منابع مشابه
Crumpling of a pyrolytic graphite sheet
Crumpled graphite thin film balls were fabricated with Panasonic Pyrolytic Graphite Sheets (PGS). The fractal dimension, mechanical properties, and electrical conductivity of the crumpled PGS balls have been investigated. The universal local fractal dimension of the PGS balls is found to be 2.58, which is consistent with that of paper balls. The crumpled PGS balls show good mechanical property ...
متن کاملStudy of the growth of NiO on highly oriented pyrolytic graphite by X-ray absorption spectroscopy
In this work, we present a X-ray absorption spectroscopy (XAS) study of the growth of NiO on highly oriented pyrolytic graphite (HOPG). NiO as been grown by reactive evaporation of metallic Ni in an oxygen atmosphere (2× 10−5 Torr) at room temperature. We paid special attention to he study of the early stages of growth. Both, Ni 2p and O 1s core-level XAS spectra were measured. For large NiO co...
متن کاملUFM observation of lattice defects in highly oriented pyrolytic graphite
Ultrasonic force microscopy (UFM) can be used to image the distribution of elastic modulus up to several tens of GPa, which is not possible by the force modulation mode using a soft cantilever of spring constant less than 1 N m‘. It was shown that by careful design of a piezoelectric transducer, together with a sample with small friction force, deflection vibration of the cantilever without tor...
متن کاملNucleated Growth of Iron Pyrite on Highly Oriented Pyrolytic Graphite (HOPG) by Chemical Vapor Deposition (CVD)
Iron pyrite, one of the phases in the FeS2 system, is a promising semiconductor for use in solar cell applications due to its earth-abundance, high absorption coefficient, and suitable bandgap. However, currently the efficiency of iron pyrite solar cell device does not exceed 3% [1]. Many studies attempted to understand the cause of the low open-circuit voltage in pyrite devices. Some studies s...
متن کاملExtinction of ferromagnetism in highly ordered pyrolytic graphite by annealing
We report that the ferromagnetism of highly ordered pyrolytic graphite (HOPG) samples as measured by hysteretic magnetization loops can be diminished and eventually extinguished with sufficiently long high vacuum anneals at temperatures on the order of 2300 !C. Concomitant with the extinction of ferromagnetism, we observe an annealinduced increase in grain size (accompanied by possible edge rec...
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ژورنال
عنوان ژورنال: TANSO
سال: 1975
ISSN: 1884-5495,0371-5345
DOI: 10.7209/tanso.1975.116