Materials Literature
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Abstract Smectic‐A elastomers combine the positional long‐range order of mesogenic molecules in one dimension with the rubber elasticity of a polymer network. Upon mechanical deformation, completely different responses of the phase structure have been reported. We present a highly distorted system which shows a breakd…
The pair correlation function for Ge x Se 1− x alloys near the intermediate phase (IP) is reported. First-principles MD models of these alloys show a 'self-organized' phase associated with the number of Ge bonds with twofold Se atoms. This probably represents the IP of Boolchand. The self-organization involves maintai…
Kompositgarne: Ein biomimetischer Ansatz zur Synthese von hierarchisch strukturierten Siliciumoxidkompositfasern ist dem Prozess der Bioglasbildung nachempfunden. Die Fasern, die zur Bündelbildung neigen (siehe Bild), entstehen innerhalb von Sekunden durch Selbstorganisation von Peptid-Polymer-Nanobändern in Kombinati…
The intercalation of vanadium pentoxide by lithium ions leads to a change in optical properties, a process that is of value in thin-film electrochromic devices. In this study, films of V2O5, deposited on indium tin oxide (ITO) glass coupons by a sol-gel process, were challenged by increasing numbers of charge-discharg…
Abstract Summary : A series of ethylene homopolymers and ethylene/1‐hexene copolymers with different molecular weight distributions (MWD) and chemical composition distributions (CCD) was analyzed by crystallization analysis fractionation (Crystaf) at several cooling rates to investigate the effect of MWD, CCD, and coo…
The geometrical stability of the three lattices of the cubic crystal system, viz. face-centered cubic (fcc), body-centered cubic (bcc), and simple cubic (sc), consisting of bimodal discrete hard spheres, and the transition to amorphous packing is studied. First, the random close packing (rcp) fraction of binary mixtur…
The present study reports the dielectric study of a ferroelectric liquid crystal (FLC) material Felix 016/030 showing anomalous dielectric behavior. This anomalous behavior is explained on the basis of a model of dynamically fluctuating mixture of two interconvertible conformers, whose relative density changes with th…
In protein crystallization, post-translational modifications are often considered an annoyance. They are expected to introduce microheterogeneity into the protein and, in addition, in the case of the larger chemical modifications such as glycosylation, to increase surface entropy. On the one hand, these phenomena are…
We have used the aerodynamic levitation technique combined with CO 2 laser heating to study the structures of liquid CaAl 2 O 4 and MgAl 2 O 4 with x-ray and neutron diffraction. We determined the structure factors and corresponding pair correlation functions describing the short- and intermediate-range order in the l…
We describe a novel solution-based acoustic manipulation technique for the parallel alignment of carbon nanotubes on solid substrates. The acoustic radiation force and acoustic streaming, which are generated from the transmission of ultrasound through a fluid, facilitate the mobility of the nanotubes and result in the…
Abstract Summary: The incorporation of comonomer molecules in the backbone of a homopolymer can influence the final properties of the material, decreasing its crystallinity and the melting and glass transition temperatures, and increasing its impact resistance and transparency. In the present work, ten ethylene/propyl…
The light-induced controlled release of fragrances from photolabile 2-oxo-(2-phenyl)acetates via Norrish Type II photofragmentation was evaluated by irradiation of the precursors in different solvents and on cotton in a typical fabric softener application. The desired photooxidation was found to work efficiently in wa…
In the presence of Joule heating, the electronic temperature in a metallic resistor placed at sub-Kelvin temperatures can significantly exceed the phonon temperature. Electron cooling proceeds mainly through two processes: electronic diffusion to and from the connecting wires and electron-phonon coupling. The goal of…
Abstract Li 2 O–CaF 2 –P 2 O 5 glasses mixed with different concentrations of NiO (ranging from 0 mol% to 2.0 mol%) were crystallized. The samples were characterized using X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy and differential thermal analysis. Studies were extende…
The electronic and magnetic properties of one-dimensional titanium chains adsorbed on semiconducting armchair graphene nanoribbons (GNRs) are studied using the density functional theory. The results show that the strong hybridization between the titanium chain and the GNR gives rise to ferromagnetism and metallicity o…
Molecular systems designed for the conversion of solar energy offer ideal models in the study of the kinetics of light-induced electron transfer at surfaces. Due to their high porosity, nanocrystalline oxide semiconductor films allow investigations of interfacial and lateral charge transfer processes that are barely d…
An amphiphilic fluorescent catalyst Q9[EuW10O36] (Q = [(C18H37)2N+ (CH3)2]), assembled in the interface of emulsion systems, was directly imaged by fluorescence microscopy; the catalyst shows high selectivity and activity in the oxidation of alcohols using H2O2 as oxidant and the catalyst can be easily separated and r…
The irreversible loss of surface enhanced Raman spectroscopy (SERS) intensity derived from electrostatically immobilized Au colloidal substrate is studied. The total intensity of the SERS scattering from crystal violet molecules adsorbed onto the substrate was monitored for up to 240 s under continuous laser irradiati…
Two in one. Multifunctional hollow-type gold nanostructures that encapsulate iron oxide nanoparticles have been developed for biomedical imaging and targeted cancer therapy applications. The combination of the magnetic character of iron oxide nanoparticles with the near-infrared-light-absorbing (and scattering) gold n…
Gold nanoparticles surface-coated with thyminethiol derivatives containing long hydrocarbon chains have been prepared. The diameter of the particles is 2.2 and 7.0 nm, respectively, with a relatively narrow size distribution. Thyminethiol derivatives are attached to the gold particle surfaces with thymine moieties as…