Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Two-dimensional semiconductors are increasingly relevant for emergent applications and devices, notably for hybrid heterostructures with graphene. We fabricate few-layer, large-area (a few tens of microns across) samples of the III-VI semiconductors GaS, GaSe and InSe using the anodic bonding method and characterize t…
Surface treatment of sansevieria ehrenbergii fibers were carried out using various chemicals like alkali, benzoyl peroxide, benzoyl chloride, permanganate and stearic acid in order to improve the interfacial bonding between the fiber and matrix. Polyester composites were prepared using raw and surface-treated fibers.…
Abstract A planar trioctahedral iron(II)–iron(III) hydroxide (green rust, GR) intercalated with dodecanoate (GRC12) has been oxidized by dioxygen to produce the corresponding planar iron(III) (hydr)oxide. The formulae of GRC12 and the final iron(III) product (oxGRC12) were determined to be FeII2.00FeIII1.00(OH)5.31(C1…
At the onset of radiation exposure, free radicals are formed through ionizing reactions that are then capable of destroying normal tissues. While cells release a level of protective molecules, such as glutathione and metallothionine, they are not capable of blocking all damage, thus resulting in the death of normal ti…
Lead-free tetragonal tungsten bronze Sr5LaTi3Nb7O30 ceramics were prepared and the correlation of the relaxor nature and crystal structure was studied using dielectric spectroscopy and powder X-ray diffraction. Three dielectric relaxations were observed below the deviation temperature TD ∼ 330 K. Relaxation I and II f…
Transformation optics has demonstrated its ability to design various novel devices, for example, to change objects' sizes, positions or even shapes. This time we come to another magical manipulation: to change the numbers of sources. In this paper, we will design a new class of gradient index lenses from multivalued o…
Although desalination of archaeological iron reduces its chloride concentration and enhances object stability, the reduction in corrosion rate that this produces has never been quantified. This study measures post-treatment corrosion rates in accelerated corrosion environments to identify the impact of removing chlori…
Alpha cellulose was extracted from Bambusa rigida fibers by carrying out Soxhlet extraction and bleaching and alkali treatments with acidified sodium chlorite solution and sodium hydrate solution. Then, cellulose nanofibers were isolated from α-cellulose with the combination of (33 wt%) sulfuric acid and ultrasonic tr…
Polydimethylsiloxane-aromatic dianhydride copolymers (PS-Oxy-PAA and PS-DAH-PAA) were blended through several techniques with organoclays Cloisite 30B, 10A and Na+ ranging from 1 to 5 wt.%. Thermal and flame-retardant analysis revealed an in-situ blending approach was optimal, which led to the generation of a nanocomp…
ABSTRACT A series of polyurethane hybrid networks have been synthesized using octakis(m‐isoprenyl‐α,α′‐dimethylbenzylisocyanato dimethylsiloxy) octasilsesquioxane (Q8M8TMI) as a crosslinking agent. The formation of the urethane linkages within the polyurethane hybrids was confirmed by photoacoustic FTIR spectroscopy.…
Nanoparticles, after incubation in biological fluids, adsorb several kinds of biomolecules like lipids, sugars and mainly proteins with high affinities for the nanoparticle surface and with long residence time, forming the so-called hard corona. The biological machinery, such as cellular barriers and membrane receptor…
Author: Attaccalite, Claudio et al.; Genre: Journal Article; Published online: 2013-09-24; Open Access; Title: Efficient Gate-tunable light-emitting device made of defective boron nitride nanotubes: from ultraviolet to the visible
We investigate the transient absorption kinetics due to excitons associated with the first and higher transition states in semiconducting single-walled carbon nanotubes at high excitation densities by means of femtosecond pump–probe spectroscopy. The time evolutions of absorption changes associated with the first, sec…
We have investigated the diameter dependence of the Raman spectra of lead selenide nanocrystals. The first-order Raman peak at about 136 cm${}^{\ensuremath{-}1}$ and its second-order overtone at twice this wavenumber move up in energy with decreasing nanocrystal diameter. This anomalous behavior is interpreted in term…
Polypyrrole (PPy) films were electrodeposited from a pyrrole/sodium salicylate solution in water, through two-dimensional (2-D) polystyrene (PS) templates self-assembled on various oxidizable metals, after which the template was removed by dissolution in tetrahydrofuran (THF). The resulting PPy films were analyzed by…
Functionalized cyclic carbonate monomers were synthesized via a two step route featuring a novel cyclic carbonate intermediate possessing a pendent activated pentafluorophenyl carbonate group (MTC-PFPC). The pentafluorophenyl carbonate of MTC-PFPC was selectively substituted with suitable nucleophiles such as alcohols…
Poly(dimethylsiloxane), PDMS, a versatile elastomer, is the polymer of choice for microfluidic systems. It is inexpensive, relatively easy to pattern, and permeable to oxygen. Unmodified PDMS is highly hydrophobic. It is typically exposed to an oxygen plasma to reduce this hydrophobicity. Unfortunately, the PDMS surfa…
The microstructure and mechanical properties of nanocrystalline Pd films prepared by magnetron sputtering have been investigated as a function of strain. The films were deposited onto polyimide substrates and tested in tensile mode. In order to follow the deformation processes in the material, several samples were str…
Solvothermal reactions of As2O3 and S with CoCl2·6H2O or NiCl2·6H2O in an aqueous solution of dien produced novel thioarsenates [Co(dien)2][Co(As3S3)2] (1) and [Ni(dien)2][Ni(As3S3)2] (2) (dien = diethylenetriamine), and the reaction with CoCl2·6H2O in an aqueous solution of en afforded complex [Hen]2[{Co(en)}6(μ3-S)4…
A series of N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine (TOEEDH4) ligand precursors and their group 4 metal complexes have been prepared. The complexes have been characterized by single-crystal X-ray diffraction and (1)H NMR spectroscopy, highlighting the ability to systematically vary the number of TOEED ligand…