Materials Literature
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This paper provides a brief review of recently published work on biophysical and biological aspects of Auger processes. Three specific questions have been considered. (1) Does charge neutralisation contribute to molecular damage such as DNA strand breaks? (2) How many DNA double strand breaks are produced by a single…
Abstract The amount of glycine added, i.e., the glycine/oxide molar ratio, k , is optimized for synthesizing La 0.85 Sr 0.15 MnO 3‐δ (LSM) powders by a glycine‐nitrate process. The specific surface area of the resultant LSM powders increases with this ratio, which indicates the deviation of the required glycine from t…
The effect of memorizing the structural states in a ferroelectric liquid crystal (FLC), known as biand multistability, is based on the existence of a domain structure that changes its properties under the action of an applied voltage. The criterion for the bistability steadiness of the optical-transmission states of F…
The use of synchrotron radiation–based spectroscopy to investigate electronic and bonding structures of nanostructured materials is reviewed with focuses on the X-ray absorption spectroscopy (XAS), valence-band photoemission spectroscopy (VB-PES), and scanning photoelectron microscopy (SPEM) measurements. This review…
Abstract Summary: Poly(2‐methoxyaniline‐5‐sulfonic acid) (PMAS) is a water‐soluble derivative of polyaniline that carries negatively charged sulfonate groups. This self‐doped conducting polymer also behaves like a polyelectrolyte that can subsequently function as a dopant in polyaniline (PAn). The chemical synthesis o…
Abstract Summary: Thiol‐reactive‐functionality decorated multi‐walled carbon nanotubes (MWNTs) have been obtained. Trithiocarbonate‐ended poly( N ‐(2‐hydroxypropyl)methacrylamide) (PHPMA) is prepared by reversible addition‐fragmentation chain transfer (RAFT) polymerization of N ‐(2‐hydroxypropyl)methacrylamide (HPMA)…
Abstract We present ab initio methods to determine the Dzyaloshinskii–Moriya (DM) parameter, which provides the anisotropic effects of noncollinear spin systems. For this purpose, we explore various general spin orbital (GSO) approaches, such as Hartree–Fock (HF), density functional theory (DFT), and configuration int…
We report an experimental study of the collapse dynamics of smectic catenoids. It is shown that in dependence on the thickness of the smectic films, different rupture scenarios take place. The change of the film thickness during the collapse process is monitored using an interference technique. We separate influences…
Nuetron diffraction studies of high-pressure effects on the crystal and magnetic structure of A1-x A ′ MnO3 manganites (A = Pr, La; A′ = Sr, Ca, Na) are reviewed. High pressure leads to various changes in the magnetic structure of manganites: the appearance of a new A-type antiferromagnetic (AFM) state in compounds wi…
Abstract Summary: A PCL macromonomer was obtained by the reaction of PCL diol with methacrylic anhydride. The effective incorporation of the polymerizable end groups was assessed by FT‐IR and 1 H NMR spectroscopy. PCL networks were then prepared by photopolymerization of the PCL macromonomer. Furthermore, the macromon…
Complex hollow microcapsules were fabricated by adsorbing polyelectrolytes (PEs) onto CaCO3 particles doped with oppositely charged PEs, followed by dissolution of the CaCO3 particles with disodium ethylene diamine tetraacetate dihydrate (EDTA). The shells were formed in situ by complexation of the oppositely charged…
Effects of rising and falling stress intensity factor (K) profiles on the stress corrosion cracking (SCC) growth rates of stainless steel and nickel alloys has been studied in high-temperature water. Sophisticated test control software was used that changes loading (P) based on crack length (a) to achieve a specific K…
Abstract Silicone rubber is suitable for the thermal insulator of the rocket motors owing to its heat resisting properties as well as its excellent elasticity and restoring force. However, the adhesion properties of the silicone rubber should be improved greatly to be used as the thermal insulator because of its poor…
Plant monofunctional aspartate kinase is unique among all aspartate kinases, showing synergistic inhibition by lysine and S-adenosyl-l-methionine (SAM). The Arabidopsis genome contains three genes for monofunctional aspartate kinases. We show that aspartate kinase 2 and aspartate kinase 3 are inhibited only by lysine,…
Big or small, AOT can do it all! In nature, silica formation occurs at neutral to slightly acidic pH conditions with structural control over multiple length scales. Polyamine-containing emulsions and micelles are thought to play an active role in directing the growth of these structures. To mimic this process, silicic…
This paper presents an overview of the results obtained in recent investigations of the control over the helical pitch under irradiation and the use of these data for the design of compact broadband tunable lasers based on dye-doped cholesteric liquid crystals. It is demonstrated that a reversible change in the lasing…
We report extensive Monte Carlo and event-driven molecular dynamics simulations of the fluid and liquid phase of a primitive model for silica recently introduced by Ford et al. [J. Chem. Phys. 121, 8415 (2004)]. We evaluate the isodiffusivity lines in the temperature-density plane to provide an indication of the shape…
Abstract Summary: Covalent surface functionalization of carbon nanotubes with polypeptides is promising for possible medical applications. This work presents a graft‐from approach to perform the polypeptide modification of multiwalled carbon nanotubes (MWNTs). The raw MWNTs are first amine‐functionalized. The amine‐fu…
The changes in the structure and composition of vapor-deposited ice films irradiated at 20 K with soft x-ray photons (3-900 eV) and their subsequent evolution with temperatures between 20 and 150 K have been investigated by near-edge x-ray absorption fine structure spectroscopy (NEXAFS) at the oxygen K edge. We observ…
We observed that weakly and strongly rubbed polyvinyl-cinnamate surfaces align liquid crystal films perpendicular and parallel to the rubbing direction, respectively. Surface-specific sum-frequency vibrational spectroscopy was used to probe molecular orientations and alignments of the rubbed surfaces and provide a mol…