Materials Literature
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Size-selected Pt(n) (n=4,7-10,15) clusters were deposited on TiO(2)(110)-(1x1) surfaces and imaged at atomic resolution using an ultrahigh-vacuum scanning tunneling microscope with a carbon nanotube tip. Clusters smaller than Pt(7) lay flat on the surface with a planar structure and a planar-to-three-dimensional trans…
Purely semiconducting single-walled carbon nanotubes (s-SWNTs) with a narrow diameter distribution have been produced for HiPco SWNTs. A facile technique combining microwave irradiation with mixed-acid-assisted dispersion has proven efficient for enrichment of s-SWNTs. Using this process, both electronic type-dependen…
Abstract Monovinylheptaisobutylsilsesquioxane undergoes efficient cross‐metathesis and silylative coupling with styrenes. Allyl derivatives were successfully tested in cross‐metathesis in the presence of first generation Grubbs’ catalyst, while heteroatom‐substituted vinyl derivatives (vinyl ethers, 9‐vinylcarbazole)…
The oil-repellent performance of a poly(dimethylsiloxane)-based biomimetic replica (PDMS-replica) was tuned by modifying its surface chemical composition. PDMS-replica possessing a complementary combination of hierarchical roughness and mixed -CF(3) and -SiCH(3) terminal functionality was prepared in the presence of a…
A novel method for the fabrication of carbon nanotube (CNT)-conducting polymer composites is demonstrated by conformally coating extremely high aspect ratio vertically aligned-CNT (A-CNT) arrays with conducting polymer via oxidative chemical vapor deposition (oCVD). A mechanical densification technique is employed tha…
Colloidal silica spheres and their assembly processes are encountered in nature and numerous technological applications. We report here a novel and facile method to prepare highly anisotropic one-dimensional (1D) arrays of silica nanospheres (SNSs) in the liquid phase. Uniform-sized SNSs ca. 15 nm in size assemble int…
The intermediate scattering function, I(Q,t), of proton-conducting hydrated BaZr0.90Y0.10O2.95 is explored for temperatures in the range 473−650 K and momentum transfers Q = 0.15−0.3 Å−1. The exponential decay of I(Q,t) suggests that the long-range self-diffusion of protons, which occurs as a series of proton transfer…
This Article describes a facile method to prepare smooth and homogeneous polymer brush surfaces of variable grafting density from a solid surface by combining Langmuir-Blodgett (LB) deposition with surface-initiated atom transfer radical polymerization (SI-ATRP). This method is successfully demonstrated by the prepara…
Abstract We present an ab initio study of the graphene quasi‐particle band structure within GW approximation. In particular we studied the renormalization of the Fermi velocity v F as function of the electrostatic doping. We show that within local density approximation (LDA) the Fermi velocity is substantially renorma…
The transformer manufacturing cost minimisation (TMCM), also known as transformer design optimisation, is a complex constrained mixed-integer non-linear programming problem with discontinuous objective function. This paper proposes an innovative method combining genetic algorithm (GA) and finite element method (FEM) f…
Electrocaloric effect (ECE) in $({\text{Ba}}_{0.5}{\text{Sr}}_{0.5}){\text{TiO}}_{3}$ ferroelectric alloys is calculated from first principles using a computational scheme that combines canonical and microcanonical Monte Carlo simulations. Our results are in very good agreement with the available experimental data and…
Antiestrogenic compounds were investigated from Thai indigenous plants for galactogogues since estrogen is reported to suppress lactation in breastfeeding women. The aerial parts of the Thai medicinal plant Capparis flavicans, which has traditionally been used to promote lactation, gave the new compound capparoside A…
We evaluated the difference between randomly packed NCs (disordered films), periodic films, and three-dimensional crystals in terms of their lattice structure and interparticle spacing using time-resolved small-angle X-ray scattering (SAXS) technique. The work was performed on nanocrystal solids formed by 7 nm PbS nan…
A new family of persistent luminescence phosphors, Lu 2 O 3:Tb 3+,M 2+ (M = Ca, Sr, Ba), was found and the materials’ most important spectroscopic properties related to the persistent luminescence phenomenon were reported and discussed. The persistent luminescence seen by the naked eye in the dark lasted for at least…
Optical gain in strongly confined colloidal semiconductor quantum dots is measured using state resolved pump/probe spectroscopy. Though size tunable optical amplification has been previously reported for these materials, the influence of confinement enhanced multiexcitonic interactions has limited prior demonstrations…
A new type of binuclear superalkali B(2)Li(11) and its corresponding cation B(2)Li(11) (+) were theoretically predicted based on the density functional theory calculations. B(2)Li(11) was found to have six minimum energy structures corresponding to five cation states exhibiting superalkali nature. The global minima of…
Highly dispersed supported gold offers unprecedented catalytic properties. Determination of the dependence of the catalytic properties on the gold nanocluster size requires the preparation of size-controlled gold nanoclusters on support surfaces with a high degree of uniformity. Starting from site-isolated mononuclear…
Cancer continues to be a major cause of morbidity and mortality worldwide. While discovery of new drugs and cancer chemotherapy opened a new era for the treatment of tumors, optimized concentration of drug at the target site is only possible at the expense of severe side effects. Nanoscale carrier systems have the pot…
Usando el modelo de unidades poliédricas de Hazen, y empleando un método de ajuste por mínimos cuadrados, se ha calculado la contribución de diecinueve unidades constituyentes a la energía libre y de otras quince unidades a la entalpía de los fosfatos minerales en condiciones termodinámicas normales (298 °K de tempera…
In this study, a large-scale superhydrophobic mat surface with an enhanced mechanical property by blending polystyrene (PS) and polyamide 6 (PA6) fibers was fabricated via a four-jet electrospinning technique. The achievement of surface superhydrophobicity of electrospun mat was ascribed to the combination of micro- a…