Characterization of Field Emission from Nano-Scale Diamond Tip Arrays

概要

論文の詳細を見る
Nano-scale diamond tip arrays on single crystals (100) are fabricated by plasma etching and their field emission characteristics are studied. We fabricate three types of structures: ordered tips with a high density, ordered tips with a low density and an unordered whisker structure. In field emission measurements, the ordered tips with a low density have better field emission than the ordered tips with a high density and the unordered whisker structure. Field enhancement factors are estimated from Fowler-Nordheim plots ($\beta_{\text{FN}}$) and tip geometry ($\beta_{\text{tip}}$). Although the $\beta_{\text{FN}}$ is almost the same as the $\beta_{\text{tip}}$ for the ordered tips with a low density, the $\beta_{\text{FN}}$s of the ordered tips with a high density and the unordered whisker structure are one order smaller than the $\beta_{\text{tip}}$s. This indicates that using a tip array with a low density helps in reducing the neighboring shielding effects, thereby leading to $\beta_{\text{FN}}$ similar to $\beta_{\text{tip}}$. We found experimentally that the tip arrangement plays an important role in the field emission from diamond.
Japan Society of Applied Physicsの論文
2005-03-10