A5087107254- Liquid Crystal Research Advancements
- Microwave-Assisted Synthesis and Applications
- Lanthanide and Transition Metal Complexes
- Crystal structures of chemical compounds
- Radioactive element chemistry and processing
- Surfactants and Colloidal Systems
- Nanomaterials for catalytic reactions
- Advanced ceramic materials synthesis
- Plant Reproductive Biology
- nanoparticles nucleation surface interactions
- Characterization and Applications of Magnetic Nanoparticles
- Magnetic properties of thin films
- Gyrotron and Vacuum Electronics Research
- Magnetism in coordination complexes
- Molecular Sensors and Ion Detection
- Plant and animal studies
- Copper Interconnects and Reliability
- Microwave Engineering and Waveguides
- Polyoxometalates: Synthesis and Applications
- Metallic Glasses and Amorphous Alloys
- Microwave Dielectric Ceramics Synthesis
- Metal and Thin Film Mechanics
- Magnetic Properties of Alloys
- Adsorption, diffusion, and thermodynamic properties of materials
- Iron oxide chemistry and applications
University of Maryland, College Park
2009-2019
United States Naval Research Laboratory
2004-2015
United States Navy
2003-2007
Naval Research Laboratory Materials Science and Technology Division
1998-2007
Research International (United States)
1998-2000
Hedgeye (United States)
1999-2000
Georgetown University
1996
Naval Research Laboratory Center for Bio/Molecular Science and Engineering
1995
University of Illinois Urbana-Champaign
1995
University of Connecticut
1991
Nanotechnology has spurred efforts to design and produce nanoscale components for incorporation into devices. Magnetic nanoparticles are an important class of functional materials, possessing unique magnetic properties due their reduced size (below 100 nm) with potential use in devices dimensions. Recent advances processing by chemical synthesis the characterisation focus this review. Emphasis been placed on various solution chemistry techniques used synthesise particles, including:...
Cobalt carbide nanoparticles were processed using polyol reduction chemistry that offers high product yields in a cost effective single-step process. Particles are shown to be acicular morphology and typically assembled as clusters with room temperature coercivities greater than 3.4 kOe maximum energy products 20 kJ m−3. Consisting of Co3C Co2C phases, the ratio phase volume, particle size all play important roles determining permanent magnet properties. Further, shape provides an...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSol-gel synthesis of ternary metal oxides. 1. Synthesis and characterization MAl2O4 (M = Mg, Ni, Co, Cu, Fe, Zn, Mn, Cd, Ca, Hg, Sr, Ba) lead aluminum oxide (Pb2Al2O5)Lynn K. Kurihara Steven L. SuibCite this: Chem. Mater. 1993, 5, 609–613Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 1993https://pubs.acs.org/doi/10.1021/cm00029a006https://doi.org/10.1021/cm00029a006research-articleACS...
Curve fitting of extended x-ray absorption fine structure (EXAFS) spectra, transmission electron microscopy (TEM) imaging, and Scherrer analysis diffraction (XRD) are compared as methods for determining the mean crystallite size in polydisperse samples platinum nanoparticles. By applying techniques to mixtures pure samples, it is found that EXAFS correctly determines relative sizes these while XRD tends be weighted more toward largest crystallites sample. Results TEM not clear cut, due...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTF-Element/crown ether complexes. 10. Oxidation of uranium tetrachloride to tetrachlorodioxouranate(2-) in the presence crown ethers: structural characterization complexed ammonium ionsRobin D. Rogers, Lynn K. Kurihara, and Matthew M. BenningCite this: Inorg. Chem. 1987, 26, 4346–4352Publication Date (Print):December 1, 1987Publication History Published online1 May 2002Published inissue 1 December 1987https://doi.org/10.1021/ic00273a014RIGHTS &...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTF-Element/crown ether complexes. 4. Synthesis and crystal molecular structures of [MCl(OH2)2(18-crown-6)]Cl2.2H2O (M = samarium, gadolinium, terbium)Robin D. Rogers Lynn K. KuriharaCite this: Inorg. Chem. 1987, 26, 10, 1498–1502Publication Date (Print):May 1, 1987Publication History Published online1 May 2002Published inissue 1 1987https://pubs.acs.org/doi/10.1021/ic00257a008https://doi.org/10.1021/ic00257a008research-articleACS PublicationsRequest...
The impact of magnetic nanoparticles with different surface coating upon the isotropic-to-nematic and nematic-to-smectic-$A$ phase transitions liquid crystal octylcyanobiphenyl is explored by means high-resolution adiabatic scanning calorimetry. A shrinkage nematic range observed, which strongly dependent on nanoparticles. transition remains weakly first order while continuous effective critical exponent $\ensuremath{\alpha}$ values (0.35 0.39, depending coating) between pure value...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe f-element/crown ether complexes. 5. Structural changes in complexes of lanthanide chloride hydrates with 18-crown-6 accompanying decreases Ln3+ ionic radii: synthesis and structures [M(OH2)7(OHMe)][MCl(OH2)2(18-crown-6)]2Cl7.cntdot.2H2O (M = yttrium, dysprosium)Robin D. Rogers, Lynn K. Kurihara, Eric J. VossCite this: Inorg. Chem. 1987, 26, 15, 2360–2365Publication Date (Print):July 1, 1987Publication History Published online1 May 2002Published...
Cu metallization of AlN substrates was performed using a nonaqueous, electroless, alcohol based approach known as the polyol method. The concentration Cu2O in film depended on orientation during deposition. This is very attractive for metallizing electronic which are susceptible to hydrolytic degradation.
The interaction of nanometer particles with organic materials is important because their increased use in many applications and potential biosystems. We found that liquid crystals respond to differently depending on the surface functionalization nanoparticles using x rays developed a phenomenological model explain differences we observed. from analysis peaks close 0.199 Å−1 inverse integrated intensity serves as measure how well crystal has reoriented compared graph obtained theory...
The behavior of smectic-A liquid crystals with magnetic particles has not been very well characterized. authors have studied the interaction a crystal nanoparticles. They concentrate on effect particles’ surface coating or functionalization compound. in nanoparticle is used to avoid phase separation and biological applications identify particular cell protein. Thus it important see how interacts conjunction found out that depending nanoparticles varies. This variation related aligns crystal,...
High-power microwave and millimeter-wave sources are currently being applied to ceramic processing studies at the Naval Research Laboratory (NRL). A single-mode cavity furnace, operating in TE/sub 103/ mode 2.45 GHz, is operational used investigate sintering of nanocrystalline ceramics. This paper reports design 2.45-GHz furnace its use initial experiments on alumina titania compacts. The high purity Al/sub 2/O/sub 3/ TiO/sub 2/ powders were prepared by sol-gel method. These first uniaxially...
We investigate the properties of a bi-molecular film liquid crystal close to magnetic nanoparticle terminated with variety functionalization compounds using atomic force microscopy. Studies in bulk crystals have shown that compound influences how reorients. The results this investigation are compared work done on phospholipids contact uncovered silica nanoparticles. Our studies nanoparticles show its behavior is dependent compound.
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A number of high-frequency microwave sintering studies alumina have reported that proceeds much faster in furnaces when compared to conventional furnaces, and densification can occur at lower temperatures. These differences motivated the search for a nonthermal enhancement effect such as time-averaged field-induced mass transport proposed by Rybakov Semenov (1994). To assess difference between sintering, presence study millimeter-wave (mm-wave) (35 GHz) has been conducted Naval Research...
A millimeter-wave beam based on a 15-kW, continuous-wave, 83-GHz gyrotron with superconducting magnets system is being investigated for use in material processing. The can be focused to few millimeters and manipulated quasi-optically has been used the following experiments: joining of ceramics (both similar dissimilar materials), brazing poled piezoelectric without significant heating depoling, coating metals polymers. Joining done directly reactive brazes. In coating, beam's short...