Materials Literature
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From an experimental point of view, room-temperature ferroelectricity in $\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}$ is raising many questions. Electric measurements made a long time ago on solid solutions of $\mathrm{Bi}\mathrm{Fe}{\mathrm{O}}_{3}$ with $\mathrm{Pb}(\mathrm{Ti},\mathrm{Zr}){\mathrm{O}}_{3}$ indicate tha…
For the past few decades, there has been a considerable research interest in the area of drug delivery using particulate delivery systems as carriers for small and large molecules. Particulate systems like nanoparticles have been used as a physical approach to alter and improve the pharmacokinetic and pharmacodynamic…
라디오파 마그네트론 스퍼터링 방법으로 유리 기판 위에 Al 도핑된 ZnO (AZO) 박막을 성장시켰다. 증착시 스퍼터링 가스로 사용하는 산소 유량비의 변화에 따른 AZO 박막의 특성을 X-선 회절법, 원자 주사 현미경, 홀 효과 측정법으로 조사하였다. 증착 온도 <TEX>$400^{\circ}C$</TEX>에서 산소 유량비 0%로 증착된 AZO 박막은 가장 큰 c-축 우선 배향성과 최저의 비저항값 <TEX>$6.9{\times}10^{-4}{\Omega}cm$</TEX>을 나타내었다. 산소 유량비가 증가함에 따라 ZnO (002)면의 회절 피크의 세기는 실질적으로…
In this letter, the authors propose an optical configuration for the reflective liquid crystal (LC) cell with single polarizer, which can show the wideband property for high contrast in oblique incidence. The cell consists of a biaxial, a half-wave retarder, a quarter-wave LC cell, and a positive C plate in addition t…
A photodetector, comprising a layer of silicon nanocrystals that is sandwiched between two electrodes, is proposed and demonstrated in a photosensing application on low-temperature polysilicon panels. Laser annealing of silicon-rich oxide films can form nanocrystals that respond optimally to a certain absorption spect…
The frictional wear characteristics of Ti-29Nb-13Ta-4.6Zr alloy subjected to solution treatment (referred to as TNTZ(ST)) and aged at 598, 673 and 723 K after solution treatment (referred to as TNTZ(598K), TNTZ(673K) and TNTZ(723K), respectively) were investigated in air and a simulated body environment (Ringer's solu…
Abstract With a small amount of isocyanate‐terminated polysulfide (NCO‐PSF‐NCO) as additive, the commercial polysulfide‐based sealant had significant improvement in mechanical properties. The test results showed that 5% of NCO‐PSF‐NCO could help to rise 50% in the tensile strength and 27% in the ultimate elongation of…
Abstract The synthesis and characterization of two symmetrical Fe II complexes, [FeL B4 (NCS) 2 ], 1 , and [FeL B5 (NCS) 2 ], 2 {L B x = N , N ′‐bis[(2‐ N ‐R‐imidazol‐1‐yl)methylene]‐2,2‐dimethylpropane‐1,3‐diamine ligands; 1 : x = 4, R = H; 2 : x = 5, R = Me} are reported. Whereas the tetradentate ligand L B4 is plan…
Activated carbon fibers (ACFs), comprising a three-dimensional disordered network of metallic nanographite domains, have huge specific surface areas due to the presence of nanosized pores (nanopores) surrounded by nanographite domains. Around the edge of the nanographene sheets, there are localized spins originating f…
This paper investigated the potential use of silica nanoparticles (SNPs) as pseudostationary phase (PSP) for protein separation. The wall adsorption of SNPs as well as the influences of SNPs and poly(ethylene oxide) (PEO) were studied. The SNPs showed selectivity toward the proteins, and the concentration ratio of SNP…
Laser induced high frequency acoustic wave generation, propagation, and focusing in water are studied. A large area, flat, and short duration acoustic wave was generated by the thermoelastic interaction of a homogenized short pulsed laser beam with the liquid-solid interface and propagated at the speed of sound. Laser…
Abstract Kinetics of the decay of methyl cellulose‐manganate(VI) intermediate polysaccharide [MC‐MnO ] have been followed spectrophotometrically in different strong basic solutions at different temperatures, as well as, in the presence of different concentrations of perchlorate salt. The reaction is base‐catalyzed. Sa…
The optical gap between dangling-bond states has been measured on a single-domain diamond C(111)-2 × 1 surface. The experimental result is 1.47 eV. Such a large surface gap (even larger if excitonic effects are considered) so far has not been obtained by state-of-the-art band calculations and its physical origin is st…
Abstract Zintl phase compounds with large unit cells and complex anionic structures such as Yb 11 Sb 10 hold potential for being good thermoelectric materials. Single crystals of Ge‐doped Yb 11 Sb 10 were synthesized using a molten Sn‐flux technique. Single crystal X‐ray diffraction data were obtained and resulted in…
Microstructures of coherent phase decomposition near morphotropic phase boundary in lead zirconate titanate are investigated by using computer modeling and simulation. The model is based on the recently proposed incoherent equilibrium phase diagram [G. A. Rossetti, Jr. et al., Appl. Phys. Lett. 88, 072912 (2006)] and…
The authors report on the optical and magnetic properties of GaN epilayers, grown by metal-organic chemical vapor deposition, with in situ Er doping at concentrations up to ∼1021cm−3. Using ultraviolet laser excitation, all samples exhibited photoluminescence near 1540nm with the integrated intensity approximately pro…
The authors demonstrate that energetic argon ions introduce phase transformation of a diamond- like carbon film. Inside an ultrahigh vacuum chamber, energetic Ar ions of 5keV were generated using an x-ray photon spectroscopy. After ion bombardment, x-ray photon spectroscopy (XPS) and friction tests were conducted in s…
Abstract Polyaniline, which is soluble in common organic solvents, has been synthesized through the oxidative chemical polymerization of aniline in the presence of benzene diazonium chloride salt in an aqueous HCl acid medium. The blue‐black polyaniline thus prepared exists in a lower oxidation state than emeraldine.…
Environmental scanning electron microscopy (ESEM) enables electron imaging of gas-mediated, direct-write nanolithography processes, liquids, and hydrated biomaterials. However, ESEM is limited by poor image quality at gas pressures in excess of ∼600Pa. Here the authors achieve high quality secondary electron imaging a…
The transport property of the La 0.7 Sr 03 MnO 3 /Si heterostructure was investigated theoretically by applying the drift-diffusion model to the present system. A simple scenario of the semiconductor band and electric field at the interface region of the heterostructure with various bias voltages are presented. The go…