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Characterizing the local oxidation nanolithography on highly oriented pyrolytic graphite
Nanotechnology, 2019Abstract Here, we characterize the patterns obtained through local oxidation nanolithography (LON) on highly oriented pyrolytic graphite as the write bias, speed, and force were varied. Different types of patterns—bumps, cracked bumps, and trenches—were obtained and characterized using four shape descriptors—pattern width, pattern ...
Zachary H Swart +3 more
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Nucleation and growth of cobalt nanostructures on highly oriented pyrolytic graphite
Physical Chemistry Chemical Physics, 2006Cobalt in the form of three-dimensional (3D) hemispherical clusters (size approximately 10-30 nm) were observed to grow on pristine graphite surfaces via a Volmer-Weber growth mode. X-Ray photoelectron spectroscopy (XPS) reveals that these clusters are physisorbed on the surface.
Poon, S.W., Pan, J.S., Tok, E.S.
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Bioelectrochemistry, 2012
The electrochemical behavior of lamotrigine (LMT) at the pyrolytic graphite electrode (PGE) is investigated in detail by the means of cyclic voltammetry. During the electrochemical reduction of LMT, an irreversible cathodic peak appeared. Cyclic voltammetric studies indicated that the reduction process has an irreversible and adsorption-like behavior ...
Reyhaneh-Sadat, Saberi +1 more
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The electrochemical behavior of lamotrigine (LMT) at the pyrolytic graphite electrode (PGE) is investigated in detail by the means of cyclic voltammetry. During the electrochemical reduction of LMT, an irreversible cathodic peak appeared. Cyclic voltammetric studies indicated that the reduction process has an irreversible and adsorption-like behavior ...
Reyhaneh-Sadat, Saberi +1 more
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Multiscale Fracture in Peeling of Highly Oriented Pyrolytic Graphite
Key Engineering Materials, 2013Micromechanical cleavage is one of the methods used for isolation of single-and few-layer graphene sheets from bulk graphite. On the surface of peeled graphite flakes, nanosteps of precisely multiple-layer thickness are often observed. The nanosteps are believed to be termination edge of graphene sheets and formed by tearing graphene sheets sandwiched ...
Bo Yang, N. Vijayanand
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Terahertz plasmonic properties of highly oriented pyrolytic graphite
Applied Physics Letters, 2013We demonstrate that highly oriented pyrolytic graphite is a potentially useful material for plasmonic applications in the terahertz (THz) spectral range. Using THz time-domain spectroscopy, we studied the transmission properties of a ∼7.5 μm thick graphite film made via mechanical exfoliation and found that the complex dielectric constant follows the ...
T. D. Nguyen +4 more
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VUV photochemistry of oriented molecules: methylchloride on highly oriented pyrolytic graphite
Surface Science, 1997The photoionization of CH3Cl adsorbed on highly oriented pyrolytic graphite has been investigated as a function of the photon energy in the range 13-35 eV. Two ions were detected -CH3+ and H+ - which show differences in their coverage and energy dependences.
J. Wilkes +4 more
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Anisotropic friction behaviour of highly oriented pyrolytic graphite
Carbon, 2013Friction tests on two surfaces of highly oriented pyrolytic graphite that are parallel and perpendicular to the direction of the graphite basal plane were performed under various test conditions. The average friction coefficient value of the perpendicular surface (0.25) is higher than that of the parallel surface (0.1). The friction coefficient of both
Jinkun Xiao +5 more
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SPIE Proceedings, 1999
Highly Oriented Pyrolytic Graphite is a very efficient and well-known x-ray and neutron monochromator. The crystal macroscopic properties are determined by its microscopic structure. Our aim is to study the crystal internal structure and correlate it with the crystal optical behavior.
TUFFANELLI A. +6 more
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Highly Oriented Pyrolytic Graphite is a very efficient and well-known x-ray and neutron monochromator. The crystal macroscopic properties are determined by its microscopic structure. Our aim is to study the crystal internal structure and correlate it with the crystal optical behavior.
TUFFANELLI A. +6 more
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Infrared Reflection Spectroscopy of Thin Films on Highly Oriented Pyrolytic Graphite
Applied Spectroscopy, 2003The properties of highly oriented pyrolytic graphite (HOPG) as a substrate for external reflection infrared spectroscopy in the mid-infrared region were investigated. Clean HOPG substrates, physisorbed hydrocarbon multilayers, and chemisorbed monolayers of p-substituted aryl radicals on HOPG were used as samples, and the experimental spectra were ...
Thomas, Leitner +2 more
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Pathway for the Transformation from Highly Oriented Pyrolytic Graphite into Amorphous Diamond
Physical Review Letters, 2009We report the discovery of a novel pathway for the transformation from highly oriented pyrolytic graphite foils into amorphous diamond platelets. This pathway consists of three stages of neutron irradiation, shock compression, and rapid quenching. We obtained transparent platelets which show photoluminescence but no diamond Raman peak, similar to the ...
Niwase Keisuke +4 more
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