Highly-ordered pyrolytic graphite

Mechanical Properties. The hexagonal symmetry of a graphite crystal causes the elastic properties to be transversely isotropic ia the layer plane only five independent constants are necessary to define the complete set. The self-consistent set of elastic constants given ia Table 2 has been measured ia air at room temperature for highly ordered pyrolytic graphite (20). With the exception of these values are expected to be representative of... [Pg.510]

Fig. 2. Raman spectra (T = 300 K) from various sp carbons using Ar-ion laser excitation (a) highly ordered pyrolytic graphite (HOPG), (b) boron-doped pyrolytic graphite (BHOPG), (c) carbon nanoparticles (dia. 20 nm) derived from the pyrolysis of benzene and graphitized at 2820°C, (d) as-synthesized carbon nanoparticles ( 850°C), (e) glassy carbon (after ref. [24]).

Figure 1. Reflectance spectra of Fe-TsPc in 0.1 M NaOH adsorbed on the basal plane of a highly ordered pyrolytic graphite (HOPG) electrode at 0.90 V vs. a-Pd and on a Pt electrode at 0.70 V with Ar (0) and O2 ( A ) saturated solutions. Reproduced with...

FIGURE 15.19 G band for highly ordered pyrolytic graphite (HOPG), MWNT bundles, one isolated semiconducting SWNT and one isolated metallic SWNT. (Reprinted with permission from [128], Copyright (2003) IOP Publishing Ltd.)... [Pg.506]

On highly ordered pyrolytic graphite, HOPG(OOOl) electrodes, no UPD has been detected owing to weak carbon-lead interactions [311]. Deposition occurs by three-dimensional island growth according to Volmer-Weber mechanism. Initial steps are controlled by progressive nucleation on active sites and hemispherical diffusion. [Pg.822]

Figure 10.2 Fe(CN) /4 voltammetry on glassy carbon (GC) fractured in solution, and on basal plane highly ordered pyrolytic graphite (HOPG). 1 mM K4Fe(CN)6 in 1 M KC1, scan rate = 0.2 V/s. AEp for fractured GC voltammogram = 64 mV, corresponding to k° > 0.1 cm/s, AEp for HOPG = 1005 mV, k° = 1 x 10 6 cm/s. Potential scale is relative to silver quasi-reference electrode.

$Figure 10.2 Fe(CN) /4 voltammetry on glassy carbon (GC) fractured in solution, and on basal plane highly ordered pyrolytic graphite (HOPG). 1 mM K4Fe(CN)6 in 1 M KC1, scan rate = 0.2 V/s. AEp for fractured GC voltammogram = 64 mV, corresponding to k° > 0.1 cm/s, AEp for HOPG = 1005 mV, k° = 1 x 10 6 cm/s. Potential scale is relative to silver quasi-reference electrode.$

Figure 10.3 Structure of highly ordered pyrolytic graphite.

A. Pyrolytic Graphite (PG) and Highly Ordered Pyrolytic Graphite (HOPG)... [Pg.304]

In an STM experiment the dendrimer sample deposited on a conductive substrate (e.g. highly ordered pyrolytic graphite (HOPG)) is scanned line-by-line with a fine conductive microscopy tip. Depending upon the measuring mode, a piezoelectric scanner moves either the microscopy tip over the sample surface or the sample under the fixed tip. The microscopy tip approaches the sample... [Pg.271]

Systems that employed HREELS for interfacial-composition determinations included poly(ethylene oxide)-polystyrene diblock copolymer on Si wafers formaldehyde poly(oxymethylene) films on Cu(lOO) and Lang-muir-Blodgett films of 4,4 -oxydianiline-pyromellitic dianhydride polyimide on Au and on highly ordered pyrolytic graphite. ... [Pg.6060]

Cgraphite A highly-ordered pyrolytic graphite (HOPG) electrode was polished so as to expose... [Pg.694]

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