Materials Literature
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Ag-tetracyanoquinodimethane (Ag-TCNQ) nanostructures are synthesized using both solution reaction in acetonitrile and a novel vacuum-saturated vapor reaction method. Experiments show that the latter synthesis method produces Ag-TCNQ nanowires with better uniformity and higher aspect ratio. These nanowires, having diam…
[reaction: see text] A series of aliphatic internally branched poly(amido amine) dendrons and dendrimers has been synthesized. The internal branching unit was 1,2-propanediamine and a series of PAMAM-type dendrons of the types AB2, AB4, and AB8 were built. These were anchored on a core molecule containing four carboxy…
We report a novel electric-field-enhanced chemical assembly approach for fabricating highly aligned SWNT arrays on a solid surface with remarkably improved efficiency and packing density, which is very important for the real applications of carbon nanotube arrays. With the enhancement of the electric field, the assemb…
Completely revised and expanded, this Second Edition thoroughly examines the wide array of new and emerging cosmeceutical compounds from antiaging, skin care and repair, moisturizing, and protective compounds to agents with antimicrobial and antiirritant properties.
A 5-inch diagonal parallel-gated backlight unit for a liquid crystal display (LCD) was fabricated using carbon nanotube (CNT) paste. A brightness of 10,000 cd/m 2 was demonstrated at 10 KV of anode voltage, and 31 lm/W of light efficiency (for P-22 white phosphor) was obtained. We inserted a mesh electrode with approp…
A novel approach for the surface modification of poly(acrylonitrile-co-2-hydroxyethyl methacrylate) (PANCHEMA) membranes by introducing phospholipid moieties is presented, which involved the reaction of the hydroxyl groups on the membrane surface with 2-chloro-2-oxo-1,3,2-dioxaphospholane (COP) followed by the ring-op…
Microfabricated field emitters have shown the potential for very high current densities (>100A∕cm2) and total emission currents (>1A). However, realizing this potential has been elusive, primarily because these cathodes exhibit insufficient emission uniformity over an emitter array. In this article we re…
Abstract Single‐walled carbon nanotubes have considerable potential as building blocks in future nanoscale electronics. The tubes exist in two modifications, metallic and semiconducting, which might be used in a range of electronic applications. One of the grand challenges is to separate metallic from semiconducting t…
We review various properties of chalcogenide glasses that make them promising materials for passive and active microphotonics. We then describe two processes for channel waveguide fabrication, using the chalcogenide glass As/sub 2/Se/sub 3/ as a core material and compatible polymers as claddings. In the first approach…
A very high yield, selective growth of dense, vertically aligned single-walled carbon nanotubes (SWNTs) has been demonstrated for the first time on Si substrates with a sandwich-like coating structure of Al2O3/Fe/Al2O3 at a low (600 °C) temperature by point-arc microwave plasma CVD. The SWNT film thickness increases c…
Adaptations of proteins towards an increased thermostability can be observed in nature in environments such as the marine hydrothermal vents. The principles behind an increased thermostability can then be used in the biotech industry in order to design proteins with high stability. The demand for an increased stabilit…
Abstract To precisely identify the effect of molecular weight of atactic poly(vinyl alcohol) ( a ‐PVA) on the durability and polarizing efficiency (PE) of a ‐PVA/dye polarizing film, we prepared two ( a ‐PVA)s with similar syndiotactic diad contents of 54.0%, degrees of saponification of 99.9%, and with different numb…
This work demonstrates a sustainability assessment of stabilisers for use in PVC pipes. The two key stabilisers selected compare calcium–zinc and so-called organically based stabiliser systems (OBS by Crompton). The methodology of the work is based on a robust set of sustainability principles known as The Natural Step…
Abstract A very efficient, simple synthesis of face‐to‐face porphyrin–corrole free‐bases bearing substituents at the meso positions of the corrole ring is reported. Starting from the (porphyrin–aldehyde)zinc species 1Zn , porphyrin–corrole free‐bases ( 3M , 3C ) are obtained in two steps, in fairly good yields (40–43…
Neste trabalho, foi analisado o efeito de um tratamento químico, ou seja, de acetilação de grupos, sobre a estrutura e a morfologia superficial de fibras de bucha (Luffa cylindrica) por meio de FTIR e microscopia eletrônica de varredura. Esse tratamento foi realizado tendo por objetivo aumentar a compatibilidade da bu…
In this study boron nitride‐containing composites (BNCC) with high strength, low Young's modulus and highly improved strain tolerance have been developed by reaction synthesis technology. The in situ formed BN particles with fine (nanosized) particle size were distributed homogeneously and isotropically in the matrixe…
Research Article| March 01, 2005 Growing Diamond Crystals by Chemical Vapor Deposition Russell J. Hemley; Russell J. Hemley Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, N.W., Washington, D.C. 20015, USA E-mail: r.hemley@gl.ciw.edu Search for other works by this author on: GSW Goo…
Composite materials are a class of materials used in many diverse applications. Very recently the attention has shifted to the development of green composites that are easily recycleable and in this case the use of biodegradable matrices and fibres appear to be highly attractive. In the present study a class of biodeg…
We have investigated the electronic structure of Au(tmdt) 2 (tmdt = trimethylenetetrathiafulvalenedithiolate), which is a single-component conductor showing a magnetic phase transition around 100 K, by ab initio plane-wave pseudopotential calculations. A single band crosses the Fermi level. This band and the next band…
Research Article| March 01, 2005 Meteoritic Nanodiamonds: Messengers from the Stars Gary R. Huss Gary R. Huss 1Hawai'i Institute of Geophysics and Planetology University of Hawai'i at Manoa, USA E-mail: ghuss@high.hawaii.edu Search for other works by this author on: GSW Google Scholar Elements (2005) 1 (2): 97–100. ht…