Materials Literature
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Beta-cyclodextrin (beta-CD)-functionalized CdSe/ZnS quantum dots (QDs) are used for optical sensing and chiroselective sensing of different substrates using a fluorescence resonance energy transfer (FRET) or an electron transfer (ET) mechanisms. The FRET between the QDs and Rhodamine B incorporated in the beta-CD rece…
We report a plane-wave, supercell density functional theory (DFT) investigation of the adsorption and dissociation of water on (111) surfaces of Cu, Au, Pt, Pd, and Ni, five metals of potential interest in the context of water gas shift (WGS) catalysis. Binding energies, preferred adsorption sites, and configurations…
Biocompatible silk optical waveguides are fabricated by direct-write assembly and demonstrated to guide light in both straight and curved architectures. These waveguides can easily be doped or functionalized with bioactive molecules, and are promising materials for biophotonic devices.
Defined nanoparticle cluster arrays (NCAs) with total lateral dimensions of up to 25.4 microm x 25.4 microm have been fabricated on top of a 10 nm thin gold film using template-guided self-assembly. This approach provides precise control of the structural parameters in the arrays, allowing a systematic variation of th…
We report an industrially scalable, fast, and simple process for the large scale fabrication of optically transparent and electrically conducting thin films of single-walled carbon nanotubes (SWNT). Purified, pristine HiPco SWNTs were dispersed in water at high concentrations with the help of surfactants, rod-coated i…
Abstract Multiferroic heterostructures of Fe 3 O 4 /PZT (lead zirconium titanate), Fe 3 O 4 /PMN‐PT (lead magnesium niobate‐lead titanate) and Fe 3 O 4 /PZN‐PT (lead zinc niobate‐lead titanate) are prepared by spin‐spray depositing Fe 3 O 4 ferrite film on ferroelectric PZT, PMN‐PT and PZN‐PT substrates at a low tempe…
A well crystallized powder sample of sodium holmium orthosilicate oxyapatite, Na(2.27)Ho(7.73)(SiO(4))(6)O(0.72), was obtained after mechanical milling and thermal treatment at 1123 K. Crystal structure analysis was performed from the results of Rietveld refinement of the synchrotron diffraction data. As in other rare…
Abstract Surface Enhanced Raman Scattering (SERS) has been used to observe spectra of several amino acids and peptides. SERS signals from amino acids (tryptophan, phenylalanine and glycine) and peptides (Trp‐Trp and Gly‐Gly‐Gly) in silver colloids have been studied in three experimental configurations 1) free volume 2…
(K 0.5 Na 0.5 ) 1− x Li x Nb 0.95 Sb 0.05 O 3 (KNLNS‐ x, x =0–10 mol%) lead‐free piezoelectric ceramics were prepared by the conventional mixed‐oxide method. The temperature stability of the dielectric, piezoelectric, and ferroelectric properties of the two typical compositions (KNLNS‐2 with orthorhombic phase, and KN…
Sr(2)FeMoO(6) oxides exhibit a half-metallic ferromagnetic (HM-FM) ground state and peculiar magnetic and magnetotransport properties, which are interesting for applications in the emerging field of spintronics and attractive for fundamental research in the field of heavily correlated electron systems. Sr(2)FeWO(6) is…
Abstract Commercially available flat panel, direct conversion, digital X‐ray image detectors use a photoconductive layer of stabilized amorphous selenium (a‐Se) sandwiched between two electrodes to convert incident X‐ray radiation into stored electrical charge. These detectors use thin n ‐like and p ‐like blocking lay…
Laser-ablated gold atoms have been codeposited at 4 K with nitric oxide in excess argon and the low temperature reactions of Au with NO in solid argon have been studied using infrared spectroscopy. The reaction products Au(2)NO(-), Au(2)NO, Au(3)NO, Au(4)NO, and Au(5)NO are formed in the present experiments and charac…
A series of intense green/orange (Ca 1− x Sr x ) 3 SiO 4 Cl 2 :Eu 2+ and Ca 3 SiO 4 Cl 2−2 y F 2 y :Eu 2+ phosphors were synthesized by a high‐temperature (HT) solid‐state reaction and were characterized by means of X‐ray powder diffraction spectroscopy, photoluminescence excitation, and emission spectra. Both of the…
A multiscale modeling approach is developed to compute the phase diagram of the RbF-CsF binary system. The mixing enthalpies of the (Rb,Cs)F solid and liquid solutions are evaluated using density functional theory and classical molecular dynamics calculations, respectively. For the solid solution, 18 different configu…
The surface hydration of some crystalline polymeric (bio)materials is investigated at room temperature using molecular mechanics and molecular dynamics techniques through the statistical distribution of the water molecules as a function of their distance from the surface atoms. Considering different crystalline polyme…
A 1997 Nature paper (Nature 1997, 388, 353-355) and subsequent 1998 J. Am. Chem. Soc. paper (J. Am. Chem. Soc. 1998, 120, 11969-11976) reported that a putative Ru(2)-substituted polyoxoanion, "[WZnRu(2)(III)(H(2)O)(OH)(ZnW(9)O(34))(2)](11-)", (1), is an all inorganic dioxygenase able to incorporate one O(2) into two a…
We quantitated the skin elastic fibers of the papillary and reticular dermis using specific staining procedure followed by automated computerized image analysis. Fifty skin biopsies of patients consulting for cardiovascular risk factors were studied. The following parameters were estimated: surface area (% of total su…
The thermal degradation of rigid and plasticized poly(vinyl chloride) (PVC)/poly (methyl methacrylate) (PMMA) blends was investigated by means of isothermal and dynamic thermogravimetric analysis in a flowing atmosphere of air. For that purpose, blends of variable composition from 0 to 100 wt% were prepared in the pre…
In this paper we found the most stable structures of silicon-oxide clusters of Si(6)O(m) (m = 1-11) by using the genetic algorithm. In this work the genetic algorithm uses a semiempirical energy function, MSINDO, to find the best cluster structures of Si(6)O(m) (m = 1-11). The best structures found were further optimi…
The objective of the study was to describe a novel small-animal model of tissue-engineered aortic valve conduits and to investigate biological processes in an accelerated and inexpensive fashion. An isogenic Lewis-to-Lewis rat model was used to exclude immunological factors of graft deterioration. U-shaped aortic valv…