脉冲宽度导致的石墨表面纳米结构尺度变化的STM观察  

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

作　　者：吴际[1] 王琛[1] 裘晓辉[1] 商广义[1] 王乃新[1] 白春礼[1] 

机构地区：[1]中国科学院化学研究所

出　　处：《电子显微学报》1999年第1期61-64,共4页Journal of Chinese Electron Microscopy Society

摘　　要：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物理和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。在此，我们以石墨表面的纳米加工为例，发现在相似的实验条件下，纳米下陷结构的深度随加工脉冲时间的增长而显著增加，而该结构的表面直径变化则相对较小。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.

关 键 词：纳米加工 石墨表面 STM 脉冲宽度 

分 类 号：TN304.18[电子电信—物理电子学] TH－39[机械工程]