Materials Literature
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Diamond-like carbon (DLC) films were deposited on glass substrate by sputtering of a vitreous carbon target in Ar + H 2 plasma. The sp 2 /sp 3 content in the films depended on the relative amount of hydrogen in the Ar + H 2 plasma. The films were characterized by Fourier transformed infrared studies, Raman studies, sc…
SU-8 is a chemically amplified, epoxy-based negative photoresist typically used for producing ultrathick resist layers during device manufacturing in the semiconductor industry. As a simple resist, SU-8 has garnered attention as a possible material for a variety of biomedical applications, including tissue engineering…
Five N-aryl-N-pyridylaminoxyls, which have no substituent (PhNOpy), one substituent (MeOPhNOpy and tert-BuPhNOpy) at the 4-position, and three substituents (TPPNOpy and TBPNOpy) at the 2, 4, and 6-positions of the phenyl ring, were prepared as new ligands for cobalt-aminoxyl heterospin systems. The 1:4 complexes, [Co(…
Hierarchical ZnO microspheres constructed by mesoporous quasi-single-crystalline ZnO nanosheets were fabricated by pyrolysis of the microspheres of layered hydroxide zinc carbonate, Zn 5 (CO 3 ) 2 (OH) 6, which was the hydrothermal precipitate of zinc nitrate and urea. A growth mechanism of Zn 5 (CO 3 ) 2 (OH) 6 micro…
Abstract Microencapsulated ammonium polyphosphate (MCAPP) with a melamine–formaldehyde (MF) resin coating layer was prepared by in situ polymerization. MCAPP was characterized by Fourier transform infrared, X‐ray photoelectron spectroscopy, and so on. The results show that the microencapsulation with MF resin leads to…
Electron paramagnetic resonance (EPR) has been used to monitor oxygen vacancies and zinc vacancies in a ZnO crystal irradiated near room temperature with 1.5MeV electrons. Out-of-phase detection at 30K greatly enhances the EPR signals from these vacancies. Following the electron irradiation, but before illumination, F…
We report the growth of undoped and Fe (2 and 5at.%) doped molybdenum oxide thin films on c-plane of sapphire substrate using pulsed laser ablation. X-ray diffraction results show that the films are oriented in the (100) direction and have monoclinic structure based on MoO2 phase as also supported by Raman spectroscop…
Using single-crystal transistors, we have performed a systematic experimental study of electronic transport through oxidized copper/rubrene interfaces as a function of temperature and bias. We find that the measurements can be reproduced quantitatively in terms of the thermionic emission theory for Schottky diodes, if…
We study electromagnetic properties of periodic composite structures, such as photonic crystals, involving lossy components. We show that in many cases a properly designed periodic structure can dramatically suppress the losses associated with the absorptive component, while preserving or even enhancing its useful fun…
Using first-principles calculations within the generalized gradient approximation, we predicted the lattice parameters, elastic constants, vibrational properties, and electronic structure of cementite (Fe3C). Its nine single-crystal elastic constants were obtained by computing total energies or stresses as a function…
Synchrotron-based photoemission electron microscopy (XPEEM) is one of the most powerful spectro-microscopic techniques for the investigation of surfaces, interfaces, thin films and buried layers. By exploiting the tunability and polarizability of x-ray sources as well as progress in electron optics design, modern XPEE…
In this paper, we report on the effect of Sm doping on the phase evolution and properties of phase-pure Bi1−xSmxFeO3 (BSFO) ceramics synthesized via a conventional solid-state-reaction method. We find that upon calcination, Sm doping of bismuth ferrite promotes the formation of perovskitic phase and leads to the elimi…
The best of both worlds: Multifunctional Fe3O4@[email protected] shell nanoparticles (see scheme; Fe3O4 is black, polymer is blue, gold shell is brown) display good dispersibility and stability in aqueous solution. Strong magnetization and good NIR absorption are preserved in the core–shell structures. These features…
5 μ m thick SmCo films were deposited onto Si substrates using triode sputtering. A study of the influence of deposition temperature (Tdep⩽600°C) on the structural, magnetic, and mechanical properties has shown that optimum properties [highest degree of in-plane texture, maximum in-plane coercivity and remanence (1.3…
In recent years there have been reports of anomalous electrical resistivity and the presence of superconductivity in semiconducting InN layers. By a careful correlation of the temperature dependence of resistivity and magnetic susceptibility with structural information from highresolution x-ray diffraction measurement…
Pressure-induced phase transitions of spin-crossover materials are studied in a microscopic model taking into account the elastic interaction among distortions of lattice due to the difference of the molecular sizes between the high-spin state and the low-spin state. We perform Monte Carlo simulations in the constant…
We report the observation of channel-width dependent enhancement in nanoscale field effect transistors containing lithographically-patterned silicon nanowires as the conduction channel. These devices behave as conventional metal-oxide-semiconductor field-effect transistors in reverse source drain bias. Reduction of na…
Pinning interaction between a screw dislocation and a void in fcc copper is investigated by means of molecular dynamics simulation. A screw dislocation bows out to undergo depinning on the original glide plane at low temperatures, where the behavior of the depinning stress is consistent with that obtained by a continu…
Abstract The use of multi‐walled carbon nanotubes (MWCNT) as reinforcing material for thermoplastic polymer matrices, polymethyl methacrylate (PMMA), and polystyrene (PS) has been studied. MWCNT were synthesized by chemical vapor deposition (CVD) technique using ferrocene‐toluene mixture. As‐prepared nanotubes were ul…
Biostable polyurethanes (PURs) have been incorporated in biomedical devices since the 1960s. The mechanisms of degradation and compositions with improved in vivo biostability have been investigated extensively. In recent years, biodegradable PURs have been investigated for applications in regenerative medicine. In con…