Materials Literature
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10 mol % of bismuth oxide was designed to add in making novel Ho3+ doped heavy metal tellurite glasses (LKBBT) with large refractive indices and glass densities. Based on optical absorption, Judd-Ofelt parameters Ω2, Ω4, and Ω6 have been derived to be 4.373×10−20, 1.906×10−20, and 1.451×10−20cm2, respectively, which i…
This paper presents a review of the literature that deals with carbon nanotubes (CNTs) and liquid crystals (LCs) focusing on two main aspects. First, we describe the liquid crystalline behaviour of carbon nanotubes in solution. Via functionalization or absorption of amphiphilic molecules, CNTs can form nematic phases…
Silicon-rich silicon oxide films deposited by plasma enhanced chemical vapor deposition with different total Si contents (from 39to46at.%) have been annealed at increasing temperature (up to 1250°C) in order to study the Si nanocrystal (Si-nc) nucleation as well as the structural changes induced in the amorphous embed…
Single wall carbon nanotubes (SWCNT) have become a strategic material in the area of nanotechnologies nowadays, and catalytic chemical vapor deposition seems to be the most promising technique in view of an industrial‐scale production. However, the selective catalytic production of single wall carbon nanotubes is stil…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTAntagonistic Triblock Polymer Gels Powered by pH OscillationsPaul D. Topham, Jonathan R. Howse, Colin J. Crook, Steven P. Armes, Richard A. L. Jones, and Anthony J. RyanView Author Information Department of Chemistry, University of…
The surface area of the SBA-15 type ordered mesoporous silica has been enlarged by employing a novel method of synthesis. The procedure is based on the employment of phosphoric acid during synthesis. These materials present surface areas more than twice larger than those of conventional SBA-15.
Ta-doped Ti1−xTaxCoSb (0⩽x⩽0.08) half-Heusler compounds were synthesized by melting and annealing process. Their thermoelectric properties were studied in the temperature range of 300–900K. The Ti1−xTaxCoSb compounds exhibit negative Seebeck coefficients with considerably large absolute values. With increasing Ta subs…
The relationship between friction and the tactile properties of woven and knitted fabrics was investigated. Coefficients of friction for the fabrics were measured using two devices: a previously developed Textile Friction Analyzer and the Kawabata Evaluation System FB4. The tactile properties of the fabrics were evalu…
A novel periodic structure, made of an arbitrary number of stacked subwavelength hole arrays, exhibiting simultaneously electromagnetic band gap, extraordinary transmission and a longitudinal left handed propagation is presented in this paper. If the longitudinal period of the stacked structure is chosen adequately, i…
Nanofiber technology (fiber diameter less than 1 micrometer) is under development for future Army lightweight protective clothing systems. Nanofiber applications for ballistic and chemical/biological protection are being actively investigated, but the thermal properties of nanofibers and their potential protection aga…
AIMS: The aim of this article is to present a novel synthetic route to form CeO(2) nanoparticles that protects against the detrimental influence of oxidative stress in mammalian cells. METHODS: The noncytotoxic surfactant lecithin was used to synthesize CeO(2) nanoparticles and the products were colloidally stabilized…
A theoretical procedure is developed for evaluating the conversion efficiency of a thermoelectric system that uses combusted heat as its thermal input. The effect of heat recirculation on the conversion efficiency of the thermoelectric combustion system is investigated based on five typical configurations. The calcula…
CdSe nanorods were found to assemble at an oil–water interface (on the surface of water droplets) as shown by small-angle neutron scattering. When nanorod-covered droplets were dried on a substrate, the decrease in interfacial area produced an in-plane compression, leading to various two-dimensional packing motifs for…
Abstract The effects of chitosan on mycelial growth and spore germination of Colletotrichum gloeosporioides were investigated on potato dextrose agar (PDA) containing 0%, 0.5%, 1.0%, 1.5%, and 2.0% (w/v) chitosan dissolved in 0.5% acetic acid. Complete inhibition of mycelial growth and spore germination was observed i…
Nanotechnology is the creation of functional materials, devices and systems through control of matter on the nanometer length scale, and exploitation of novel phenomena and properties (physical, chemical, biological, mechanical, electrical...) at that length scale. In the area of cosmetics and anti-aging, in particula…
Cavitation cluster dynamics after the passage of a single pressure wave is studied for different concentrations of artificial cavitation nuclei (30 to 3x10(5) nuclei/ml). With increasing concentration of cavitation nuclei the lifetime of the cavitation cluster is prolonged. Additionally, it is found that the spatial e…
In this paper we report on the synthesis of a composition, Ti3Al(C0.5,N0.5)2, belonging to the Mn+1AXn family of ternary layered carbides and nitrides. X-ray and selected area diffraction confirm that this compound is isostructural with Ti3SiC2; its a and c-lattice parameters are 3.0404(5) and 18.414(6) Å, respectivel…
Abstract Fougerite (IMA 2003-057) is a mixed M (II)- M (III) hydroxysalt of the green rust group, where M (II) can be Fe or Mg, and M (III) is Fe. The general structural formula is: <mml:math xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:mnf="http://cambridge.org/core/manifest" xmlns:cup="http://contentservices.cam…
This work is concerned with Bi2Te3-based compounds known as being highly effective materials for thermoelectric applications near room temperature. These compounds are characterized by a remarkable anisotropy linked to their R3¯m crystal structure. Two textured p-type Bi0.4Sb1.6Te3 samples were prepared using a powder…
Atomic positions in geological aragonite and biogenic aragonite, obtained from several mollusk shells, were precisely measured by high-resolution neutron diffraction, which is more sensitive than X-ray diffraction to the positions of light atoms, C and O, in the CaCO 3 structure. Comparable analysis of atomic position…