Materials Literature
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We briefly review the status of the application of carbon nanotubes (CNTs) for future interconnects and present results concerning possible integration schemes. Growth of single nanotubes at lithographically defined locations (vias) has been achieved which is a prerequisite for the use of CNTs as future interconnects.…
We show that the bulk Dresselhauss ($k^3$) spin-orbit coupling term leads to an intrinsic spin-Hall effect in n-doped bulk GaAs, but without the appearance of uniform magnetization. The spin-Hall effect in strained and unstrained bulk GaAs has been recently observed experimentally by Kato {\emph{et. al.}} \cite{kato20…
Joint influence of two effects, namely, nonequilibrium spin injection by current, and current induced surface torque, on spin-valve type ferromagnetic metallic junctions is considered theoretically. The CPP configuration is assumed. The consideration is based on solving a coupled set of equations of motion for the mob…
The configurational states as introduced by Goldstein represent the system's basins and are characterized by their free energies $φ(T,V)$ as we show here. We find that the energies of some of the special points (termed basin identifiers here) like the basin minima, maxima, lowest energy barriers, etc. cannot be used t…
Atomistic density functional theory (DFT) calculations of the capacitance between a metallic cylindric gate and a carbon nanotube (CNT) are reported. Results stressing the predominant effect of quantum capacitance in limiting or even enhancing screening properties of the CNT are shown. Other contributions to the quant…
Metamaterials are new artificial materials with unusual electromagnetic properties that are not found in naturally occurring materials. All "natural" materials such as glass, diamond and such have positive electrical permittivity, magnetic permeability and an index of refraction. In these new artificially fabricated m…
Abstract A sonochemical method has been successfully used in order to incorporate MnO 2 nanoparticles inside the pore channels of CMK‐3 ordered mesoporous carbon. Modification of the intrachannel surfaces of CMK‐3 to make them hydrophilic enables KMnO 4 to readily penetrate the pore channels. At the same time, the mod…
We determined the three-dimensional crystal structure of the protein YML079wp, encoded by a hypothetical open reading frame from Saccharomyces cerevisiae to a resolution of 1.75 A. The protein has no close homologs and its molecular and cellular functions are unknown. The structure of the protein is a jelly-roll fold…
Phonon-induced spin relaxation rates in quantum dots are studied as function of in-plane and perpendicular magnetic fields, temperature and electric field, for different dot sizes. We consider Rashba and Dresselhaus spin-orbit mixing in diferent materials, and show how Zeeman sublevels can relax via piezoelectric and…
Vibration properties of Zn(1-x)Be(x)Se, a mixed II-VI semiconductor haracterized by a high contrast in elastic properties of its pure constituents, ZnSe and BeSe, are simulated by first-principles calculations of electronic structure, lattice relaxation and frozen phonons. The calculations within the local density app…
Ion beam implantation is attractive since it allows us to create very well-defined supersaturated concentration depth profiles in the near surface region. In this paper, thin layers of heterogeneous colloidal compound semiconductor nanocrystals will be discussed. We will focus on the synthesis of dense packed thin bur…
Abstract A new approach has been proposed and was shown to be a feasible method to produce nanosized polymer crystals of poly(acrylic acid). The new approach involves in situ polymerization of acrylic acid in the interlayers of a layered double hydroxides (LDHs) followed by exchange of the polymer anion for carbonate.…
We have demonstrated high-throughput synthesis and screening of a thin film photocatalyst library. Pulsed laser deposition enables us to grow the thin film photocatalyst epitaxially with atomically flat terraces and steps. A binary composition spread of [(SrTiO 3 ) 1− x (LaAlO 3 ) x ] (0 < x < 1) was fabricated by a c…
Abstract Colloidal dispersions of hybrid nanocomposite composed of gold nanoparticles (Au-NPs) and polypyrrole (PPy) were prepared by a sonochemical method, in which gold ion and pyrrole monomer in an aqueous solution were reduced and oxidized, respectively, by ultrasonic irradiation in the presence of poly(N-vinyl-2-…
The introduction of niobium into the FDU-1 structure has been studied. The evolution of the NbFDU-1 pore structure was deliberated using nitrogen adsorption at 77 K and X-ray diffraction. The influence of the niobium source on the structural properties and the incorporation of niobium species into the walls of FDU-1 m…
Abstract Combined a surface modification scheme with a neutralization reaction, accompanied with reduction procedure, highly dispersed gold nanowires within the pore channels of mesoporous silica thin films were prepared from organic–inorganic hybrid films modified with basic moieties.
In this work the first experimental observation of a peculiar behavior in the isotropic phase of liquid crystals by means of 2H NMR is reported. In particular, two five-ring banana-shaped mesogens, the 1,3-phenylenebis{4,4'-(11-undecenyloxy)benzoyloxy}benzoate (Pbis11BB) and its 4-chloro homologue (ClPbis11BB), select…
Wavelength-resolved femtosecond transient absorption spectroscopy is used to follow the electronic dynamics of single-walled carbon nanotubes in polymers following visible photoexcitation. Electron-hole (e-h) pairs give rise to sharp features in the transient spectra that decay in amplitude and exhibit rapid spectral…
Abstract Precise and uniform metallization of double-stranded DNA by the selective electroless plating method was investigated for the fabrication of nanowires. Cis-platin was bound to template DNA molecules and reduced to platinum which then catalyzed silver metal deposition. The DNA molecules combined with the plati…
[Structure: see text] Spiroconjugated TTF-type electron donors (13a-c) and TCNQ-type electron acceptors (10, 11) have been prepared from spiroquinone 9. Cyclic voltammetry reveals a relatively weak accepting ability for 10 and 11, and a strong electron-donor character for 13a-c. Whereas the spiroconjugation introduces…