Materials Literature
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Abstract The utilization of fluorescence quenching microscopy (FQM) for quick visualization of chemical functionalization in relatively large regions of graphene, grown via chemical vapor deposition (CVD), is discussed. Through reactive ion plasma etching, patterns of p‐type CVD‐grown graphene functionalized with fluo…
The relaxation dynamics of photoexcited carriers in water-soluble, penicillamine-capped, optically active and luminescent chiral CdSe quantum dots (QDs) were investigated. Three pump–probe techniques, namely broad-band UV–visible transient absorption (TA), picosecond time-resolved infrared (ps-TRIR) transient absorpti…
Abstract Hysteresis is induced in paraelectric (Ba,Sr)TiO 3 (BST) thin‐film capacitors by inserting an Al 2 O 3 barrier layer of a few nanometers in thickness between the BST layer and the electrode. The observed hysteresis is explained by ambipolar charge carrier injection through the Al 2 O 3 layer and charge storag…
Gradient stripe patterns of multiwalled carbon nanotubes (MWCNTs) with remarkable regularity over large areas were fabricated by using evaporation-induced self-assembly technique. In this method, a glass coverslip was inclinedly immersed into a suspension of MWCNTs in dichloroethane. By controlling the solvent evapora…
In this study, the change of the height of the crystallization peak, (δ T ) p , and the reciprocal of the crystallization peak temperature, 1/ T p , were investigated as a function of nucleation heat‐treatment time for two silicate glasses: (2 BaO · TiO 2 ·2 SiO 2 — B 2 TS 2 ) and lithium disilicate ( Li 2 O ·2 SiO 2…
Abstract Increasing ecological concerns have given rise to renewed interest in the use of natural materials, considering their renewability and possibility of disposal at the end of their life cycle without damage to the environment. In this study, we examined the isolation of cellulose from Esparto “ Stipa tenacissim…
The rational design and synthesis of a family of effective low-molecular-weight gelators (LMWGs) with a modular architecture based on a C(2) -1,4-diamide cyclohexane core are reported. Due to the high symmetry, the gelators are initially well distributed in solution and no trapped aggregates are formed before the asse…
Abstract Natural fibers (NFs) are rich in cellulose and also they are a low cost, easily renewable source for polymer composites. However, the presence of impurities (waxes, lignin, etc.) and hydroxyl groups produce those NFs with less ability to reinforce polymeric matrices. Short sisal fibers (SSF) were subjected to…
ABSTRACT The present paper describes some factors exerting an influence on the coaxing effect of austenitic stainless steels. Particularly, the influence of prestrain was investigated in detail. The materials used were austenitic stainless steels, type 304 and 316. Type 304N2 was also used to examine the properties of…
Abstract The design and characterization of amorphous alternating copolymers endowed with a satisfactory thermal stability are reported. These alternating poly(CTFE‐ alt ‐CEVE) copolymers are synthesized by radical copolymerization of chlorotrifluoroethylene (CTFE) with 2‐chloroethyl vinyl ether (CEVE), which are firs…
A low-resolution structure of the catalytic subunit CK2α of human protein kinase CK2 (formerly known as casein kinase 2) in complex with the ATP-competitive inhibitor resorufin is presented. The structure supplements previous human CK2α structures in which the interdomain hinge/helix αD region adopts a closed conforma…
Individual porphyrin macrocycles in fully conjugated oligoporphyrins exhibit different degrees of macrocyclic aromaticity. We proposed a theoretical method for estimating the degrees of macrocyclic aromaticity of these porphyrin units. This method, based on the concept of bond resonance energy, is applicable to all ty…
Geometric frustration gives rise to new fundamental phenomena and is known to yield the formation of exotic states of matter, such as incommensurate crystals, modulated liquid-crystalline phases, and phases stabilized by defects. In this Letter, we present a detailed study of polar structure of freely suspended fluid…
Abstract Nuclear magnetic resonance (NMR) analysis of entire plant cell walls without isolating their components gained importance over the last decade. Recently, a dissolution method and an NMR analysis of entire plant cell walls were reported, in which finely ball-milled lignocellulosic biomass was dissolved at 100°…
Double- and triple-decker oligoarylamines have been prepared and characterized by X-ray crystallography for the first time (see picture; C black, N blue). The N-dianisylaminophenyl-substituted double decker exhibited the multiredox activity, and the oxidized species were confirmed to be in high-spin states on the basi…
Stealth technology in terms of absorption of electromagnetic waves is a most valuable research area for military purposes. Development of radar absorbing materials (RAM) had been actively researched for a quite long time. In the RAM design, weight, thickness, absorptivity, environmental resistance and mechanical stren…
The evolution with thickness of the properties of quench-deposited homogeneous amorphous bismuth (a-Bi) thin films with a 14.67 Å amorphous antimony (a-Sb) underlayer has been studied. In contrast with the results of previous investigations on similar systems the transition between the insulating and superconducting r…
SUMMARY Novel phosphorus‐containing and nitrogen‐containing intumescent flame retardants, bis‐aminobenzyl spirocylic pentaerythritol bisphosphonate (BASPB) and arylene‐ N , N ′‐bis(2,2‐dimethyl‐1,3‐propanediol phosphoramidate) (ABDPP), were synthesized, and their structures were characterized with Fourier transform in…
Endfunktionalisierte Nanostäbe: Mittels Einzelpartikelspektroskopie wird gezeigt, dass die Funktionalisierung von Goldnanostäbchen mit Thiolgruppen zu einer Verbreiterung der Plasmonenresonanz durch chemische Dämpfung führt. Durch spezifische Funktionalisierung der Stäbchenenden (siehe Bild) wird die Verbreiterung nah…
Abstract Mollusc shells are composed of two or three layers. The main layers are well‐studied, but the structural and chemical changes at their boundaries are usually neglected. A microstructural, mineralogical, and biochemical study of the boundary between the inner crossed lamellar and outer prismatic layers of the…