coupling to quantum emitters Open
Hyperbolic metamaterials (HMM) are artificially engineered materials that exhibit hyperbolic dispersion of light propagating through them. These have been extensively studied for tailoring light propagation. Most studies use an effective m…
View article: First result from tetrafluoroethane (C$_2$H$_2$F$_4$) superheated emulsion detector for dark matter search at JUSL
First result from tetrafluoroethane (C$_2$H$_2$F$_4$) superheated emulsion detector for dark matter search at JUSL Open
The superheated emulsion detector consisting of the droplets of tetra-fluoroethane (C2HC$_2$H$_2$F$_4$2F4) has been fabricated at the laboratory and installed at the 555m deep underground laboratory, JUSL during July to Dec 2022. The 500ml…
View article: Harnessing interfacial entropic effects in polymer grafted nanoparticle composites for tailoring their thermo-mechanical and separation properties
Harnessing interfacial entropic effects in polymer grafted nanoparticle composites for tailoring their thermo-mechanical and separation properties Open
Harnessing interfacial entropy in polymer-grafted nanoparticle composites enables precise control of thermo-mechanical properties, viscosity, and phase behavior, unlocking new functionalities in membranes for gas separation and water desal…
View article: Purcell Enhancement of Spontaneous Emission of a Quantum Emitter on a Waveguide
Purcell Enhancement of Spontaneous Emission of a Quantum Emitter on a Waveguide Open
We investigate the effect of a waveguide on an emitter spontaneous emission in its vicinity. The impact of various possible orientations of an emitter with respect to the waveguide surface is studied through simulations and compared with e…
View article: Inhibited spontaneous emission of quantum dots weakly coupled to off resonant silver nanoplatelets and silver nanowires
Inhibited spontaneous emission of quantum dots weakly coupled to off resonant silver nanoplatelets and silver nanowires Open
Spontaneous emission (SE) rate of any light emitters directly scales with the locally available modes for photons. The emission rate can be modified, by changing the dielectric environment of light emitters. Generally cavities with modes i…
View article: Microscopic temperature-dependent structural dynamics in polymer nanocomposites: role of the graft–matrix chain interfacial entropic effect
Microscopic temperature-dependent structural dynamics in polymer nanocomposites: role of the graft–matrix chain interfacial entropic effect Open
We demonstrate that, in entropic PNCs, deuterated-polymer grafted nanoparticles can alter the dynamics of the host polymer owing to the subtle balance of interactions occurring at different length scales in the matrix.
View article: Evaluating the transition dipole moment of quantum dots with absorption and angle resolved photo-luminescence spectroscopy
Evaluating the transition dipole moment of quantum dots with absorption and angle resolved photo-luminescence spectroscopy Open
In this manuscript, the evaluation procedure of transition dipole moment (TDM) is discussed. Semiconducting Cd_{x}Zn_{1-x}Se_{y}S_{1-y} alloyed quantum dots (AQDs) are used as the two level emitting system. The AQDs are then self-assembled…
View article: Selectively strong coupling MoS$_2$ excitons to a metamaterial at room temperature
Selectively strong coupling MoS$_2$ excitons to a metamaterial at room temperature Open
Light emitters in vicinity of a hyperbolic metamaterial (HMM) show a range of quantum optical phenomena from spontaneous decay rate enhancement to strong coupling. In this study, we integrate monolayer Molybdenum disulfide (MoS$_2$) emitte…
View article: <i>Escherichia coli</i> response to subinhibitory concentration of Colistin: Insights from study of membrane dynamics and morphology
<i>Escherichia coli</i> response to subinhibitory concentration of Colistin: Insights from study of membrane dynamics and morphology Open
Prevalence of wide spread bacterial infections bring forth a critical need in understanding the molecular mechanisms of the antibiotics as well as the bacterial response to those antibiotics. Improper usage of antibiotics, which can be in …
View article: <i>Escherichia coli</i> response to subinhibitory concentrations of colistin: insights from a study of membrane dynamics and morphology
<i>Escherichia coli</i> response to subinhibitory concentrations of colistin: insights from a study of membrane dynamics and morphology Open
Sublethal doses of colistin alters the membrane dynamics through surface interactions.
View article: Spontaneous formation and growth kinetics of lipid nanotubules induced by passive nanoparticles
Spontaneous formation and growth kinetics of lipid nanotubules induced by passive nanoparticles Open
Different stages of evolution of lipid nanotubules generated on supported lipid membranes upon binding of charged CdSe–ZnS quantum dots.
View article: Pore Forming Protein Induced Biomembrane Reorganization and Dynamics: A Focused Review
Pore Forming Protein Induced Biomembrane Reorganization and Dynamics: A Focused Review Open
Pore forming proteins are a broad class of pathogenic proteins secreted by organisms as virulence factors due to their ability to form pores on the target cell membrane. Bacterial pore forming toxins (PFTs) belong to a subclass of pore for…
View article: Interactions of surfactants with the bacterial cell wall and inner membrane: Revealing the link between aggregation and antimicrobial activity
Interactions of surfactants with the bacterial cell wall and inner membrane: Revealing the link between aggregation and antimicrobial activity Open
Surfactants with their intrinsic ability to solubilize lipids are widely used as antibacterial agents. Interaction of surfactants with the bacterial cell envelope is complicated due to their propensity to aggregate. It is important to disc…
View article: Spontaneous emission dynamics of $Eu^{ 3+}$ ions coupled to hyperbolic metamaterials
Spontaneous emission dynamics of $Eu^{ 3+}$ ions coupled to hyperbolic metamaterials Open
Sub-wavelength nanostructured systems with tunable electromagnetic properties, such as hyperbolic metamaterials (HMMs), provide a useful platform to tailor spontaneous emission processes. Here, we investigate a system comprising $Eu^{ 3+}(…
View article: Bacterial pore-forming proteins induce non-monotonic dynamics due to lipid ejection and crowding
Bacterial pore-forming proteins induce non-monotonic dynamics due to lipid ejection and crowding Open
Developing alternate strategies against pore forming toxin (PFT) mediated bacterial virulence factors require an understanding of the target cellular response to combat rising antimicrobial resistance. Membrane-bound protein complexes invo…
View article: Room temperature tunable coupling of single photon emitting quantum dots to localized and delocalized modes in plasmonic nanocavity array
Room temperature tunable coupling of single photon emitting quantum dots to localized and delocalized modes in plasmonic nanocavity array Open
Single photon sources (SPS), especially those based on solid state quantum emitters, are key elements in future quantum technologies. What is required is the development of broadband, high quantum efficiency, room temperature SPS which can…
View article: Strongly Coupled Exciton–Surface Lattice Resonances Engineer Long-Range Energy Propagation
Strongly Coupled Exciton–Surface Lattice Resonances Engineer Long-Range Energy Propagation Open
Achieving propagation lengths in hybrid plasmonic systems beyond typical values of tens of micrometers is important for quantum plasmonics applications. We report long-range optical energy propagation due to excitons in semiconductor quant…
View article: Strong suppression of emission quenching in core quantum dots coupled to monolayer MoS<sub>2</sub>
Strong suppression of emission quenching in core quantum dots coupled to monolayer MoS<sub>2</sub> Open
We report control of the emission efficiency of core QDs in MoS2–QD hetero-structure. At smaller separations we observe enhanced emission from QDs on MoS2as compared to the reference despite the presence of significant non-radiative proces…
View article: Size-dependent interaction of hydrophilic/hydrophobic ligand functionalized cationic and anionic nanoparticles with lipid bilayers
Size-dependent interaction of hydrophilic/hydrophobic ligand functionalized cationic and anionic nanoparticles with lipid bilayers Open
We study the nature of nanoparticle (NPs)-membrane interaction as a function of nanoparticle size for different functionalization using molecular dynamics simulation. Zinc sulphide quantum dots of size, 2 nm and 4 nm are used as model NPs,…
View article: Correlated protein conformational states and membrane dynamics during attack by pore-forming toxins
Correlated protein conformational states and membrane dynamics during attack by pore-forming toxins Open
Significance Listeriolysin O (LLO), a pore-forming toxin expressed by Listeria monocytogenes , plays a critical role in assisting bacteria escape the phagocytic vacuole. To evolve a suitable defense mechanism against LLO-mediated infection…
View article: Gold nanorod induced enhanced efficiency in luminescent solar concentrator device
Gold nanorod induced enhanced efficiency in luminescent solar concentrator device Open
We have observed significant changes in the edge emission of a luminescent solar concentrator device (LSC) consist of core shell Cd1-xZnxSe1-ySy quantum dots (QDs), and a monolayer of gold nanorods (GNRs) on the surface of LSC device. The …
View article: Evolution of inter-layer coupling in artificially stacked bilayer MoS<sub>2</sub>
Evolution of inter-layer coupling in artificially stacked bilayer MoS<sub>2</sub> Open
In this paper, we show experimentally that for van der Waals heterostructures of atomically-thin materials, the hybridization of bands of adjacent layers is possible only for ultra-clean interfaces.