A5022142663- Photochemistry and Electron Transfer Studies
- Laser-Matter Interactions and Applications
- Nonlinear Optical Materials Studies
- ZnO doping and properties
- Porphyrin and Phthalocyanine Chemistry
- Semiconductor materials and devices
- Luminescence and Fluorescent Materials
- Advanced Chemical Physics Studies
- Topological Materials and Phenomena
- Luminescence Properties of Advanced Materials
- Lanthanide and Transition Metal Complexes
- Atomic and Molecular Physics
- Chalcogenide Semiconductor Thin Films
- Photodynamic Therapy Research Studies
- Diamond and Carbon-based Materials Research
- Mass Spectrometry Techniques and Applications
- Crystallography and molecular interactions
- Free Radicals and Antioxidants
- Advanced Semiconductor Detectors and Materials
- Nanowire Synthesis and Applications
- Advanced Fiber Laser Technologies
- Supramolecular Chemistry and Complexes
- Spectroscopy and Laser Applications
- Conducting polymers and applications
- Rare-earth and actinide compounds
Savitribai Phule Pune University
2010-2024
Hebrew University of Jerusalem
2015-2017
Bhabha Atomic Research Centre
2010-2014
Abstract A water‐based narrow‐band high‐efficiency dye laser was designed by means of a supramolecular host–guest chemical approach. The lasing characteristics rhodamine B and sulforhodamine (Kiton Red S) dyes in aqueous solution with the macrocyclic host cucurbit[7]uril (CB7) as additive were investigated setup. Significant improvements both photostability thermo‐optical properties CB7‐complexed systems observed compared to uncomplexed ethanol solution. tuning curves for new dye–CB7–water...
Abstract Bodipy laser dyes are highly efficient but degrade rapidly in solution by reacting with situ generated singlet oxygen ( 1 O 2 ). To increase the lasing lifetimes of these dyes, we have designed and synthesised two different congeners widely studied Pyrromethene 567 (PM567) substitution at boron centre and/or both meso position. The new showed high efficiencies increased photostability. results theoretical pulse radiolysis studies revealed that reduced generation capacity as well...
The efficient intense field double detachment of molecular anions observed in SF6(–) is studied by 3D coincidence imaging the dissociation products. anisotropy and kinetic energy release distributions are determined for energetically lowest channel virtue disentangling SF5(+) + F fragmentation nearly isotropic with respect to linear laser polarization surprisingly high events suggest that occurs on a highly excited state. Rydberg (SF6(+))* states composed repulsive dication core electron...
We have devised new diketopyrrolopyrrole dyes soluble in polar solvents. The colors of the been changed by substituting 3,6-phenyl residues for thiophene groups. solubility solvents has improved alkylation a dimethylaminopropyne fragment with 1,3-sultone giving rise to sulfobetaine moieties. These exhibit strong and broad absorption visible range (488 nm phenyl-DPP 578 thiophene-DPP) intense fluorescence at, respectively, 554 (ΦF 0.36) 609 0.19). dye exhibits maximum band lasing efficiency...
Single-photon Coulomb explosion of methanol is instigated using the broad bandwidth pulse achieved through high-order harmonics generation. Using 3D coincidence fragment imaging one molecule at a time, kinetic energy release (KER) and angular distributions products are measured in different (CE) channels. Two-body CE channels breaking either C-O or C-H bonds described as well proton migration channel forming H2O+, which shown to exhibit higher KER. The results compared intense-field...
For the first time, we investigate strong-field photoelectron emission from LaB 6 needles, opening way towards new sources of ultra-short pulses electrons.
A simple approach dealing with thermal oxidation at atmospheric pressure was used to synthesize copper oxide nanowires (CuO-NWs) on substrate. The vertically oriented CuO-NWs were for further subjected deposition of ultrathin layer (∼20[Formula: see text]nm) lanthanum hexaboride (LaB[Formula: text] using the electron beam evaporation technique. observation characteristic vibrational mode LaB 6 in Raman spectrum LaB6-coated (LaB6@CuO-NWs) revealed existence deposited sample. Furthermore,...
A simple physical metal mask is efficiently employed to obtain an array of silicon (Si) nanowires (Si-NWs) on a Si substrate grown using the hot filament chemical vapor deposition route. Well adhered and uniform coating different thicknesses (20 50 nm) lanthanum hexaboride (LaB6) Si-NWs was obtained electron beam evaporation technique. The thickness LaB6 estimated from ellipsometry measurement. Structural, morphological, properties coated (LaB6@Si-NWs) arrays were revealed x-ray diffraction,...
A nanocomposite of Polypyrrole (PPy) and zinc oxide (ZnO), termed as PPy-ZnO, was synthesized by two step route. In the first step, synthesis PPy carried out chemical oxidative second PPy-ZnO under hydrothermal conditions. The as-synthesized nanocomposites were characterized using X-ray Diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform Infra-red (FTIR) Ultra violetvisible (UV-vis) spectroscopy to reveal phase, morphology, optical properties. physical characterizations...