脉冲宽度导致的石墨表面纳米结构尺度变化的STM观察

材料表面进行的纳米加工探索已经成为研究纳米尺度上的化学现象的重要途径。大量实验数据表明，利用ＳＴＭ进行的表面纳米加工过程是同时受到强电场和高电流密度的作用而诱导的局部氧化或聚合反应等。

Dimensional variation of nanofeatures on graphite surface associated with pulse duration using STM

We have studied the dependence of nanofabrication on the pulse duration explicitly with STM,using graphite as an example.It is demonstrated that,under comparable conditions, the depth of the as generated craters has monotonic correlation with the pulse duration,while the apparent surface diameters do not show significant changes.This is believed to be the direct evidence that the electron induced gasification reaction of the carbon atoms did involve during fabrication,rather than field evaporation mechanism.