Materials Literature
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Since long and slender carbon nanotubes (CNTs) are usually self-entangled, we propose a factor, length efficiency, in this study to analyze the thermal conductivity of nanocomposites with CNT loading. Theoretical analysis reveals that an appropriate length distribution of CNTs could improve their length efficiency and…
A method for quantifying the nanomechanics of nanomaterials was developed using a nanoprobe manipulator fitted into a transmission electron microscope. Apparent Young’s moduli of various carbon nanotubes (CNTs) were measured using this method. The apparent Young’s modulus of an arc-grown CNT is as large as approximate…
Abstract HgTe nanocrystals are demonstrated to increase the photon‐harvesting efficiency of hybrid solar cells over a broad spectral region between 350 and 1500 nm. Devices combining two solar cell concepts, a solid‐state nanocrystal‐sensitized solar cell and a nanocrystal/polymer‐blend solar cell, are described. Thes…
Water‐in‐oil (w/o) emulsions were prepared with phosphatidylcholine‐depleted lecithin or polyglycerol polyricinoleate (PGPR) as emulsifying agents. The effect of different laboratory emulsification devices and the effect of sodium chloride on particle size distribution, coalescence stability, and water droplet sedimen…
Abstract Summary: A novel non‐aqueous emulsion system, consisting of cyclohexane as the continuous and acetonitrile as the dispersed phase, is described. Stabilization of the system can be achieved by using polyisoprene‐ block ‐poly(methyl methacrylate) copolymers as emulsifiers. The suitability of this system for per…
Preface. 1 Polarized Light. 1.1 Introduction. 1.2 Concept of Light Polarization. 1.3 Description of The State of Polarization. 1.4 The Stokes Concept. 1.5 The Jones Concept. 1.6 Coherence and Polarized Light. References. 2 Electromagnetic Waves in Anisotropic Materials. 2.1 Introduction. 2.2 Analytical Background. 2.3…
Abstract Two stages in the rational redesign of a peptide‐based, self‐assembling fiber (SAF) are described. The SAF system comprises two peptides designed to form an offset α‐helical coiled‐coil heterodimer. The “sticky‐ends” are complementary and promote longitudinal assembly. Alone, the two peptides are unstructured…
Phosphorus-doped ZnO films were grown by molecular-beam epitaxy with a GaP effusion cell as dopant source. Three growth regions were identified to obtain ZnO films with different conduction types. In the oxygen-extremely-rich region, phosphorus-doped ZnO films show n-type conduction with dominant donor-bound excitons…
Optical and dosimetric properties of a new radiophotoluminescent material based on aluminum oxide doped with carbon and magnesium (Al2O3:C,Mg) and having aggregate oxygen vacancy defects are presented. The Al2O3:C,Mg crystals are characterized by several new optical absorption and emission bands. It is suggested that…
A systematic study of electronic transport properties was carried out for ZnO thin films grown on high-temperature annealed buffer layers of semi-insulating Mg0.15Zn0.85O. As functions of growth temperature and oxygen pressure during laser molecular-beam epitaxy growth, there can be seen optimum growth conditions wher…
The properties of ultrathin ruthenium (∼5nm)∕TaN(∼5nm) bilayer as the copper diffusion barrier are studied. Cu, Ru, and TaN thin films are deposited by using the ion beam sputtering technique. The experimental results show that the thermal stability of the Cu∕Ru∕TaN∕Si structure is much more improved than that of the…
The structure of the oxygen-induced p(4 x 4) reconstruction of Ag(111) is determined by a combination of scanning tunneling microscopy, surface x-ray diffraction, core level spectroscopy, and density functional theory. We demonstrate that all previous models of this surface structure are incorrect and propose a new mo…
The dynamic effects, such as the steering and the screening effects during deposition, on an epitaxial growth (Cu/Cu(001)), is studied by kinetic Monte Carlo simulation that incorporates molecular dynamic simulation to rigorously take the interaction of the deposited atom with the substrate atoms into account. We find…
In order to improve the field emission properties of screen-printed carbon nanotube films, ZnO nanostructures were deposited on multiwall carbon nanotubes (MWNTs) using vapor phase transport method. Based on the combined effect of geometrical structure of MWNT/ZnO, a low turn-on field of ∼0.7V∕μm at current density of…
Here we study incoherent transport through molecular wire treated as a linear chain of absorbers, where the phase-breaking processes are modeled by the use of imaginary point-like potentials. The calculations are performed within a transfer-matrix method of the scattering theory. An analytic expression for the transmi…
Using an extensive series of first-principles density functional calculations, we have constructed a ``first-principles aluminum database'' of thermodynamic properties of binary Al-based alloys with 26 different solute elements, $X$. In all cases, first-principles results are critically compared to experimental data f…
Preface. The Editor. Contributors. Dedication. PART I: ESR FUNDAMENTALS. Chapter 1. Continuous-Wave and Pulsed ESR Methods (Gunnar Jeschke and Shulamith Schlick). Chapter 2. Double Resonance ESR Methods (Gunnar Jeschke). Chapter 3. Calculating Slow-Motion ESR Spectra of Spin-Labeled Polymers (Keith A. Earle and David…
It is shown that the ``hysteresis'' in a polaron model of electron transport through the molecule found by M.Galperin et al. [Nano Lett. 5, 125 (2005)] is an artefact of their ``mean-field'' approximation. The reason is trivial: after illegitimate replacement $\hat{n}^{2}=\hat{n}n_{0},$ where \hat{n} is the electron n…
We have explored the influence of different matrices on the emission line shape of individual homogeneously coated CdSe∕CdS∕ZnS nanocrystals. The results obtained corroborate previous observations of a correlation between blinking events and spectral diffusion, but in addition we have found that the extent of spectral…
We investigate the microwave electrodynamic properties of a single superconducting thin film split-ring resonator (SRR). The experiments were performed in an all-Nb waveguide, with Nb wires and Nb SRRs. Transmission data showed a high-Q stopband for a single Nb SRR ($Q \sim 4.5\times10^4$ at 4.2 K) below $T_c$, and no…