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 کاملI n Situ Scanning Tunneling Microscopy of the Anodic Oxidation of Highly Oriented Pyrolytic Graphite Surfaces
The scanning tunneling microscope (STM) was used to follow the in situ anodic oxidation of highly oriented pyrolytic graphite (HOPG) in 0.1 M H2S04. Prior to electrochemical cycling, the HOPG surface appeared atomically flat and atomic structure was observed with the surface under potential control. Cycling between 0.0 and 1.8 V vs AgQRE (silver wire quasi-reference electrode) resulted in the f...
متن کاملElectrochemical oxidation of 6-hydroxy-2,4,5- triaminopyrimidine at pyrolytic graphite electrode
The electrochemical ox idation of 6-hydroxy-2,4,5-triaminopyrimidine (I) at pyrolytic graphite electrode has been studied in phosphate buffers of pH range 2.5-10.8. Under cyclic voltammetric conditions, the 2e, 2H+ ox idation of this compound is fo und to give alloxan, which has been characterized on the basis of IR, mass and NMR spectral data. The kinetics of the decay of the UV -absorbing int...
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 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: 1964
ISSN: 1884-5495,0371-5345
DOI: 10.7209/tanso.1964.40_19