Materials Literature
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2,3-Didecyloxyanthracene (DDOA) is able to gel a large variety of organic solvents at very low concentrations by forming a three-dimensional network of fibers. A vibrational assignment is proposed for the midinfrared absorptions of DDOA in the gel and solution states, showing that some out-of-plane vibrations of the a…
We have proposed and evaluated the novel three-dimensional on-chip variable inductor that is fabricated using microelectromechanical systems technology. The variable inductor was made of thin film metallic glass, Pd 76 Cu 7 Si 17 , that has high flexibility. Since the thin film metallic glass has high elasticity, the…
Pore formation in n-type III–V semiconductors will be discussed and compared to pore formation in silicon. While by now many different kinds of pores were produced in silicon, the “pore zoology” in III–Vs was rather limited until recently. This paper will briefly review the specific pore morphologies in some compound…
High quality Mn-doped GaN and AlN films grown by molecular beam epitaxy have been investigated with X-band electron spin resonance (ESR). The observed resonance patterns are well described by the spin Hamiltonian for isolated ${}^{55}{\mathrm{Mn}}^{2+}$ centers with electronic spin $S=5/2$ and nuclear spin $I=5/2.$ Is…
Phosphorus (P)-doped carbon (n-C) films are deposited by pulsed laser deposition technique using a camphoric C target. The activation energy increased to approximately 0.23 eV for the film deposited using a 1% P target compared to undoped C film (0.17 eV), after which it decreases with further increase in P content to…
Although endothelial cell (EC) seeding improves the patency of vascular prostheses, the detachment of adherent ECs after the restoration of circulation remains one of the major obstacles. Polymer surfaces for endothelialization can be optimized. In this study, polyethylene terephthalate (PET), polypropylene (PP), poly…
Abstract Four (BEDT‐TTF) 4 A[M(C 2 O 4 ) 3 ]·DMF (DMF = dimethylformamide) salts of the organic donor molecule bis(ethylenedithio)tetrathiafulvalene (BEDT‐TTF) with metal oxalate anions, where A = (NH 4 , K), M = Cr ( 1 ); A = NH 4 , M = Fe ( 2 ); A = K, M = Cr ( 3 ); and A = NH 4 , M = Cr ( 3′ ) were prepared by elec…
As a direct metal patterning method, local electrodeposition of Ni onto porous silicon (PS) is studied. The principle of the method in this research utilizes the photo-excitation of semiconductor, in contrast to the previous studies of laser assisted metal deposition, in which the deposition is enhanced by heating eff…
We have investigated hybrid organic-inorganic systems composed of silicon–porous silicon and poly(phenylene vinylene) (PPV) in order to fabricate new light emitting devices, having properties of both materials. The key concern in these systems is the control of the penetration of the polymer into the pores of the semi…
The deposition of nickel (Ni) onto a porous silicon (PS) layer by immersion plating from acidic and alkaline fluoride solutions has been studied. In an immersion plating bath of simple hydrofluoric acid (HF) of pH 2 containing Ni ions, no metal deposition was observed. However, visible metallic Ni was deposited from t…
Porous silicon can be used as separation layers in layer transfer technology where a thin layer of crystalline silicon is separated from a large wafer and transferred onto a cheap foreign substrate. The porous layers are part of the fabrication process and undergo the processing treatment, especially the thermal treat…
We report the temperature dependent cross-plane thermal conductivities of Ge quantum dot superlattices measured by the 3\ensuremath{\omega} method. A large reduction in the thermal conductivity of the superlattices compared with that of bulk materials is observed. A simple model taking into account the relaxation time…
In this paper we study the dynamics of pore coarsening in porous silicon during annealing. We model the sintering of pores with two-dimensional and three-dimensional simulations. We compare our simulations with transmission and scanning electron micrographs of experimentally annealed porous silicon samples. Simulation…
The aim of this work is to explain the influence of the solvent molecules on silicon dissolution using several hydrofluoric acid containing “organic” electrolytes. The investigations focus on the morphology of the mesopores and macropores and the electrochemical valence of the overall reaction. Some basic properties o…
Data published during the last 15 years on the intercalation of metal and n-alkylammonium ions, organic molecules and organometallic complexes in vanadium(V) oxide xerogel are generalised and described systematically. The possible mechanisms of intercalation processes are considered. The possibility of using hybrid ma…
The effect of O/Zn flux ratio on the crystalline quality of ZnO films grown at 700°C by plasma-assisted molecular beam epitaxy was investigated. Zinc beam flux ( F Zn ) was varied from 2.2≤ F Zn ≤8.3 Å/s with an O 2 flow rate of 3 sccm and RF power of 300 W. The surface morphology of the ZnO layers strongly depended o…
Abstract Starting with Co‐salt‐loaded inverse micelles, which form if the diblock copolymer polystyrene‐ block ‐poly(2‐vinylpyridine) is dissolved in a selective solvent like toluene and CoCl 2 is added to the solution, monomicellar arrays of such micelles exhibiting a significant hexagonal order can be prepared on to…
This paper presents an extensive and systematic analysis of the oxygenation of semiconducting and metallic single-wall carbon nanotubes by using the first principles pseudopotential plane wave method. Our study involves the physisorption of oxygen molecules, chemisorption of oxygen atoms and formation of an oxide, and…
Collagen is an integral part of many types of connective tissue in animals, especially skin, bones, cartilage, and basement membranes. A fibrous protein, collagen has a triple-helical structure, which is comprised of strands with a repeating Xaa-Yaa-Gly sequence. l-Proline (Pro) and 4(R)-hydroxy-l-proline (4-Hyp) resi…
Abstract Four series of dyes with dimethylamino electron donor groups and N ‐R‐pyridinium (R = methyl Me, phenyl Ph, 2,4‐dinitrophenyl 2,4‐DNPh, or 2‐pyrimidyl 2‐Pym) electron acceptors are studied as their hexafluorophosphate salts. The intramolecular charge‐transfer (ICT) energies ( E max ) of these compounds decrea…