Materials Literature
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Abstract A novel type of chitosan nanoscaffold with a soft and cotton‐like appearance is proposed. The key to success is based on two points: (i) the change in morphology of chitin whisker to chitosan nanoscaffold and (ii) the surface modification of the nanoscaffold chitosan with a sugar unit. Simple deacetylation of…
Few transmission electron microscopy (TEM) studies of single crystal diamond have been reported, most likely due to the time and difficulty involved in sample preparation. A method is described for creating a TEM cross section of single crystal diamond using a focused ion beam and in situ lift-out. The method results…
Ein neuartiger Spinpolarisationsmechanismus unter Beteiligung des intramolekularen Ionenpaars *A.−-D.+-R, der mit einem Spin-Bahn-Intersystem-Crossing konkurriert, wird für die Bildung des einzigartig spinpolarisierten photoangeregten Quartettzustands von 1 vorgeschlagen. Verbindung 1 besteht aus einem bodipy-Acceptor…
Abstract The imaging performance of an XPS instrument employing a spherical mirror electron energy analyser has been characterised by measuring the peak position, full width at half maximum (FWHM), and lineshape, at every pixel in the image, for different modes of operation. Changes in these parameters have been ident…
Abstract Composites with different jute fabric contents and polypropylene (PP) were prepared by compression molding. The composite tensile modulus increased as the fiber content increased, although the strain at break decreased due to the restriction imposed on the deformation of the matrix by the rigid fibers. Moreov…
Aqueous solutions of the water-soluble porphyrin 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrinatomanganese(III) acetate were inserted into the holes of a photonic crystal fiber, and the porphyrin absorption bands were identified. Results were obtained for three concentrations. The porphyrins in water show no surface…
Cadmium selenide (CdSe) nanowires, 30−300 nm in diameter, were synthesized using electrochemical step edge decoration on highly oriented pyrolytic graphite (HOPG) surfaces. These CdSe nanowires were more than 100 μm in length and were organized into parallel arrays of hundreds following the length and organization of…
It is generally accepted that protein and solvation dynamics play fundamental roles in the mechanisms of protein-protein binding; however, assessing their contribution meaningfully has not been straightforward. Here, hydrogen/deuterium exchange mass spectrometry (H/D-Ex) was employed to assess the role of dynamics for…
The reaction of tetrakisneopentyl titanium, TiNp 4 ( 1 ), with the surface of partially dehydroxylated Aerosil silica and MCM-41 and the reactivity of the resultant supported titanium alkyl product with water, alcohols, and oxygen are reported. Two methods of preparation have been investigated and compared for the gra…
The lens design problem for the 2006 IODC is to take a cylinder of N-BK7 glass 100 mm long and divide it into two separate lenses, which when shuffled back together like a deck of cards will reform the original glass cylinder. The two lenses must have the same focal length, entrance pupil diameter, and field of view,…
Polysaccharide-stabilized iron complexes are an important class of biomaterials with numerous applications, including iron supplement for treating anemia, contrast agents for magnetic resonance imaging, and magnetic separation of cells and protein. An original procedure for the " in situ " synthesis of ferrites is pro…
Die gehinderte Fällung von In2S3 liefert ultradünne hexagonale Nanoplättchen mit 0.76 nm Dicke und regulierbaren Größen von 22 bis 63 nm. Die TEM-Bilder zeigen 63 nm große Nanoplättchen, die parallel zum Träger orientiert sind (links), eine Seitenansicht der Nanoplättchen (Mitte) und 45 nm große Nanoplättchen, die sic…
The exfoliated (delaminated) structures of lamellar clays offer potential as precursors for the formation of various nanostructured materials. In this article, Lucentite and Laponite phyllosilicate clays, which both have empirical formulas of Na(0.33)[Mg(2.67)Li(0.33)Si4O10(OH)2] but differ in nanodimensions, have bee…
Abstract Polyoxymethylene (POM) is an important plastic with very good properties. However, its poor impact strength limits its applications. Theoretical and experimental studies have confirmed that thermoplastic polyurethane (TPU) can effectively enhance the notched impact strength of POM. This paper reports that the…
Abstract Calcium carbonate/natural rubber (NR) latex nanometer composites were prepared by adding nanometer CaCO 3 whose surface had been treated to natural rubber latex (NRL) before sulfuration. The physical, thermooxidative aging, and thermal degradation properties and the ultra‐microstructure were analyzed with a m…
The magnetic susceptibility and the electrical resistivity of n-type BaTi1-xNbxO3 have been measured over a wide temperature range. It is found that, for 0<x<0.2, dopant electrons form immobile spin-singlet small bipolarons with binding energy around 110 meV. For x=0.2, a maximum in the electrical resistivity around 1…
We review our recent work on quantum-dot devices with carbon nanotubes. We conclude that the single-wall carbon nanotube quantum dot is an artificial atom with two- or four-electron shell structures. Zeeman splitting of single particle levels was observed, which is advantageous for the spin based quantum computing dev…
Although atomic force microscopy (AFM) has emerged as the preeminent experimental tool for real-time in situ measurements of crystal growth processes in solution, relatively little is known about the mass transfer limitations that may impact these measurements. We present a continuum analysis of flow and mass transfer…
Abstract To improve adhesion between fiber and matrix, natural rubber was reinforced with a special type of alkali‐treated grass fiber ( Cyperus Tegetum Rox b ). The cure characteristics and mechanical properties of grass‐fiber‐filled natural rubber composites with different mesh sizes were studied with various fiber…
Aspect ratio of gold nanorods can be controlled by simply adjusting the reaction temperature in the seed-mediated synthesis of the nanorods. The gold nanorods were synthesized by the injection of gold nanoparticle seeds of around 4nm in diameter into a reaction mixture containing hydrogen tetrachloroaurate, hexadecylt…