Materials Literature
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The emissive properties of proton implanted fused silica surfaces have been studied by laser beam annealing. When submitted to a high thermal step from a focused CO2 laser, an intense near infra-red thermoluminescence peak rises at a heating rate threshold. The in plane tensile stress relaxes and silica melts. We show…
A method based on an image analysis procedure was developed to calculate the shape and surface tension of pendant droplets hanging down in air from the tip of a syringe. In contrast to most existing methods, a numerical solution of the Young-Laplace equation of capillarity for the calculation of th e drop contour is n…
New multinary selenides Ae3SnPn2Se8 (Ae = Sr, Ba; Pn = Sb, Bi), Sr8.01Ge2.04Bi7.95Se24, and Sr8YGe2Bi7Se24 were synthesized by solid-state reaction, and their structures were determined by single-crystal X-ray diffraction. These compounds crystallize in orthorhombic space group Pnma (no. 62) for Ae3SnPn2Se8 (Ae = Sr,…
An OFF-ON-OFF-type three-stage binary switching was realized with an azoaniline-based polybase 1. The optical properties of 1 and [1·2H](2+) are essentially indistinguishable to the naked eye but distinctively different from those of [1·H](+) to produce an unusual bell-shaped response as a function of protonation stat…
Based on the first-principles total-energy calculations, we demonstrate the possibility of controlling the band-gap and carrier type of bilayer graphene using ionic molecules. Our calculations suggest that bilayer graphene sandwiched by a pair of cation-anion molecules is a semiconductor with a moderate energy gap of…
Understanding how nanoscale interfaces affect electrical and optical properties of multifunctional nanocrystal heterostructures is of paramount importance for their technological application. In this context, we investigated the ultrafast carrier dynamics of rodlike gold–iron oxide nanocrystal heterodimers, in a spect…
The solution structure of IlvN, the regulatory subunit of Escherichia coli acetohydroxyacid synthase I, in the valine-bound form has been determined using high-resolution multidimensional, multinuclear nuclear magnetic resonance (NMR) methods. IlvN in the presence or absence of the effector molecule is present as a 22…
Sensor development has been reliant on planar Au and Ag nanoparticle research. The current findings explored a unique 3-D network of crystalline TiO2 nanoparticles linked as nanofibers. In addition to the favorability of using TiO2 for chemical and bio-molecular sensing, the nanofiber network provides molecular diffus…
Taking plasma-enhanced chemical vapor deposited porous SiOCH (p-SiOCH) and octadecyltrichlorosilane (OTS) as model cases, this study elucidates the chemical reaction pathways for alkyl-based self-assembled monolayers (SAMs) on porous carbon-doped organosilica films under N(2)-H(2) vacuum plasma illumination. In contra…
This paper presents measurements and analysis of the quantum efficiency (QE) and intrinsic emittance of Cu and CsBr coated Cu photocathodes. The data analysis uses expressions for the quantum efficiency and the intrinsic emittance for metal cathodes previously derived from Spicer's three-step model of photoemission. D…
This study demonstrates the application of two different methods to evaluate the kinetics of O 2 - and NO 2 -based oxidation of carbonaceous matter. The influence of reactor setup and experiment execution on the accuracy and interpretation of the kinetic parameters is also discussed. The fundamental difference between…
We report evolution of the two-dimensional electron gas behavior at the NdAlO3/SrTiO3 heterointerfaces with varying thicknesses of the NdAlO3 overlayer. The samples with a thicker NdAlO3 show strong localizations at low temperatures and the degree of localization is found to increase with the NdAlO3 thickness. The T−1…
A magnetoelectric laminate composite based on length-magnetized Terfenol-D alloy and width-polarized ternary 0.35Pb(In1/2Nb1/2)O3-0.35Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 single crystal has been developed and exhibits a giant magnetoelectric voltage coefficient of 1.7 V/Oe at low frequencies and 20 V/Oe at resonance frequency…
To elucidate the intrinsic characteristics and limits of nanostructured solar cells, it is necessary to initiate studies of exploiting single nanostructures as photovoltaic elements. It is interesting to develop simple and effective methods to construct single nanostructured solar cells. In this paper, we synthesized…
Anionic hydrated titanate (H(n)TiO(m): HTO) nanosheets and cationic magnesium-aluminum layered double hydroxide (Mg-Al LDH) nanosheets were electrophoretically deposited on positively and negatively charged indium tin oxide (ITO)-coated glass substrates, respectively. The HTO nanosheets and Mg-Al LDH nanosheets obtain…
We have measured the spin-wave spectrum of the half-doped bilayer manganite Pr(Ca,Sr)(2)Mn(2)O(7) in its spin, charge, and orbital ordered phase. The measurements, which extend throughout the Brillouin zone and cover the entire one-magnon spectrum, are compared critically with spin-wave calculations for different mode…
Thermal resistance of fabrics is an important property influencing an ability of fabrics to protect the human body against cold. In this paper the model of the thermal resistance of woven fabrics is elaborated. Next, an experimental verification was carried out on the basis of the results for 26 cotton woven fabrics o…
Anionic dicyanocuprate(I) ions in nano and bulky crystals have been investigated. The doped nanosystems show unusual photophysical properties such as multiple emission bands, thermochromism, and optical memory. In contrast, NaCu(CN) 2 and KCu(CN) 2 have different polymeric structures and exhibit only a single emission…
Abstract Stannyl‐substituted [(RZn) 4 (OR′) 4 ] cubanes with different tin‐containing alkoxy groups [Ph 3 SnOZnMe] ( 1 ), [Ph 3 SnOZnEt] ( 2 ), [Me 3 SnOZn t Bu] ( 3 ), and [Ph 3 SnOZn t Bu] ( 4 ) are easily accessible by Brønsted acid–base reaction of the corresponding triorganotin hydroxides with ZnMe 2 , ZnEt 2 , a…
The formation of Cu dimers on the ZnO(10$\overline{1}$0) surface has been studied using hybrid density functional theory. Depending on the adsorption site, Cu atoms are found to adsorb with either oxidation state 0 or $+$1. In the latter case, the Cu atom has donated an electron to the ZnO conduction band. The two mod…