Materials Literature
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Dynamical disorder in negative thermal expansion compound Zn(CN)2 is investigated by quasielastic neutron scattering technique in the temperature range 170-320 K. Significant quasielastic broadening is observed above the phase transition temperature of about 250 K, however no broadening is observed at 220 K and below.…
The heteroepitaxial growth of type-B ferromagnetic MnAs on InP and lattice matched In 0.53 Ga 0.47 As has been investigated for the first time. In situ reflection high energy electron diffraction during molecular beam epitaxy and atomic force microscopy are used to study the reconstruction and morphology, respectively…
The controlled fabrication of actively switchable atomic-scale devices, in particular transistors, has remained elusive to date. Here we explain operation of an atomic-scale three-terminal device by a novel switching mechanism of bistable, self-stabilizing reconstruction of the electrode contacts at the atomic level:…
The use of bearings can be found in virtually all aspects of mechanical systems today. Reliability of these critical components is an important issue. Fatigue performance of bearings is a function of many factors, including service conditions, loading, material properties, environmental factors, and manufacturing proc…
Sonoluminescence is the intriguing phenomenon of strong light flashes from tiny bubbles in a liquid. The bubbles are driven by an ultrasonic wave and need to be filled with noble gas atoms. Approximating the emitted light by blackbody radiation indicates very high temperatures. Although sonoluminescence has been studi…
U posljednje vrijeme postoje razne kalkulacije o streljivu koje koristi osiromašeni uranij, a koje je upotrebljavano tijekom rata u Bosni i Hercegovini (1992.-1995.).Pored toga, podruèje Bosne i Hercegovine bilo je pod izravnim utjecajem globalnih disperzijskih procesa u razdoblju mjeseca svibnja 1986.godine, kao posl…
This chapter contains sections titled: Introduction Calibration Approaches Microscopic Calibration Methods Macroscopic Calibration Methods Conclusion Acknowledgements References
The self-assembly of thiophene-containing dextran and cyclodextrin derivatives on gold surfaces was investigated. Morphological studies (AFM) and the elemental characterization (XPS) of the surfaces show that the carbohydrate derivatives form either aggregates or uniform films depending on the structure and the solven…
Strain effect on La0.67Ca0.33MnO3 and La0.8Ba0.2MnO3 films is investigated by x-ray diffraction and x-ray absorption spectrums. Findings show that due to the different ionic sizes of doped Ca or Ba ions, the strain effect acts differently in the way it deforms. The interfacial strain effect produces opposite influence…
Two new poly(aryl ether) dendritic structures carrying a donor (4-methyl-7-hydroxycoumarin) on the surface as dendrons and calix[4]arenes as a core were synthesized through a convergent synthetic approach. Poly(aryl ether) dendritic structures are connected through ether bonds on the lower rim of calix[4]arene unit. I…
Summarizing a Decade of Experience on Charge Reduction for Small Hydrocarbon, Ammonia and HFC Systems
Abstract In einem dynamischen Prozess bilden Peptide nach der Adsorption auf einer Au(111)‐Oberfläche über Oberflächendiffusion und mehrere Dünnfilmtopologien bestimmte Anordnungen (siehe Schema und entsprechende AFM‐Bilder). Diese grundlegende Beobachtung könnte für die Entwicklung von molekularen Hybridmaterialien a…
The angular dependence of the ac susceptibility for the magnetic field rotated in the CuO2 plane of a stripe-ordered La1.45Nd0.4Sr0.15CuO4 single crystal shows an unusual fourfold symmetry below the superconducting transition temperature (Tc). The real part of the ac susceptibility reaches its maximum for the magnetic…
Abstract This paper presents an identification technique of parameters of a high‐frequency equivalent circuit of permanent magnet synchronous motors (PMSM) driven by a PWM inverter. The high‐frequency oscillatory currents such as leakage current to the motor frame (common‐mode current) and high‐frequency oscillatory l…
Copolymers of bisphenol A-diglycidyl ether with thiophene side-groups and pyrrole were synthesized by electrochemical polymerization. Bisphenol A-diglycidyl ether with thiophene side-groups (DGEBATh) was obtained from the reaction between bisphenol A-diglycidyl ether (DGEBA) and thiophene-3-acetic acid. The syntheses…
This chapter contains sections titled: System Rationale Characterization of Error in Weight Measurements Discussion of Experiments and Activities Conclusions Acknowledgement References
We have developed a simple method to synthesize organic-inorganic films containing a Pb(II) acrylate precursor in a silicon-methacrylate solution in the presence of a photoactive compound. Film deposition is achieved by simple spin coating, and the presence of a photoactive compound enables rapid polymerization when t…
We report findings on the asymmetrical current properties on both the source-drain and back-gate voltage (VBG) dependence (unconventional ambipolar behavior) found in a double-walled carbon nanotube (DWNT) field-effect transistor, which has electrode contacts to different layers. We also find Coulomb oscillations with…
Abstract Mit der laserinduzierten Inkandeszenz (LII) wurden Messungen an 14 verschiedenen Industrierußen (Carbon Blacks) durchgeführt, um den Einfluss der Aggregatgröße auf die Bestimmung von Primärteilchengrößen mit dieser Technik zu untersuchen. Durch Vergleich der gemessenen Werte mit elektronenmikroskopischen Aufn…
The electrical and optical properties of the In-rich InAlN alloys are strongly influenced by native point defects. Here the effects of the defects are studied using 2?MeV He+ irradiation to vary the defect concentration. Localized native defects in In1?xAlxN(x < 0.45) are predominantly donors, with energy levels locat…