Materials Literature
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Abstract Ultra‐thin films of subphthalocyanine (SubPc) were grown onto Si/SiO 2 substrates by organic molecular beam deposition and the complex refractive index has been characterized by spectroscopic ellipsometry. The peak maximum in the extinction coefficient is determined to be 1.6 at 590 nm and the dielectric cons…
Tyrosine hydroxylase, a member of the aromatic amino acid hydroxylase family, uses a mononuclear Fe(II) and tetrahydropterin for hydroxylation of tyrosine to dihydroxyphenylalanine. Rapid-freeze quench Mössbauer spectroscopy has now provided direct evidence for the presence of an Fe(IV) intermediate in the reaction ca…
The Hugoniot curves for shock-compressed molybdenum with initial porosities of 1.0, 1.26, 1.83, and 2.31 are theoretically investigated. The method of calculations combines the first-principles treatment for zero- and finite-temperature electronic contribution and the mean-field-potential approach for the ion-thermal…
We investigate the interaction of a periodic solution and one-soliton solution for the spin-polarized current in a uniaxial ferromagnetic nanowire. The amplitude and wave number of the periodic solution for the spin current have the different contribution to the width, velocity, and the amplitude of soliton solution,…
Solution-grown single crystals of Fe(2)OBO(3) were characterized by specific heat, Mössbauer spectroscopy, and x-ray diffraction. A peak in the specific heat at 340 K indicates the onset of charge order. Evidence for a doubling of the unit cell at low temperature is presented. Combining structural refinement of diffra…
We present a first-principles investigation of the phonon-induced electron self-energy in graphene. The energy dependence of the self-energy reflects the peculiar linear band structure of graphene and deviates substantially from the usual metallic behavior. The effective band velocity of the Dirac fermions is found to…
We present a general theory of effective media to set up the relationship between the particle responses and the macroscopic system behaviors for artificial metamaterials composed of periodic resonant structures. By treating the unit cell of the periodic structure as a particle, we define the average permittivity and…
Silver grids are utilized to exclude the expensive use of indium tin oxide (ITO) in conjugated polymer photovoltaic devices. The grids are generated by electroless deposition from elastomeric microfluidic channels onto transparent substrates. The organic photovoltaic devices demonstrated here, with minimized series re…
Abstract In this Full Paper, a water/alcohol/oleic acid system was developed to prepare NaYF 4 nanocrystals with predictable size, shape and phase. The structural and kinetic factors that govern the phase and shape evolution of NaYF 4 nanocrystals have been carefully studied, and the influence of NaF to Y 3+ ratio, re…
The present work aims to test the validity of the electronic shell model for Au 25 (SC 6 H 13 ) 18 by monitoring the charge state of the Au:S core and thereby to elucidate the origin of magic stability. Electrospray ionization mass spectrometry revealed that the Schiffrin method yields [Au 25 (SC 6 H 13 ) 18 ] x with…
The distribution of phonons that carry heat in crystals has typically been studied through measurements of the thermal conductivity $\ensuremath{\Lambda}$ as a function of temperature or sample size. We find that $\ensuremath{\Lambda}$ of semiconductor alloys also depends on the frequency of the oscillating temperatur…
This paper presents an in-depth study of Surface Enhanced Raman Scattering (SERS) enhancement factors (EFs) and cross-sections, including several issues often overlooked. In particular, various possible rigorous definitions of the SERS EFs are introduced and discussed in the context of SERS applications, such as analy…
The online partial discharge (PD) diagnosis has been recently accepted as an effective technique for the evaluation of the insulation condition of stator windings in high-voltage rotating machines. There are several types of sensors used for detecting PD in rotating machines. The so-called capacitive coupler, which is…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A considerable number of nonlinear industrial loads employ three-phase inductive filters to reduce their peak currents and mitigate the conduction of harmonic currents into the supply system. In modeling and analysis of this kind of filter, the fact that-for reasons of economy-they consist of a single block where the…
Carbon nanotube sensors are modeled and their design space analyzed. It is found that semiconducting nanotubes are almost always preferred over metallic nanotubes, intrinsic nanotubes maximize sensor performance, while minimizing static power consumption, and higher biasing points maximize dynamic range, while improvi…
Abstract The high‐pressure crystallized bisphenol‐A polycarbonate/dioctyl phthalate (BAPC/DOP) blend samples were investigated using wide‐angle X‐ray diffraction (WAXD), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The specimens were prepared in a piston‐cylinder high‐pressure appara…
In this report the results of crystal structure investigations, high magnetic field measurements and electronic structure calculations carried out for the MnFe 1− x Co x P system are presented. The crystal structure parameters were determined using the x-ray powder diffraction method. On this basis the inter-atomic di…
Abstract The cure of polybutadiene rubber (BR) with sulfur donor dipentamethylene thiuram tetrasulfide (DPTT) does not show reversion reaction, in contrast with similar natural rubber compounds. No polysulfure links are formed; whereas a great amount of CC crosslinks are produced. The addition of tetramethyl thiura…
High quality quantum dots (QDs) CdSe were prepared using a novel and non-TOP method. Quantum dots of different sizes ranging from 2 to 4 nm could be obtained by removing aliquots of the reaction solution at different time intervals or by adjusting some reaction conditions. The CdSe quantum dots (core) were directly co…