Abstract
Abstract Electron transport and electron field emission of nanometer-size diamond powders coated on quartz and n + -type Si substrates have been characterized. The nanodiamond powders were synthesized by explosive detonation. The measurement of temperature-dependent conductivity shows that the conduction of the nanodiamond coating is non-Arrhenius leading to an interesting behavior at low temperatures. The material shows a good behavior of electron field emission. In the electric field range from 3 to 5 V/μm, the emission can be approximately described by the Fowler–Nordheim (F–N) equation. A stable emission current density as high as ∼95 mA/cm 2 was obtained under an applied field of 5 V/μm. It has been suggested that the novel electron transport and the high emission current density of the samples might originate from their non-continuous network structure of the nanodiamond particles.
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