A5101421059- Lipid Membrane Structure and Behavior
- Gold and Silver Nanoparticles Synthesis and Applications
- Nanomaterials for catalytic reactions
- Nanocluster Synthesis and Applications
- Protein Structure and Dynamics
- Force Microscopy Techniques and Applications
- Nanoparticle-Based Drug Delivery
- Spectroscopy and Quantum Chemical Studies
- Plant Gene Expression Analysis
- Lignin and Wood Chemistry
- Nanopore and Nanochannel Transport Studies
- Cancer and biochemical research
- Copper-based nanomaterials and applications
- Polymer crystallization and properties
- Advanced NMR Techniques and Applications
- Polymer Foaming and Composites
- ZnO doping and properties
- Enzyme-mediated dye degradation
- Gas Sensing Nanomaterials and Sensors
- Catalytic Processes in Materials Science
- Adsorption, diffusion, and thermodynamic properties of materials
- Molecular Sensors and Ion Detection
Virginia Tech
2019-2020
Clemson University
2018-2019
Indian Association for the Cultivation of Science
1993-2016
Bose Institute
1987
Significance Cholesterol regulates critical cell functions, including lysis, viral budding, and antibiotic resistance, by modifying the bending rigidity of membranes; i.e., ability membranes to bend or withstand mechanical stresses. A molecular-level understanding these functions requires knowledge how cholesterol modifies membrane mechanics over relevant length time scales. Currently, it is widely accepted that has no effect on properties unsaturated lipid membranes, implying viruses, for...
Mercaptoundecanoic acid (MUA) functionalized gold nanoparticles (AuNP-MUA) were synthesized and demonstrated to possess pH-triggered aggregation re-dispersion, as well the capability of phase transfer between aqueous organic phases in response changes pH. The pH for AuNP-MUA is consistent with pKa MUA (pH ~4) solution, while transition occurs at ~9. ion pair formation amine group octadecylamine (ODA), carboxylate MUA, hydrophobic alkyl chain ODA facilitates into an medium. investigated a...
Immobilization of colloidal gold nanoparticles (AuNPs) on metal oxide supports is often done to enhance stability and recoverability over multiple reaction cycles but with a reduction in available surface area. It has been theorized that AuNPs are catalytically more active selective than the supported counterparts mass basis. Direct comparison catalytic activity area 5 nm diameter (AuNP) dispersed solution titania conducted this work. A versatile spectroscopic organothiol ligand adsorption...
Liposome-nanoparticle assemblies (LNAs) are vital in the context of novel targeted drug-delivery systems, addition to investigating nanoparticle-lipid bilayer interactions. Quantifying membrane structural properties and dynamics presence nanoparticle inclusions provides a simple model elucidate effects on biophysical properties. We present experimental evidences softening due small hydrophobic gold inclusions. LNA structure has been investigated by combination cryo-transmission electron...
Thiolated pH-responsive poly(acrylic acid) functionalized gold nanoparticles (AuNP-SPAA) were investigated as recoverable and reusable catalysts in catalyzing the 4-nitrophenol reduction reaction. The thiolated PAA (PAA-SH) functionality enabled successful catalyst recovery via two different methods: (1) pH-triggered aggregation/redispersion (2) phase transfer to organic solvent from aqueous media a agent. Confirmed by small angle neutron scattering, both large molecular weight polymers with...
Kraft lignin was isolated into fractions encompassing a range of molecular weights (MW) using fractionation/purification process. Small angle neutron scattering (SANS) used to determine the absolute MW, structure, and association behavior these in deuterated alkaline solutions. Lignin subunits are elongated, rigid, rod-like structures exist as large aggregates. Significant elongation macromolecular dimension observed with increasing this translating directly higher-performance carbon fibers....
Abstract This article reports the optical and magnetic properties of Cu (1− x ) Dy O ( = 0.02 0.05) nanoparticles (NPs) synthesized via coprecipitation. An increase in doping causes a red shift bandgap, X‐ray photoelectron spectroscopy reveals 2+ 3+ valence states for both ions, along with oxygen vacancies. The isothermal magnetizations fit well combination linear antiferromagnetic Langevin components. In particular, Dy‐doped CuO exhibits low‐temperature ferromagnetism driven by interactions...