Article
Instruments & Instrumentation
Martin Borchert, Julia Braenzel, Richard Gnewkow, Leonid Lunin, Themistoklis Sidiropoulos, Johannes Tuemmler, Ingo Will, Tino Noll, Oliver Reichel, Dirk Rohloff, Alexei Erko, Thomas Krist, Clemens von Korff Schmising, Bastian Pfau, Stefan Eisebitt, Holger Stiel, Daniel Schick
Summary: We present a laser-driven soft-x-ray plasma source with short pulse duration and wide spectral range. This source is used in two laboratory-scale beamlines for time-resolved magnetic resonant scattering, spectroscopy, and NEXAFS spectroscopy. Dedicated reflection zone plates are utilized as optical elements to capture, disperse, and focus the soft x rays, achieving high resolving powers and efficient data acquisition. Our setup enables soft-x-ray experiments that were not previously possible on a laboratory scale, making it a viable alternative to large-scale facilities.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Biochemical Research Methods
Susmita Das, Ranju Prasad Mandal, Barun Mandal, Swati De
Summary: The study demonstrated that positively charged dye aggregates increase the size of the AOT/n-heptane/water reverse micellar pool, while negatively charged dye aggregates cause less expansion. Electrostatic interactions play a role in modulating the hydrodynamic radius, and the stacking of RhB molecules affects the degree of expansion. Differences in stacking, torsional mobility, and conductivity measurements indicate the role of the reverse micellar interface and microenvironment on dye aggregation.
JOURNAL OF FLUORESCENCE
(2021)
Article
Chemistry, Physical
Yufan He, Vishal Govind Rao, Jin Cao, H. Peter Lu
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2016)
Article
Chemistry, Physical
Bharat Dhital, Vishal Govind Rao, H. Peter Lu
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2017)
Article
Chemistry, Multidisciplinary
Vishal Govind Rao, Umar Aslam, Suljo Linic
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Article
Chemistry, Multidisciplinary
Swathi Swaminathan, Vishal Govind Rao, Jitendra K. Bera, Manabendra Chandra
Summary: The study demonstrates the simultaneous utilization of hot carriers in the photocatalytic transformation of benzylamine and the catalytic oxidation of 4-methoxybenzylamine using gold nanoparticles. Excitation of AuNP allows tuning of charge carrier potential energy relative to reactants' redox potential, leading to energetically favorable product formation. The reaction mechanism is proposed based on in situ Raman spectroscopy, NMR spectroscopy, and GC-MS analysis of reaction intermediates and products.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Chemistry, Multidisciplinary
Diksha Mittal, Monika Ahlawat, Vishal Govind Rao
Summary: The strong interaction of plasmonic nanostructures with electromagnetic radiation and subdiffraction-limit field localization enable immense opportunities in the field of photocatalysis. Plasmon-induced charge carriers allow metal nanostructures to catalyze surface reactions with selective pathways, addressing the problem of CO2 conversion and global warming. This review discusses the concepts and recent developments of plasmonic catalysis, as well as the challenges and future directions in this field.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Monika Ahlawat, Abhijit Roy, Vishal Govind Rao
Summary: Efficient plasmonic photocatalysis relies on strategic changes in the design principles of hybrid plasmonic nanocomposites to generate highly localized charge carriers. This study introduces a novel design of Au-Pt core-shell nanostructures, supported by simulations of optical properties, allowing selective funneling of plasmonic energy/charge carriers for plasmon-assisted cascade reduction reactions.
Article
Chemistry, Applied
Suvojit Roy, Subhankar Kundu, Subhajit Saha, Kotakonda Muddukrishnaiah, Rajib Pramanik, Bhaskar Biswas
Summary: In this study, a photo-switchable ionophore was designed and developed for the selective and efficient transport of Al (III) ions triggered by visible light. The probe exhibited green fluorescence at 518 nm upon irradiation at 405 nm in the presence of Al (III) ions, and the emission was turned off in the presence of EDTA in ethanol. Various experimental methods were used to assess the binding mode and structural characteristics of the ionophore. A testing strip was also developed for colorimetric and naked-eye detection of Al (III) ions. Bioimaging studies confirmed the ability of the ionophore to trace Al (III) ions in living cells. Cytotoxicity studies suggested that the probe could be an efficient and sensitive chemosensor for monitoring Al (III) ions in drug delivery and biological applications.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Siddharth Singh, Santosh Kumari, Monika Ahlawat, Vishal Govind Rao
Summary: This study demonstrates the synthesis of efficient Au-Pd core-shell nanoparticles that combine catalytic activity with plasmonic enhancement. The Au-Pd CS NPs showed high conversion rates for NADH regeneration under visible light irradiation. The mechanism of plasmonic enhancement was investigated through isothermal reactions and kinetic studies, revealing the energetic charge carrier generation as the driving force. This research expands the understanding of plasmon-driven catalysis and provides insights for improving catalytic efficiency.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Pooja Aggarwal, Monika Ahlawat, Vishal Govind Rao
Summary: This study explores the potential technological developments of perovskites by investigating the stability and transformation of cesium lead bromide nanocrystals upon exposure to ethanol and water. The increased stability of ethanol-treated nanocrystals is attributed to the adsorption of ethoxide ions on the interface, leading to enhanced charge-carrier separation. The findings also demonstrate the formation of water-stable nanocomposites with gold, suggesting the possibility of synergistic effects between plasmonic nanomaterials and perovskite materials in catalytic applications.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Physical
Pooja Aggarwal, Anubhab Halder, Neelakshi, Ramesh Ramapanicker, Vishal Govind Rao
Summary: By engineering a short-chain multidentate bolaamphi-philic ligand (NKE-3), the surface of all-inorganic lead halide perovskite nanocrystals (PNCs) can be efficiently passivated, resulting in a water-suspended colloidal solution. The tuned emission maxima of PNCs through halide exchange can optimize the fluorescence resonance energy transfer (FRET) efficiency.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Siddharth Singh, Diksha Mittal, Vinithra Gurunarayanan, Ankita Sahu, Ramesh Ramapanicker, Vishal Govind Rao
Summary: This study investigates the use of ferrocene-based molecules as molecular redox relays in photocatalysis using CsPbBr3 perovskite nanocrystals. The results show that the binding of the molecules to the nanocrystals' surface enhances the formation of a long-lived charge-separated state, indicating the potential of these molecules for efficient photocatalytic reactions.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Steven Chavez, Vishal Govind Rao, Suljo Linic
FARADAY DISCUSSIONS
(2019)
Review
Chemistry, Physical
Umar Aslam, Vishal Govind Rao, Steven Chavez, Suljo Linic
Article
Biochemical Research Methods
Alexander Kyrychenko, Mykola V. Rodnin, Chiranjib Ghatak, Alexey S. Ladokhin
ANALYTICAL BIOCHEMISTRY
(2017)
Article
Biophysics
Radhakrishnan Gnanasambandam, Chiranjib Ghatak, Anthony Yasmann, Kazuhisa Nishizawa, Frederick Sachs, Alexey S. Ladokhin, Sergei I. Sukharev, Thomas M. Suchyna
BIOPHYSICAL JOURNAL
(2017)