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Surface conducting layer, diamond

The hydrogen-terminated diamond surface also exhibits a p-type conduction. The surface structure, electronic properties, etc. have been extensively studied. This subject has a long history of research, and the readers can refer to Ref. [137] on this topic. Simply summarizing the results obtained so far, the thickness of the Surface conducting layer is 30-100 A, and the hole density at room temperature is approximately 10 /cm. ... [Pg.283]

In the case of heavily boron-doped diamond films, the effect of the removal of the surface conductive layer [l] on the surface... [Pg.220]

In the case of the CVs obtained in 0.1 M NaC104 solution containing 1 mM Fe(C104)3, the AEp value became smaller after surface oxidation treatment (Fig. 10.2c). This fact indicates that the apparent electron transfer at the diamond surface was accelerated by the surface oxidation treatments. These results clearly suggest that the change of the apparent electron transfer rate should be attributed to causes other than a decrease in the boron concentration as a result of plasma sputtering or the removal of the surface conductive layer. [Pg.222]

For PIGE measurements, transverse bone sections are cut with a diamond saw and polished with SiC paper, and then placed directly in front of the external proton beam. It is not necessary to coat the sample surface with a conductive layer as the charges are dissipated in air and helium. Step width of the concentration profiles is determined by precisely recorded sample translation in front of the beam. The above experimental conditions were used for F analysis in archaeological bone materials in the applications described in this chapter. [Pg.264]

In terms of science, it is expected that diamond still has some new properties that have never been exploited yet. Since the establishment of diamond CVD technology, the controlled doping for p- and n-type semiconductors, the presence of the ultrathin conducting layers of hydrogen-terminated surface, the negative... [Pg.289]

A unique MESFET utilizing a smface conducting layer as a channel was developed at Waseda University (63,64). As described earlier in Sec. Ill, the hydrogenated surface of diamond is known to behave as p-type. Using this layer as a channel, a MESFET has successfully... [Pg.398]

Second, a diamond surface with NEA exhibits a novel doping mechanism that relies on the low ionization energy of diamond with NEA. This transfer doping mechanism yields a subsurface hole accumulation layer and a concomitant high surface conductivity (SC) that is discussed in volume 6. Field effect transistors (FETs) based on this kind of SC have been built [33-35], and attempts are being made to exploit the sensitivity of SC in diamond for ion-sensitive electronic devices such as ion-sensitive FETs (ISFETs) [36, 37]. [Pg.427]

Surface oxidation can modify the surface groups on diamond surfaces [47,48], as well as the surface conductivity. Surface groups generated on diamond may depend on the type of surface crystal face [49] (Fig. 8.7). For example, the ideal (lOO) diamond surface has two chemical bonds for a single carbon atom in the first surface layer, and thus carbonyl and bridging ether groups... [Pg.162]

Thin-film electrode — An electrode covered with a thin film of a given substance. The purpose of placing a thin film on the electrode surface is to obtain desired electrode properties. Many different substances have been used to prepare film electrodes they include among others mercury (see - thin mercury film electrodes) gold, boron-doped diamond (see - boron-doped diamond electrode), conductive polymers (see - polymer-modified electrode), and alkanethiols. The film thickness can vary from several micrometers (mercury) to monomolecular layers (thiols). In some cases (e.g., for - spectroelectrochemistry purposes) very thin layers of either gold or tin oxide are vapor-deposited onto glass plates. Thin film electrodes are often called - surface-modified electrodes. [Pg.672]

Numerous other fields of diamond film application are known, and more are sure to emerge in the future. One potential application makes use of the diamond films high thermal conductivity, which by far exceeds that of any other bulk material. Hence, diamond is suitable for heat dissipation, for example, in electronic circuitry. For instance, a surface may be coated with a layer of CVD diamond which then effects the removal of heat Another conceivable setup would be using a... [Pg.447]


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See also in sourсe #XX -- [ Pg.398 ]




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Conducting layers

Conductive surfaces

Conductivity diamond

Conductivity surface

Layered surfaces

Surface conductance

Surface conducting

Surface layers

Surfaces conduction

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