Materials Literature
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We deposit Au films on single crystal sapphire substrates by sputtering and evaporation methods. The microstructure characteristics such as crystal textures, grain sizes, and fraction of contacted area of the films are examined by x-ray diffraction and transmission electron microscopy. The sputtered films have an aver…
Suppression of the glass transition by some tens of degrees within a few tens of nanometers of a free surface in a polymer film is a technologically important, commonly observed, as-yet poorly understood phenomenon. We construct a quantitative theory of the influence of the free surface via transmission of “kinks” or…
Vertically grown TiO 2 -nanotubes (TiO 2 -NT) on a Ti metal substrate synthesized by electrochemical anodization followed by calcination have been studied using X-ray absorption near-edge structures (XANES) and X-ray excited optical luminescence (XEOL). It is found that the TiO 2 -NT system undergoes a series of phase…
The influence of Pt, tin-doped In2O3, and RuO2 electrodes on the electrical fatigue of bulk ceramic Pb(Zr,Ti)O3 (PZT) has been studied. Schottky barrier heights at the ferroelectric/electrode interfaces vary by more than one electronvolt for different electrode materials and do not depend on crystallographic orientati…
Thin films of Ge1−xMnx containing Mn-rich nanostructures, so called nanocolumns, are grown by molecular-beam-epitaxy at low growth temperature (Tg) on Ge(001) substrate. Depending on the growth temperature, these nanocolumns can be either crystalline or amorphous. A quantitative study of magnetic anisotropy of these n…
Hollow or dense silica spheres were synthesized by the hydrolysis-condensation of tetraethoxysilane templated by an ionic liquid crystal. A hydrolysable silylated analog of these ionic liquid crystals was also submitted to a sol–gel reaction in a binary toluene–water mixture, yielding hybrid vesicles. All the material…
The structure of the 24 kDa cysteine protease saru-actinidin from the fruit of Actinidia arguta Planch. (sarunashi) was determined by the cadmium/sulfur-SAD method with X-ray diffraction data collected using in-house Cu Kα and Cr Kα radiation. The anomalous scatterers included nine sulfurs and several cadmium ions fro…
Two novel sandwich-type mixed (phthalocyaninato)(porphyrinato) rare earth double-decker complexes with decreased molecular symmetry of Cs M(Pc)[D(NHC(8)H(17))(2)PP] [M = Eu, Lu; Pc = unsubstituted phthalocyaninate; D(NHC(8)H(17))(2)PP = 5,10-di(phenyl)-15,20-di(4-octylamino-phenyl)porphyrinate] (1, 2) have been design…
Structural, magnetic, and electronic transport properties of Bi0.6−xLaxCa0.4MnO3 (0≤x≤0.6) manganites have been studied systematically. The parent compound exhibits robust charge ordered antiferrromagnetic (COAFM) phase with TCO∼293 K and AFM Néel temperature TN∼149 K. The sample with x=0.1 show a M(T) curve of “arch…
An ambient water nanofilm condensed on a solid surface provides a good model system to study the self-assembling behaviors of peptides in a confined environment. In this paper, the self-assembly of three short amyloid-related peptides in a water nanofilm confined on a mica substrate was studied using drying microconta…
By means of first principles calculations we show that morphology of TiO 2 nanowires in the rutile phase turns out to be important in their stability and band gap engineering. The most stable ⟨001⟩-oriented TiO 2 nanowires are found to display the {110} facets while the most thermodynamically favorable nanowires with…
Abstract To improve the physical properties of poly(trimethylene terephthalate) (PTT), a series of nanocomposites based on PTT and exfoliated graphite (EG) are prepared via melt compounding and their structures, thermal stabilities, mechanical, and electrical properties are studied. XRD and SEM show that graphene nano…
The static and dynamic polarizabilities for the lowest-energy structures of pure aluminum clusters up to 31 atoms have been investigated systematically within the framework of density functional theory. The size evolution of several electronic properties such as ionization potential, electron affinity, the energy gap…
Incorporation of Zn(2+) into bayerite results in the formation of a cation-ordered layered double hydroxide (LDH) of monoclinic symmetry in which about half the vacancies of Al(OH)(3) are occupied by Zn(2+) giving rise to positively charged layers. Charge compensation takes place by the incorporation of sulfate ions i…
A series of repeating sequence poly(lactic-co-glycolic acid) copolymers (RSC PLGAs) has been prepared with the precise incorporation of a pendant benzyl-ether substituted monomer derived from serine. Copolymers were synthesized from the assembly of sequence-specific, stereopure dimeric, and trimeric segmers of lactic,…
This paper describes the synthesis of intermetallic Pt/Bi and Pt/Pb nanoparticles (NPs) using water-in-oil (w/o) microemulsions (μe) as template. For that purpose, w/o-microemulsions containing H 2 PtCl 6 + Pb(NO 3 ) 2 and H 2 PtCl 6 + Bi(NO) 3, respectively, were mixed either with a w/o-microemulsion containing the r…
Templation in liquid ammonia: The first porous materials formed by templating in liquid ammonia utilize the liquid-crystalline phase formed by cellulose/NH4SCN in NH3. By changing the proportions of reactants, the porosity, surface area, and morphology of the materials can be modified. The as-synthesized mesoporous ma…
Quaternary-alloyed Zn x Cd 1− x S y Se 1− y arrays were prepared from four precursor aqueous/glycerol (3:1) solutions with a robotic piezoelectric dispenser on fluorine-doped tin oxide (FTO) conductive glass. Hydrazine (N 2 H 4 ) was used for protecting the selenium source, dimethylselenourea, from oxidation so that f…
We are interested in developing peptide/polymer hybrid hydrogels that are chemically diverse and structurally complex. Towards this end, an alanine-based peptide doped with charged lysines with a sequence of (AKA(3)KA)(2) (AK2) was selected from the crosslinking regions of the natural elastin. Pluronic(®) F127, known…
The main goal of this investigation is to analyze the electron donor−acceptor properties of planar and three-dimensional gold clusters (Au N (with N = 2−20), and for this purpose, a new simple model based on density functional theory is used. Calculations at the B3LYP level permit us to determine the electrodonating (…