Materials Literature
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Abstract Intertubular mesopores of imogolite nanotubes were enlarged by using poly(sodium 4-styrenesulfonate) as an expander. The polyanion was bound electrostatically on the positively charged imogolite nanotubes to form an intertwined composite, which provided expanded intertubular mesopores after heat treatment. Th…
pH-dependent dimerization: Zwitterionic polyglycerol dendrons self-assemble into discrete and well-defined dimers in water as shown by dynamic light scattering (DLS), gel permeability chromatography (GPC), and DOSY NMR spectroscopy. However, self-assembly occurs only at neutral pH as either protonation or deprotonatio…
The effect of 1,2,3-benzotriazole (BTA) on the electrochemical behavior of St3 steel in different environments, as well as the adsorption of BTA on the steel surface, is studied using the XPES technique. Based on the XPES data using the MultiQuant program, the thickness of the layers formed on the St3 steel surface ar…
We investigate the internal structure of microbands in a shear-deformed copper single crystal. The microstructure is characterized using high-resolution electron backscatter diffraction. The occurrence of microbands is due to the alternation of local orientation, which is characteristic of a deformation laminate. Thes…
Abstract The InAs quantum structures were formed in silicon by sequential ion implantation and subsequent thermal annealing. Two kinds of crystalline InAs nanostructures were successfully synthesized: nanodots (NDs) and nanopyramids (NPs). The peaks at 215 and 235 cm−1, corresponding to the transverse optical (TO) and…
The stabilization of aqueous foams solely by solid particles is an active field of research. Thanks to controlled particle chemistry and production devices, we are able to generate large volumes of such foams. We previously investigated some of their unique properties, especially the strongly reduced coarsening. Here…
Quantum calculations are used to study the interaction of water molecules with carbonaceous clusters containing one single carbon atom vacancy. This is a simple but realistic way to model the active surfaces found in soot emitted by aircrafts. Prior to water adsorption, the atomic vacancy is oxidised by an approaching…
Energy-dependent free-carrier dynamics was investigated in 70 nm (thin) and 1 µm (thick) ZnO epifilms using the optical pump–probe technique. The far-above-band-gap dynamics in the thin epifilm reveals the prolonged relaxation and the slow recovery of renormalized band gap. The band-gap renormalization (BGR) effect is…
In this study, the effects of exhaust air humidity ratio, the residual moisture content of fabric outlet, and the temperature of the drying air on the exergy destruction and efficiency of stenters were investigated. The exergy efficiencies of the direct gas heated stenter (DGHS) and hot oil heated stenter (HOHS) were…
This paper investigates crystal growth modifiers based on 1,3,5-substituted benzene derivatives. The results show that as expected, the phosphonated derivative inhibits calcite precipitation to a much greater degree than the analogous sulfonate. However, on barium sulfate, both molecules show some crystallization prom…
Abstract In this study, Co doped TlGaS 2 single crystals which belongs to the class of A III B III X 2 VI have been investigated by means of XRD, temperature dependent dark and illuminated conductivity, Space Charge Limited Currents and absorption measurements. The room temperature conductivity and trap concentration…
In this paper we describe the synthesis of functionalised mesoporous organosilicas containing a mannitol derivative in the framework. For this purpose, a bis-silylated precursor 3,4-Di-O-[3-(triethoxysilylpropyl)carbamate]-1,2:5,6-di-O-isopropylidene-D-mannitol was prepared by coupling of 1,2:5,6-di-O-isopropylidene-D…
We have synthesized and characterized a new type of emissive nanocomposite material consisting of a 3D inorganic–organic phosphazene-based polymer and CdSe quantum dots (QDs). The materials uniquely combine and inherit the polymers 3D character and the QD fluorescence properties. Furthermore, we have proven that benzi…
본 총설은 나노셀룰로오스의 원료의 종류, 단리방법과 나노셀룰로오스의 특성 그리고 이를 바탕으로 한 나노복합재의 최근 연구동향을 검토하였다. 나노셀룰로오스를 얻는 원료는 목질자원 및 미생물셀룰로오스 등을 포함하여 다양한 자원이 이용되고 있다. 또 나노셀룰로오스의 단리방법은 물리적, 기계적 및 화학적 방법들이 사용되고 있으며 이들 단리방법에 따라 나노셀룰로오스의 특성은 달랐다. 나노셀룰로오스의 길이와 폭은 사용된 원료 종류와 단리방법에 따라 크게 영향을 받지만 길이는 약 100~300 nm이며 폭은 5~50 nm로 다양하였다. 나노복합재의 제조에는 대부분 수용성 고분자…
Changes in the state of a single spin at a defect in diamond, read out from optical measurements, could be used in quantum sensing and computing.
Abstract Tris[2-{3-(dimesitylboryl)phenyl}pyridinato]iridium(III) ([Ir(Bppy)3]) showed bright green-phosphorescence with the emission lifetime and quantum yield of 1.0–1.4 µs and 1.0, respectively, in nonpolar–polar solvents at 298 K. Detailed spectroscopic experiments and DFT calculations demonstrated that the emissi…
A series of SnO-coated α-Fe solid-solution nanocapsules were fabricated by a modified arc-discharge technique from Fe 1− x Sn x targets with x = 0, 2, 3, 4 and 5 at%. The core and shells change with changing Sn concentration (0, 2, 3, 4 and 5 at%) in the Fe 1− x Sn x targets used in the preparation. An in-depth study…
Abstract In this study, we found that amylose–poly(tetrahydrofuran) (PTHF) inclusion complexes were formed when a mixture of amylose with PTHF was stirred in 1-butyl-3-methylimidazolium chloride of an ionic liquid at high temperature under reduced pressure, followed by cooling and precipitation by addition of methanol.
„Mauer“-Mikrostrukturen von künstlichen Chitosan-Montmorillonit(MTM)-Bionanokompositfilmen lassen sich leicht aus Chitosan-MTM-Hybridnanoblättern herstellen (siehe Bild). Die feuerhemmenden Perlmutt-artigen Filme verfügen über eine höhere mechanische Leistungsfähigkeit (Young-Modul: 10 GPa, Zugfestigkeit: 100 MPa) als…
Graphene nanoribbons (GNRs) have many applications in electronics due to their exceptional mechanical, electronic and thermal properties. In order to utilize GNRs for stretchable electronics, it is an important issue to enhance the stretchability of GNRs. In this work, we report that the stretchability of GNRs can be…