Materials Literature
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Well-controlled polymerization of N-vinylpyrrolidone (NVP) on Au surfaces by surface-initiated atom transfer radical polymerization (SI-ATRP) was carried out at room temperature by a silanization method. Initial attempts to graft poly(N-vinylpyrrolidone) (PVP) layers from initiators attached to alkanethiol monolayers…
The enhanced photocurrent responses and dramatic antiphotocorrosion performance of CdS hybrid were obtained by formation of triple heterojunction (TH), i.e., n-CdS/n-TiO 2 /p-BDD:n-TiO 2 cube tubes were vertically grown on p-type boron-doped diamond (BDD) film. Then n-CdS nanoparticles (NPs) were randomly assembled on…
We investigated viscoelastic and photoresponsive properties of the microparticle/liquid-crystal (LC) composite gels. The mechanical strength of the colloidal gels can be widely tuned by varying particle concentrations. With increasing particle concentration, a storage modulus of the particle/LC composite gels increase…
Einfach mal blau machen: Die Photolumineszenz in Suspensionen von Graphenoxid (GO) lässt sich von roter zu blauer Emission durchstimmen (siehe Bild), indem man die Anteile von sp2- und sp3-C-Atomen durch Reduktion der Oxidgruppen auf der Oberfläche schrittweise verändert. Eine Elektron-Loch-Rekombination aus zwei Type…
Abstract Flammability of Mg–X alloys was studied for X = Al, Ca, Si, Sn, Sr, La, Mn, Zn, Zr, Ce, Gd, and Nd. One end of a horizontal cylindrical specimen was subjected to a free diffusion liquid petroleum gas (LPG) flame. There was no burning without some melting of the specimen tip. Mg5%Gd, Mg3%Ca, and Mg5%Ca had con…
Scatterometry is frequently used as a non-imaging indirect optical method to reconstruct the critical dimensions (CD) of periodic nanostructures. A particular promising direction is EUV scatterometry with wavelengths in the range of 13 - 14 nm. The conventional approach to determine CDs is the minimization of a least…
The objective of this work was to compare the flame retardancy of intumescent flame retardant ethylene–vinyl acetate (EVA/IFR) composites containing different metal oxides including lanthanide oxide, iron oxide, the mixture of iron oxide and lanthanide oxide, and lanthanum ferrite nanocrystalline (LaFeO 3 ). A novel c…
π-Extended TCBD-porphyrins that contained a 1,1,4,4-tetracyanobuta-1,3-diene unit were prepared by a highly efficient [2+2] cycloaddition of tetracyanoethene (TCNE) or 7,7,8,8-tetracyano-p-quinodimethane (TCNQ) with meso-substituted trans-A(2)B(2)-porphyrins that contained two phenylethynyl groups, followed by a retro…
In order to unravel the magnetism of Co-doped ZnO films, we have performed rigorous experiments on Co-doped ZnO grown on O-polar ZnO (000$\overline{1}$) substrates by molecular beam epitaxy. We find that the ZnO:Co with Co composition less than 20$%$ is paramagnetic even at low temperatures, whereas that with Co compo…
Abstract This article focuses on the synthesis and characterization of polyhydroxyurethanes (PHUs) obtained from the reaction between bis[(2‐oxo‐1,3‐dioxolan‐4‐yl)methyl]benzene‐1,4‐dicarboxylate (DCter) and various diamines (aliphatic, cycloaliphatic and oligomeric) or polyamines (diethylenetriamine (DETA) and diethy…
Abstract As a new class of magnetically driven active materials, magnetic shape memory (MSM) alloys show large strains of up to 10% in Ni 2 MnGa single crystal with a modulated martensitic structure. The magnetic field induced twin boundary motion can be exploited for actuators, sensors, and as it is an energy dissipa…
Single-walled carbon nanotubes (SWCNTs) have attractive electrical and physical properties, which make them very promising for use in various applications. For some applications however, in particular those involving electronics, SWCNTs need to be synthesized with a high degree of control with respect to yield, length…
In this research, impregnated oil palm trunks (OPT) and polymer composites were prepared from a combination of dried oil palm trunks with phenol formaldehyde (PF) and urea formaldehyde (UF) resin in different resin percentages using an impregnation method. Time of impregnation was a parameter used to control the perce…
Abstract A functional surfactant designed to solubilize and individualize nanotubes efficiently in aqueous media and to form energy transfer complexes with the carbon nanotubes through π – π stacking is presented. Upon excitation of the adsorbed perylene unit an emission from the nanotubes is observed that indicates a…
This article studied the dripping behavior of eight polymers under UL94 vertical test conditions. The results suggested two different dripping behaviors: Type I, dripping with uniform- and small-sized drops with the short first dripping time, and Type II, dripping with irregular- and large-sized drops with the long fi…
Many materials have been fabricated using electrospinning, including pharmaceutical formulations, superhydrophobic surfaces, catalysis supports, filters, and tissue engineering scaffolds. Often these materials can benefit from microparticles included within the electrospun fibers. In this work, we evaluate a high-thro…
Chitosan (CS), the deacetylated form of chitin, the second most abundant, natural polysaccharide, is attractive for applications in the biomedical field because of its biocompatibility and resorption rates, which are higher than chitin. Crosslinking improves chemical and mechanical stability of CS. Here, we report the…
Charge ordering in the (TMTTF)2X salts with centrosymmetric anions (X = PF‾6 , AsF‾6 , SbF‾6 ) leads to a ferroelectric state around 100 K. For the first time and in great completeness, the intra- and intermolecular vibrational modes of (TMTTF)2X have been investigated by infrared and Raman spectroscopy as a function…
Transformation elasticity, by analogy with transformation acoustics and optics, converts material domains without altering wave properties, thereby enabling cloaking and related effects. By noting the similarity between transformation elasticity and the theory of incremental motion superimposed on finite pre-strain, i…
Codoping with Li + has become a common method for improving optical efficiency in oxide-based upconversion luminescent materials, yet the mechanisms of enhancement have remained ambiguous. Herein, we delineate the major ways by which Li + enhances visible-to-ultraviolet upconversion in the phosphor Y 2 SiO 5:Pr 3+ and…