Materials Literature
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The dynamic processes in the surface layers of metals subjected activity of a pulsing laser irradiation, which destroyed not the crystalline structure in details surveyed. The procedure of calculation of a dislocation density generated in bulk of metal during the relaxation processes and at repeated pulse laser action…
The work functions (WF's) of single-walled carbon nanotubes and bundles are studied using first-principles methods. For individual metallic tubes, the WF is independent of the chirality and increase slightly with tube diameter. For semiconducting tubes, the WF (as defined by the HOMO energy) decreases rapidly. The WF…
Single-wall carbon nanohorn (SWNH) aggregates can be produced by CO 2 laser vaporization of carbon, and a single aggregate can take either a “dahlia-like” or “bud-like” form. We found that “dahlia-like” SWNH aggregates were produced with a yield of 95% when Ar at 760 Torr was used as the buffer gas, while “bud-like” S…
The structure, polarization, and zone-center phonons of bulk tetragonal BaTiO$_3$ under compressive epitaxial stress are calculated using density functional theory within the local density approximation. The polarization, computed using the Berry-phase formalism, increases with increasing tetragonality and is found to…
The crystal growth behaviour of solid phase halides encapsulated within single walled carbon nanotubes (SWNTs) is reviewed. As SWNTs form atomically thin channels within a restricted diameter range, their internal van der Waals surfaces regulate the growth behaviour of encapsulated materials in a very precise fashion.…
A microfluidic procedure for the controlled production of cadmium sulfide nanoparticles is described.
Abstract X‐ray photoelectron spectroscopy is used to analyse systematically a group of La 1− x Sr x ‐based mixed‐metal perovskite‐type oxides of interest in the development of oxygen separation membranes. Angle‐ and temperature‐resolved studies reveal compositional variations that correlate with the segregation of var…
Water-soluble, highly fluorescent, silanized semiconductor nanocrystals with different surface charges were synthesized. To covalently attach the nanocrystals to biological macromolecules with a variety of mild coupling chemistries, the outermost siloxane shells were derivatized with thiol, amino, or carboxyl function…
Classical molecular dynamics (MD) simulations employing Brenner potential for intra-nanotube interactions and van der Waals forces for polymer-nanotube interface are used to investigate the thermal expansion and diffusion characteristics of carbon nanotube−polyethylene composites. Additions of carbon nanotubes to a po…
We report a strong correlation between the location of Mn sites in ferromagnetic ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$ measured by combined channeling Rutherford backscattering and by particle-induced x-ray emission experiments and its Curie temperature. The concentrations of free holes determ…
This paper presents the material modeling and experimental characterization of SMA rod and tube actuators undergoing torsional deformations. The investigation of the torsional characteristics of SMAs was carried out in order to gain fundamental understanding of the behavior of torsional actuators for actively altering…
Validity of the assumptions relating the applicability of continuum shell theories to the global mechanical behavior of carbon nanotubes is examined. The present study focuses on providing a basis that can be used to qualitatively assess the appropriateness of continuum-shell models for nanotubes. To address the effec…
This paper presents a detailed calculation of the electronic structure of quantum dots with various geometries. In particular, non-circular quantum dots are examined and their characteristic properties analysed. In addition, the importance of electron-electron spin exchange and correlation is addressed.
Abstract Morphological variations of ABC triblock copolymers through the blending of B or A/C homopolymers, all with short chain lengths, were studied experimentally. The samples were symmetric ISP triblock copolymers, where I, S, and P denote polyisoprene, polystyrene, and poly(2‐vinylpyridine), and component homopol…
Comparative measurements of specific heat capacities (temperature interval between 2 and 500 K), and of low frequency mechanical spectroscopy (temperature interval between 120 and 400 K) in poly(methyl methacrylate) (PMMA) and poly(vinylidene fluoride) (PVDF) amorphous blends show the existence of single calorimetric…
Water has been shown to play a crucial role in the stability and catalytic function of protein. Our purpose is to understand the modification of bulk liquid behavior when water is around myoglobin, in particular, the perturbation of liquid water structure by hydrophobic and hydrophilic sites of the protein. For this,…
The self-consistent-field (SCF) theory developed in Part I [J. Chem. Phys. 116, 7283 (2002), preceding paper] is employed to compute the interaction between particles coated by end-grafted homopolymers in good solvent, where the particles and the homopolymers have comparable sizes. The result shows that, contrary to t…
Residual stress in titanium–nickel thin films has been exploited as a force load for thin-film shape-memory alloy micro-actuators, thus eliminating the need for providing 'external' force load for device training and operation. Thermal cycling during device operation is accomplished using electrical current-induced Jo…
We studied the epitaxy of 10 mol % Nb:SrTiO3 on a SrTiO3(100) substrate under an interrupted pulsed-laser-deposition condition. By monitoring the recovery behaviors of reflection high-energy electron diffraction intensity and an optical reflectance difference signal from the growth surface, we observed that, at temper…
A theory of collective plasma excitations in a linear periodic array of multishell nanotubes is presented. The electron system in the nanotubes is modeled by a quasifree electron gas confined to the surface of an infinitely long cylinder. The plasmon dispersion equation is derived in the random-phase approximation neg…