Materials Literature
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Multilayers film of nanostructured citrate-stabilized gold particles (AuNPs) has been fabricated based on the layer-by-layer (LBL) technique using a self-assembled monolayer of 1,4-benzenedimethanethiol (BDMT). The formation of AuNPs and BDMT self-assemblies as alternative multilayers was confirmed by transmission ele…
This work shows that a linearly polarized Ar+ laser single-beam irradiation can cause stretching deformation of azo polymer colloidal spheres along the polarization direction of the laser beam. An epoxy-based polymer, containing 4-amino-4'-carboxyazobenzene at each repeat unit, was used to construct the colloidal sphe…
Semiconductor quantum dots (QDs) are a new generation of inorganic probes with advantageous properties over traditional organic-only probes for biological applications. A major hurdle in the use of QDs for biology is the inability of the hydrophobically synthesized QDs to interface with aqueous environments. There hav…
Chemical and physical synthesis routes were combined to prepare macroporous CaCu(3)Ti(4)O(12) thin films by pulsed laser deposition onto poly(methyl methacrylate) (PMMA) microsphere templated substrates. These films showed remarkably enhanced gas sensitivity compared with control films deposited on untreated substrate…
To efficiently reinforce polymer matrix composites with carbon nanotubes, issues of dispersion and nanotube−matrix compatibility should be optimized. Sidewall chemical functionalization was shown to be effective in improving both the dispersion and interaction between the nanotube and the matrix. This work evaluates t…
Density functional perturbation theory calculations of alpha-quartz using extended norm conserving pseudopotentials have been used to study the elastic properties and phonon dispersion relations along various high symmetry directions as a function of bulk, uniaxial and non-hydrostatic pressure. The computed equation o…
The preparation and characterization of blends of polyesters and excimer-forming, photoluminescent 1,4-bis-(α-cyano-styryl)-benzenes, which function as built-in deformation or threshold temperature sensors, are described. Binary blends of poly(ethylene terephthalate) (PET) or poly(ethylene terephthalate glycol) (PETG)…
Au-Pt heteroaggregate nanostructures were prepared by sequential reduction methods. The structures have approximately 11 nm Au cores with Pt "tendrils" attached to the Au surface. The heteroaggregates are active H2 oxidation catalysts and show high activity at 90 degrees C in the presence of 1000 ppm CO. The surprisin…
We present density functional theory calculations and first-principles molecular dynamics simulations of formic acid adsorption on anatase TiO(2)(001), the minority surface exposed by anatase TiO(2) nanoparticles. A wide range of factors that may affect formic acid adsorption, such as coverage, surface hydration, and…
We report on the fabrication and characterization of bulk micromachined pressure sensors based on individual single-walled carbon nanotubes (SWNTs) as the active electromechanical transducer elements. The electromechanical sensor device consists of an individual electrically connected SWNT adsorbed on top of a 100-nm-…
By considering risk in the early stages of a technology, costs of identifying important health and environmental impacts after a technology has widely diffused can be avoided. Nanotechnology, involving materials and objects less than 100 nm in size, is an important case in point. In this paper we analyze the research…
Due to strong electric fields at the surface, the absorption and scattering of electromagnetic radiation by noble metal nanoparticles are strongly enhanced. These unique properties provide the potential of designing novel optically active reagents for simultaneous molecular imaging and photothermal cancer therapy. It…
Nanostructured materials have attracted a great attention because of their novel size-and shape-dependent electronic, magnetic, optical, and catalytic properties that differ drastically from those ofbulk materials?Metals of nanosize,
The photochromic diarylethene, 1, 2-bis(2-methyl-5-(3-trifluorophenyl)-3-thienyl)perfluorocyclopentene (BMTTP), was synthesized. This compound undergoes a photochromic reaction either in solution, PMMA amorphous film or in the single crystalline phase. Using this compound as recording medium, two-photon optical bit pa…
Molecular dynamics simulations were performed to study the effect of the composition of the intergranular film (IGF) on anisotropic and isotropic grain growth in alpha-Al2O3. In the simulations, the IGF is formed while in contact with two differently oriented alumina crystals, with the alumina (0001) basal plane on on…
Shape controlled synthesis of inorganic nanocrystals is one of the important issues in materials chemistry due to their novel shape dependent properties. Although various shapes of nanocrystals have been developed, a systematic account on the shape control of these nanocrystals still remains an important subject in ma…
The formation of clusters with crystal-like order in two dimensions is studied using Monte Carlo simulations. We find that the necessary conditions to induce the formation of clusters of one component is to add a second component that has a larger size and that has a long-range soft repulsive interaction with its own…
The influence of different factors on the overall mass transfer coefficient of liquid−liquid extraction was investigated, employing single-drop experiments with mass transfer in either direction. The chemical system of toluene−acetone−water was used with the advantage of high accuracy and repeatability when using gas…
Magnetoimpedance (MI) and hysteresis loops were studied in electroplated Ni79.1Fe20.9/Cu, Ni75.64Fe24.26Ru0.10/Cu, Ni79.51Fe20.31Ru0.18/Cu and Ni75.99Fe23.66Ru0.34/Cu wires. Scanning electron micrographs showed that crack-free electroplated wires were obtained with a smooth surface. The average grain size varied betwe…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Krishnan Chari, Charles M. Rankin, David M. Johnson, Thomas N. Blanton, Robert G. Capurso; Single…