A5053652082- Glass properties and applications
- Phase-change materials and chalcogenides
- Nuclear materials and radiation effects
- Laser Material Processing Techniques
- Terahertz technology and applications
- Recycling and utilization of industrial and municipal waste in materials production
- Chalcogenide Semiconductor Thin Films
- Luminescence Properties of Advanced Materials
- Nuclear Materials and Properties
- Advanced Condensed Matter Physics
- Lichen and fungal ecology
- Advanced Semiconductor Detectors and Materials
- Quantum Dots Synthesis And Properties
- Semiconductor Lasers and Optical Devices
- Radiation Detection and Scintillator Technologies
- Photonic Crystals and Applications
- Laser-induced spectroscopy and plasma
- Advanced Surface Polishing Techniques
- Mineralogy and Gemology Studies
- Neutrino Physics Research
- Solid State Laser Technologies
- Advanced ceramic materials synthesis
- Material Dynamics and Properties
- Acoustic Wave Resonator Technologies
- Recycling and Waste Management Techniques
Amrita Vishwa Vidyapeetham
2024
Alfred University
2014-2023
New York State College of Ceramics
2014-2023
Pacific Northwest National Laboratory
1999-2011
Richland College
2007-2011
United States Department of Commerce
2004-2008
Oak Ridge National Laboratory
2007-2008
National Technical Information Service
2004
Office of Scientific and Technical Information
2004
Harvard University
2002
The possible combination of specific physicochemical properties operating at unique sites action within cells and tissues has led to considerable uncertainty surrounding nanomaterial toxic potential. We have investigated the importance proteins adsorbed onto surface two distinct classes nanomaterials (single-walled carbon nanotubes [SWCNTs]; 10-nm amorphous silica) in guiding uptake or toxicity RAW 264.7 macrophage–like model. Albumin was identified as major fetal bovine human serum/plasma...
Aerogels employing chalcogen-based (i.e., S, Se, and/or Te) structural units and interlinking metals are termed chalcogels have many emerging applications. Here, discussed in the context of nuclear fuel reprocessing radioactive waste remediation. Motivated by previous work on removal heavy aqueous solution, we explored application germanium sulfide as a sorbent for gas-phase I2 based Pearson's Hard/Soft Acid–Base (HSAB) principle. This was driven significant need high-efficiency sorbents...
The photovoltaics market has been growing rapidly in the past decade or so, driven by policy support, economies of scale, and technological improvements. Continued advances manufacturing technologies may drive further cost reductions facilitate growth going forward. Here, we review one such potential advance: use ultrafast laser processing silicon photovoltaic production. We provide an overview current major capabilities silicon, including texturing, hyperdoping, combined texturing...
The structure of homogeneous bulk As x S100− (25 ≤ 42) glasses, prepared by the conventional rocking–melting–quenching method, was investigated using high-resolution X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. It is shown that main building blocks their glass networks are regular AsS3/2 pyramids sulfur chains. In S-rich domain, existence quasi-tetrahedral (QT) S = As(S1/2)3 units deduced from XPS data, but with a concentration not exceeding ∼3–5% total atomic sites....
Abstract Terahertz (THz) time-domain spectroscopy (TDS, THz-TDS) was used to measure THz optical properties, i.e., refractive indices and absorption coefficients, of borosilicate, tellurite, chalcogenide glass families. We observe that the properties depend on compositions. recorded an increasing trend from borosilicate tellurite Our results demonstrate ability select a family, system, composition target for potential use in photonic applications. report K β fitting parameters power-law...
Compounds with the formulae CaZr1-xCexTi2O7 x = 0.1-0.5 were synthesized by solid state reaction. Cerium was used as a surrogate for actinide elements. A transition from 2M polymorph to 4M (expanded unit cell due cation ordering) in zirconolite observed increasing cerium content. The presence of both tri- and tetravalent Ce, contrary formulation, confirmed using X-ray absorption near edge spectroscopy, suggesting substitution on Ca Zr sites. Sintering carried out via spark plasma sintering,...
Abstract We report, for the first time, an early evidence of structure‐terahertz (THz) property relationship two tie‐lines within sodium borosilicate glass system. The NaBSi series was chosen to study effect substitution silicon dioxide boron oxide, whereas BNaSi studies oxide. Nuclear magnetic resonance, infrared absorption, and Raman spectroscopies were used determine structural changes across both series. THz time‐domain spectroscopy record refractive index over measured bandwidth....
Ultrafast light-induced molecular reactions on aerosolized nanoparticles may elucidate early steps in the photoactivity of with potential impact fields ranging from chemistry and medicine to climate science. In situ morphology discrimination for nanoparticle streams when measuring reaction yields is crucial, but lacking. Here, we experimentally demonstrate, using nanoscopy technique, that proton momenta deprotonation induced by intense femtosecond pulses exhibit clear, distinguishable...
Transmittance measurements on various single crystal ferroelectric and dielectric materials, BaTiO(3), SrTiO(3), LiNbO(3), LiTaO(3), (PbMg(1/3)Nb(2/3)O(3))0.73-(PbTiO(3))0.27, LaAlO(3), Bi(4)Ge(3)O(12), over a broad millimeter-wave (MMW) frequency range have been performed. Frequency dependence of the complex permittivity has measured in MMW region using high-power sources for first time, free-space, quasi-optical spectrometer equipped with backward wave oscillators (BWOs) as coherent...
Gamma radiation is known to induce changes in physical, optical, and structural properties chalcogenide glasses, but previous research has focused on As 2 S 3 families of glasses containing Ge . For the first time, we present composition dose dependent data As–S binary glass series. Binary x 100−x ( = 30, 33, 36, 40, 42) were irradiated with gamma using a 60 Co source at 2.8 Gy/s accumulated doses 1, 2, 3, 4 MGy. The samples characterized each level for density, refractive index, X‐ray...
Novel ceramic materials and advanced techniques for processing them controlling their microstructure are breaking new ground in the areas of energy, environment, transportation. For example, terahertz ( TH z) properties structures reveal potential sensing energy environmental applications as well local communication networks Emerging opportunities development improved porous ceramics engine emissions control discussed particular, consideration key role that this technology has with respect...