Materials Literature
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The thermoelectric power and thermoelectric figure of merit for carbon nanostructure consisting of graphite-like (sp(2)) and diamond-like (sp(3)) regions have been investigated. The probability of electron collisions with quasi-ballistic phonons in sp(2) regions has been analysed for the first time. We have shown that…
The IDEAS Guidelines for the assessment of internal doses from monitoring data suggest default measurement uncertainties (i.e. scattering factors, SFs) to be used for different types of monitoring data. However, these default values were mainly based upon expert judgement. In this paper, SF values have been calculated…
Wurtzite (B4) compounds commonly undergo a structural transition to the rocksalt (B1) phase under high pressure. The underlying transition mechanism, or the so-called transition path, has been extensively investigated in recent years. Two different transition paths have been proposed for the B4-B1 phase transition, th…
The alignment behavior of thermotropic smectic A liquid-crystalline molecule 1 and its complexes with lithium triflate on the thin films of rubbed polyimides has been examined. Compound 1 has a rod−coil block structure consisting of a tetra(ethylene oxide) chain that is polar and a phenylcyclohexyl mesogen that is non…
Strengite, FePO 4 ·2H 2 O, commonly occurs in soils and represents a source of P for plants. The solubility of strengite is thus considerably important in the field of agriculture and environmental geochemistry, but few solubility data are available. Using absorption spectrophotometric techniques, the solubility equil…
A unique semibatch crystallization process, coupling with a high-speed rotor-stator device, was developed for generation and control of fine particles. The key underlying mechanism of this process is controlled secondary nucleation under a high shear environment during crystallization, in contrast to the conventional…
A rare micro6-oxo-centered Mn6 mixed-valent cluster (1) is prepared and used as a secondary building unit for the self-assembly of its azido-bridged polymeric analogue (2) in a systematic way with the retention of the Mn6 core of 1. Both complexes are characterized by X-ray single-crystal structure determination. The…
BACKGROUND: Time-resolved immunofluorometric assays (TrIFA) using lanthanide-labeled nanoparticles have greatly increased the sensitivity of immunoassays. Current labeling strategies, however, use either physical doping of lanthanide chelates into preformed nanoparticles or covalent linking of lanthanide chelates to p…
We report a high-yield facile synthesis of uniform single-crystalline γ-CuI nanocrystals with tetrahedral morphology from the reaction between Cu n and KI under ambient conditions. In our method, I - perform the roles of reactant and surface stabilizing agent, thereby reducing the complexity of the reaction by elimina…
Using a domestic microwave oven and new, inexpensive precursors, a rapid and reliable synthesis of highly luminescent CdSe/ZnS NPs was developed. To evaluate the quality of our core/shell particles for varying shell thickness in comparison to that of CdSe/ZnS nanoparticles obtained commercially, the parameter fluoresc…
The quinacridone derivatives N, N ‘ -dialkyl-1,3,8,10-tetramethylquinacridone (C n TMQA, n = 6, 10, 14) were used as building blocks to assemble luminescent nano- and microscale wires. It was demonstrated that C n TMQA with different lengths of alkyl chains display obviously different wire formation properties. C10TMQ…
We present a model of charge transport in organic molecular semiconductors based on the effects of lattice fluctuations on the quantum coherence of the electronic state of the charge carrier. Thermal intermolecular phonons and librations tend to localize pure coherent states and to assist the motion of less coherent o…
The electric conductance of a strip of undoped graphene increases in the presence of a disorder potential, which is smooth on atomic scales. The phenomenon is attributed to impurity-assisted resonant tunneling of massless Dirac fermions. Employing the transfer matrix approach we demonstrate the resonant character of t…
We report on a complete characterization of the optical dispersion properties of conducting thin films of single-wall carbon nanotubes (SWCNTs). The films studied exhibit sheet resistances between 50 and $1000\phantom{\rule{0.3em}{0ex}}\ensuremath{\Omega}∕\mathrm{sq}$ and optical transparencies between 65% and 95% on…
Temporal fluctuations of spectral shapes have been observed in tip-enhanced Raman scattering (TERS) spectra of adenine molecules. The TERS spectra of a nanocrystalline cluster of adenine molecules showed distinct temporal changes including fluctuations of peak frequencies and peak intensities and extraordinary enhance…
Capacitance-voltage (C-V) characteristics are important for understanding fundamental electronic structures and device applications of nanomaterials. The C-V characteristics of graphene nanoribbons (GNRs) are examined using self-consistent atomistic simulations. The results indicate strong dependence of the GNR C-V ch…
Exploitation of the remarkable kinetic inertness and ability of chiral aggregates built with opposite charged porphyrins to self-replicate leads to a system able to cycle between a chiral and an “achiral” state.
We use molecular dynamics simulations to shed light on polymorph selection during the crystallization of the Lennard-Jones fluid. By varying pressure at fixed supercooling, we form large crystallites either of the stable face centered cubic form or of the metastable body centered cubic form and even fine-tune the frac…
The electronic properties of supported gold nanoparticles were determined using X-ray absorption near-edge spectroscopy (XANES) at the gold L III -edge. The whiteline intensity decreased with decreasing particle size, suggesting that smaller particles contained more d electrons. No change in the whiteline intensity, h…
Reactive oxygen species (ROS) play important roles in multiple physiological processes such as cellular signalling and stress responses, whereas, the hydrogen peroxide (H(2)O(2)) scavenging enzyme ascorbate peroxidase (APX) participates in the regulation of intracellular ROS levels. Here, a cotton (Gossypium hirsutum)…