Mrigank Singh Verma

Synthesis of Highly Dipolar, Zwitterionic Naphthalene Diimides: Access to Stable, Six-State Amphoteric-Redox Property, and Large NLO Response

Sudhir Kumar Keshri, Bidhan Hazra, Yogendra Kumar, Mrigank Singh Verma et autres

Highly dipolar molecules are crucial in areas of optics, energy, etc. However, their effective design, synthesis, and purification remain a challenge. Herein, we report the synthesis of highly dipolar zwitterions by successive ArS N reactions via C–C and C–N bond formation to …

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Super‐Resolved Protein Imaging Using Bifunctional Light‐Up Aptamers

Franziska Grün, Niklas van den Bergh, Maja Klevanski, Mrigank Singh Verma et autres

Abstract Efficient labeling methods for protein visualization with minimal tag size and appropriate photophysical properties are required for single‐molecule localization microscopy (SMLM), providing insights into the organization and interactions of biomolecules in cells at the molecular level. Among the fluorescent light‐up aptamers …

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Super‐Resolved Protein Imaging Using Bifunctional Light‐Up Aptamers

Franziska Grün, Niklas van den Bergh, Maja Klevanski, Mrigank Singh Verma et autres

Efficient labeling methods for protein visualization with minimal tag size and appropriate photophysical properties are required for single-molecule localization microscopy (SMLM), providing insights into the organization and interactions of biomolecules in cells at the molecular level. Among the fluorescent light-up aptamers (FLAPs) …

de, nl, us (code pays fourni par la source)

Super-resolved protein imaging using bifunctional light-up aptamers

Franziska Grün, Niklas van den Bergh, Maja Klevanski, Mrigank Singh Verma et autres

ABSTRACT Efficient labeling methods for protein visualization with minimal tag size and appropriate photophysical properties are required for single-molecule localization microscopy (SMLM), providing insights into the organization and interactions of biomolecules in cells at the molecular level. Among the fluorescent light-up aptamers …

de, us (code pays fourni par la source)

Fast-exchanging spirocyclic rhodamine probes for aptamer-based super-resolution RNA imaging

Daniel Englert, Eva‐Maria Burger, Franziska Grün, Mrigank Singh Verma et autres

Live-cell RNA imaging with high spatial and temporal resolution remains a major challenge. Here we report the development of RhoBAST:SpyRho, a fluorescent light-up aptamer (FLAP) system ideally suited for visualizing RNAs in live or fixed cells with various advanced fluorescence microscopy modalities. …

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Second harmonic generation-based nonlinear plasmonic RI-sensing in solution: the pivotal role of the particle size

Mrigank Singh Verma, Manabendra Chandra

RIU is achieved. The RI sensitivity of our SHLS-based approach is two orders of magnitude higher than that obtained using linear Rayleigh scattering. Most importantly, we show that the particle size plays a crucial role in controlling the nonlinear plasmonic sensing performance …

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Nonlinear Plasmonic Sensing for Label-Free and Selective Detection of Mercury at Picomolar Level

Mrigank Singh Verma, Manabendra Chandra

We present the concept of a nonlinear plasmonic sensing approach for rapid, sensitive, and label-free detection of mercury. Nonlinear plasmonic sensing of mercury relies on a systematic combination of nonlinear optics (NLO) with well-known concepts of amalgamation chemistry and plasmonic properties of …

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Controlling second harmonic generation of gold nanorods: Surface area matters more than aspect ratio

Mrigank Singh Verma, Manish Kumar, Manabendra Chandra

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Nanoscale plasmon–exciton interaction: the role of radiation damping and mode-volume in determining coupling strength

Manish Kumar, Jyotirban Dey, Mrigank Singh Verma, Manabendra Chandra

Unravelling the exact role of each individual plasmon decay channel in plasmon-exciton coupling is pivotal for successful realization of the exciting potential applications of plexcitonic nanostructures. Here, we successfully demonstrate how exactly one specific plasmon dephasing channel, radiation damping, influences plasmon-exciton coupling …

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Probing the role of oscillator strength and charge of exciton forming molecular J-aggregates in controlling nanoscale plasmon–exciton interactions

Kamalika Das, Jyotirban Dey, Mrigank Singh Verma, Manish Kumar et autres

In this study, we probe into the roles of exciton oscillator strength and charge of J-aggregates as well as nanoparticle's surface capping ligands in dictating the plasmon-exciton interaction. We systematically compare the plasmon-exciton coupling strengths of two hybrid plexcitonic systems involving CTAB-capped …

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Donor‐Acceptor Styrylisoxazoles: Solvatochromism and Large First Hyperpolarizability

Jagadish Katla, Bidhan Hazra, Mrigank Singh Verma, Veerabhadraiah Palakollu et autres

Abstract The present work describes the synthesis and linear as well as nonlinear optical studies of donor‐acceptor based styrylisoxazoles. Six styrylisoxazoles were synthesized, and examination of their photophysical properties reveals strong solvent polarity sensitivity due to intramolecular charge transfer characteristics. Most interestingly, …

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Hollow Gold Nanoprism as Highly Efficient “Single” Nanotransducer for Surface-Enhanced Raman Scattering Applications

Bidhan Hazra, Kamalika Das, Sudeshna Das Chakraborty, Mrigank Singh Verma et autres

In this Article, we report the optical properties of anisotropic hollow nanostructure, hollow gold nanoprism (HGN, an equilateral triangular gold nanoprism with a circular cavity) and its application as a highly active “nonaggregated” surface-enhanced Raman scattering (SERS) substrate. Small colloidal HGNs are …

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