Materials Literature
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Here, we report on the in situ synchrotron inelastic x-ray scattering spectra of Na-borate glasses at high pressure up to 25 GPa. The pressure-induced boron coordination transformation from $^{[3]}\text{B}$ to $^{[4]}\text{B}$ is linear with pressure characterized by a single value of ${(\ensuremath{\partial}\text{ }^…
The structural stability of Mg(BH 4 ) 2, a promising hydrogen storage material, under pressure has been investigated in a diamond anvil cell up to 22 GPa with combined synchrotron X-ray diffraction and Raman spectroscopy. The analyses show a structural phase transition around 2.5 GPa and again around 14.4 GPa. An ambi…
The alloy Zn 41 Sb 59 was synthesized by high-pressure techniques and its bulk amorphous nature at ambient conditions confirmed by X-ray powder diffraction and electron microscopy studies. Electrical resistivity, thermopower, and thermal conductivity of Zn 41 Sb 59 were measured in a temperature range from 6 to 350 K.…
The edge states and optical transition energies in carbon nanoribbons are investigated with density-functional calculations. While the ground state of zigzag ribbons is spin polarized, defects at the edges destroy spin polarization and lead to a nonmagnetic ground state. Scanning tunneling spectroscopy will thus show…
Abstract Phase separation of polystyrene (PS) and poly(methyl methacrylate) (PMMA) blends was used as a means to segregate PS‐ or PMMA‐functionalized single‐walled carbon nanotubes (SWNTs) in thin films. Dilute solutions (5 wt % in THF) of 1:1 PS/PMMA blends containing the functionalized nanotubes were spin cast and a…
Abstract Poly(ε‐caprolactone) (PCL) and poly(lactic acid) (PLA) networks were prepared from macromonomer diols functionalized with methacrylic anhydride, which allows one to get self‐crosslinkable polymers. Besides, both macromonomers were copolymerized to get copolymer networks with different compositions (namely, PC…
The surface morphology and microstructural characteristic of ZnTe, CdTe and ZnS thin films obtained by close-spaced sublimation technique were investigated. The structural features of layers were examined by XRD, SEM and optical microscopy. Size of coherent scattering regions, lattice microstrain and stacking fault de…
Photochromic diarylethene derivatives having different lengths and numbers of poly(ethylene glycol) side chains were synthesized and their photochromic property and self-assembling behavior were investigated. The self-assembling behavior of the derivatives strongly depends upon the ratio between the hydrophobic core a…
The structure and collective dynamics at local length scales of poly(vinyl acetate) (PVAc) have been investigated by combining neutron scattering on a deuterated sample and fully atomistic molecular dynamics simulations. The experimental data have provided microscopic information at molecular level and a critical chec…
One-dimensional ZnO nanostructures have been in situ grown on the conductive brass substrate by directly heating the Cu 0.70 Zn 0.30 alloy foils in O 2 /Ar at 550−900 °C. The growth process and products have been well characterized by means of X-ray diffraction, Raman scattering, electron microscopy, X-ray photoelectr…
Protein kinases have emerged as a major drug target in the last years. Since more than 500 kinases are encoded in the human genome, cross-reactivity of a majority of kinase inhibitors causes problems. Tools are required for a rapid classification of inhibitors according to their affinity for a certain target to refine…
Diblock polyampholyte brushes with different block sequences (Si/SiO2/poly(acrylic acid)-b-poly(2-vinylpyridine) (PAA-b-P2VP) brushes and Si/SiO2/P2VP-b-PAA brushes) and different block lengths were synthesized by sequent surface-initiated atom transfer radical polymerization (ATRP). The PAA block was obtained through…
Binäre Kolloidpartikel mit bestimmter Morphologie (siehe Bilder: lineare Segmente, Dreiecke, Tetraeder, Oktaeder und quadratische Antiprismen) wurden durch Emulsionspolymerisation von Styrol in Gegenwart von Siliciumoxid-Keimkristallen erhalten. Die Formen entstehen als Folge der Minimierung eines Energieterms, der di…
A hybrid nanomaterial composed of ZnO nanoparticles (NPs) and CuTCNQ (copper 7,7,8,8-tetracyanoquinodimethane) nanowires (NWs) was successfully fabricated in a simple solution method. The electron field emission properties of the hybrid NWs were dramatically improved over those of raw CuTCNQ NWs. The maximum current d…
Ball-in-shell structured TiO 2 nanospheres were successfully made by flame synthesis—a single-step, continuous, and scalable process. The morphology and structure were systematically characterized by X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, transmission electron microscop…
We have demonstrated that nanostructures, and in particular nanorings incorporating a homodimeric enzyme, can be prepared by chemically induced self-assembly of dihydrofolate reductase (DHFR)-histidine triad nucleotide binding 1 (Hint1) fusion proteins. The dimensions of the nanorings were found by static light scatte…
Amphiphilic triblock copolymers of methoxy-poly(ethylene glycol)-poly(L-lactide)-poly(L-lysine) (MPEG-b-PLLA-b-PLL) (Mn=8540-22 240) were synthesized through the ring-opening polymerization of Nepsilon-(Z)-lysine-N-carboxyanhydrides (N(epsilon)-(Z)-Lys-NCA) using MPEG-b-PLLA-NH2 as a macroinitiator. The triblock copol…
The temperature dependence of continued single-walled carbon nanotube (SWNT) growth on an iron cluster is investigated using quantum chemical molecular dynamics simulations based on the density functional tight-binding method. As a model system for continued SWNT growth, a (5,5) armchair-type SWNT seed attached to an…
In a model reaction to demonstrate the presence and reactivity of sp 2 C−H, the primary particles (∼5 nm) of detonation nanodiamond (DND) were arylcarbonylated with 2,4,6-trimethylphenoxybenzoic acid in polyphosphoric acid (PPA) via a Friedel−Crafts reaction. The possibility of grafting primary DND particle was suppor…
Transparent polymer nanocomposites with high ZnS nanophase contents were prepared by a facile one-pot route. Compared with other methods, this method is easier to control. The structure, morphology, thermal and optical properties of the obtained nanocomposites were characterized. The results showed that the ZnS nanopa…