A5069392239- Muon and positron interactions and applications
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced Battery Materials and Technologies
- Membrane Separation and Gas Transport
- Advancements in Battery Materials
- MXene and MAX Phase Materials
- Covalent Organic Framework Applications
- Luminescence Properties of Advanced Materials
- Advanced Battery Technologies Research
- Conducting polymers and applications
- Chemical Synthesis and Characterization
- Nuclear materials and radiation effects
- Boron and Carbon Nanomaterials Research
- Membrane Separation Technologies
- Copper Interconnects and Reliability
- Advanced Photocatalysis Techniques
- Semiconductor Quantum Structures and Devices
- Semiconductor materials and devices
- Catalytic Processes in Materials Science
- Carbon Dioxide Capture Technologies
- GaN-based semiconductor devices and materials
- Microwave Dielectric Ceramics Synthesis
- Advanced ceramic materials synthesis
Bhabha Atomic Research Centre
2019-2023
Homi Bhabha National Institute
2019-2023
University of Mumbai
2019
National Institute of Solar Energy
2016
Zeolitic imidazolate framework-leaf (ZIF-L) is transformed to ZIF-8 through a topotactic phase transformation. This transformation driven by the removal of hydrogen-bonded linker molecules from 2D galleries ZIF-L, leading distortion in structure. Investigation crystallization kinetics ZIF-L shows that crystalline particles are formed within first minute, and growth leaf-type structures finished nearly 10 minutes. During transformation, leaf-like cleaved 3D nanocrystals. The chemical bonding...
Defects and their influence on light emitting properties were explored in CeO<sub>2</sub>:Eu,Nb using Rietveld refinement, positron annihilation luminescence spectroscopy.
Poly(ethylene oxide), PEO, based solid polymer electrolyte with different loadings of a lithium salt, bis(trifluoromethanesulfonyl)imide (LiTFSI), has been investigated to study the role PEO–Li cross-linking on segmental dynamics and free volume structure PEO which consequently determine thermal, mechanical, ion conduction properties electrolyte. In order investigate interrelation between dynamics, structure, mechanism, broadband dielectric spectroscopy positron annihilation have employed....
Hydrophobic flexible zeolitic imidazole frameworks (ZIFs) represent reference microporous materials in the area of mechanical energy storage, conversion, and dissipation via non-wetting liquid intrusion-extrusion cycle. However, some them exhibit drawbacks such as lack stability, high intrusion pressure, or low volume that make non-ideal to consider candidates for real applications. In this work, we face these limitations by exploiting hybrid ZIF concept. Concretely, a bimetallic SOD-like...
Although Zeolitic Imidazolate Frameworks (ZIFs) show a great promise in the field of molecular separation owing to their crystalline morphology pores, sieving performance ZIFs remains limited due flexible frameworks leading "gate opening" phenomenon under gas pressure. However, pore size expansion gate opening may ensure use as an efficient storage material at high In present study, we have investigated volume three (ZIF-8, ZIF-67, and ZIF-7) during CO2 adsorption up pressure ∼60 kg cm–2...
Free volume, semi-crystalline morphology and ionic conductivity of PEO–LiTFSI–SiO<sub>2</sub> nanoparticles electrolyte.
Crystal downsizing of zeolitic imidazolate framework-8 (ZIF-8) has been shown to affect the flexibility its framework, leading occurrence "gate-opening" phenomenon at higher applied gas pressures compared larger size crystals. In present study, we have investigated crystal size-dependent pore architecture crystalline desolvated ZIF-8 samples which is expected play most deterministic role in adsorption behavior. order avoid pressurization or molecule–ZIF interaction, positron annihilation...
Fine tuning of the pore architecture and flexibility zeolitic imidazolate frameworks (ZIFs) is highly crucial for realizing their applications in molecular gas separation. Mixed ligand (ZIF-7-8) synthesized by mixing 2-methylimidazole (2meIm) benzimidazole (bIm) ligands show enhanced separation performance, attributable to tuning. In present study, positron annihilation lifetime spectroscopy (PALS) measurements under CO2 pressure have been used experimentally investigate mixed ZIF-7-8 having...
The low ionic conductivity and electrode-electrolyte interface instability issues with solid polymer electrolytes jeopardize their electrochemical performances in lithium-ion batteries (LIBs). use of quasi-solid-state (QSSEs) concentrated Li salt embedded inside the pore networks metal organic frameworks (MOFs) can successfully address aforementioned issues. Owing to sieve effect zeolitic imidazolate framework-8 (ZIF-8) towards selective cation permeability over anions through interconnected...
This work highlights the size, structure, and composition manipulation for designing color-tunable phosphors based on doped scheelite micro- nanocrystals.
Zeolitic imidazole frameworks (ZIFs) have emerged as potential conductive materials for Li ion-transport in polymer solid state electrolytes. However, developing ZIFs with high ionic conductivity is rather limited due to their flexible allowing dual ion conduction. Herein, we used a mixed ligand strategy fine-tuning the aperture and enhancing rigidity of ZIF-8, which restricts passage large size anions. Poly(ethylene oxide)-based quasi-solid electrolytes utilizing ZIF-7-8 passive fillers...
The CO2 adsorption performance of porous materials loaded with an amine-bearing functionality is determined by the pore network adsorbents and dynamics adsorbed polymeric chains bearing amine functionality. Herein, we report modifications in evaporation-induced self-assembled microspheres silica nanoparticles varying loadings polyethyleneimine (PEI) using positron annihilation lifetime spectroscopy (PALS) small-angle X-ray scattering (SAXS). PEI have been investigated temperature-dependent...