Materials Literature
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The differential cross sections of quasi-elastic scattering at backward angles were measured with high precision for $^{32}\mathrm{S}+^{90,96}\mathrm{Zr}$ around the Coulomb barrier, and barrier distributions were extracted from the measured excitation functions. The experimental barrier distribution of $^{32}\mathrm{…
Abstract Poly( L ‐lactic acid) (PLLA) filament fibers were prepared by one‐step melt spinning process and the effects of variations in take‐up speed on their thermal properties, mechanical properties, and crystalline structures were investigated. Differential scanning calorimetry (DSC) results revealed that the PLLA f…
4 pages.-- Supporting Information Available: Details of synthesis and \ncharacterization of polymers as well as the structural SAXS results. This material is available free of charge via the Internet at http://pubs.acs.org.
Vesikelaggregate mit pH-abhängigen Membrankanälen in den Vesikelwänden (siehe Bild) wurden in zwei Stufen durch Emulgieren von Copolymeren aus Acrylsäure und dem Acrylat von 1,2-Distearoyl-rac-glycerin erhalten. Die Aggregate ahmen eukaryotische Zellen nach, die funktionelle Organellen in den Zellwänden enthalten.
We present a method for the synthesis of soluble and processable 3,4-alkylenedioxypyrrole (XDOP)-based conjugated polymers via an iododecarboxylation−deiodination polymerization methodology. Polymerization to the respected PXDOP derivatives of suitably high molecular weight (3.8−14.2 kDa vs polystyrene as measured by…
Hollow polymer microparticles with a single opening on the surface were formed by freeze-drying aqueous polymer colloids swollen with solvent. The results show that the particle morphology is due to phase separation in the polymer emulsion droplets upon freezing in liquid nitrogen, and that morphological changes are d…
The very efficient end-bridging Monte Carlo (EBMC) method has been employed in order to simulate an amorphous, polydisperse 80-chain large C 156 polyethylene (PE) system in atomistic detail over a wide range of temperatures (from 600 down to 150 K) and determine its glass transition temperature ( T g ). Two sets of si…
Cu2HgI4 powder has been prepared by precipitation from reactive chemical solutions. An electron beam gun evaporation system was used to deposit the prepared powder in a thin film form onto a Corning 7059 glass substrate. The x-ray diffraction study reveals that the as-deposited films are polycrystalline in nature and…
The compositional dependence of structural and elastic properties of Ca 2+ substituted manganite perovskite system with a general formula La 1− x Ca x MnO 3 ( x = 0.00, 0.25, 0.33, 0.50 and 1.00) have been studied by means of x-ray diffraction, scanning electron microscopy and ultrasonic pulse transmission technique a…
Recently, we demonstrated via large-scale molecular dynamics simulations a "coexistence period" in polymer melt ordering before crystallization, where nucleation and growth mechanisms coexist with a phase-separation mechanism [Gee et al., Nat. Mater. 5, 39 (2006)]. Here, we present an extension of this work, where we…
The bundling of densely packed free-standing nanorods/nanotubes in a liquid environment, or the 'nanocarpet effect', has a direct impact on the stability of nanostructures used for chemical and biological sensors. Using glancing angle deposition, we prepared four different structures: vertically aligned, tilted, zigza…
In the paper by H. Hamamoto, Y. Suzuki, H. Takahashi, and S. Ikegami in Issue 17–18, 2007, pp. 2685–2689 (DOI: 10.1002/adsc.200700114), author Yachiyo Suzuki should have an “a” after his name indicating his affiliation. In Figure 3 on page 2687, the quadrangle at the top of the A column at 70° C should have bold sides…
Phase stability and compressibility of rare earth zirconates with the defect-fluorite structure were investigated by in situ synchrotron x-ray diffraction. A sluggish defect-fluorite to a cotunnitelike phase transformation occurred at pressures of ∼22 and ∼30GPa for Er2Zr2O7 and Ho2Zr2O7, respectively. Enhanced compre…
Silica tubes (T-silica) with uniform size and large aspect ratios were synthesized by hydrolyzing tetraethyl orthosilicate using d, l -tartaric acid as a template. The prepared silica tubes have a diameter of about 200–400 nm and a length of about 40−100 µm; hence, their aspect ratios range from 100 to 500. The inner…
Fast neutral beams (beam energy of tens to hundreds of eV) may be useful for mitigating charging damage that can occur in conventional plasma processing of materials. For neutral beam processing to be viable, however, the beam energy, flux and directionality must be comparable to those in traditional reactive ion etch…
An easy calibration method based on the Langmuir adsorption theory is proposed for a carbon nanotube field-effect transistor (NTFET) biosensor. This method was applied to three NTFET biosensors that had approximately the same structure but exhibited different characteristics. After calibration, their experimentally de…
A first principles calculation is used to simulate the variation of the lattice constant, structure, induced charge-density difference, total energy, and band gap of the hexagonal and cubic MgZnO semiconductor alloys with different MgO mole fractions. The calculated results show that the lattice constant and the ratio…
A simple, versatile, and fast laser-assisted chemical vapor deposition (LCVD) technique that produces linear arrays of Zn and ZnO nanoparticles on a silicon substrate, covering an extended region, is described. A series of consecutive steps is involved in the synthesis and alignment of Zn/ZnO nanoparticles. First, a L…
A rad. dad: The electronic structure of [Fe(dad)3][Fe(pda)2] was investigated by X-ray crystallography, Mössbauer spectroscopy, and magnetic susceptibility measurements as a function of the temperature. Reversible one-electron transfer from the dianion (high-spin FeII) to the dication (low-spin FeII) generates a monoa…
Utilizing the significant shape recovery ability (in the order of 100% strain) in shape memory polymers (SMPs), we propose two simple approaches, namely laser heating and indentation, to produce micro-sized protrusion arrays. In the former, after local laser heating a pre-compressed SMP, protrusive bumps can be produc…