【作者】 李志扬； 刘武； 黄光明； 张爱东； 李兴教；

【Author】 Li Zhiyang Liu Wu Huang Guangming Zhang Aidong Li Xingjiao~* (Department of Physics,Huazhong Normal University,Wuhan 430070)(*Department of Solid Electronics,Huazhong University of Science and Technology,Wuhan 430074)

【机构】 华中师范大学物理系； 华中理工大学固电系；

【摘要】 用金作 STM 针尖,通过一个窄脉冲电压(～4V,～300ns)．可在原子平坦的 Au 表面稳定观察到原子堆的形成。用这种方法我们成功地进行了纳米书写。实验表明原子堆的形成存在一个很陡的阈值电场,而且正负电压脉冲皆可形成原子堆,我们初步认为它是一个场离子蒸发过程。更多还原

【Abstract】 Atom mounds were formed by appling 4V,300ns voltage pulses on Au tip in scanning tunneling microscope (STM)in atomsphere.Each mound measures about 30 nm in diameter and 1-2 nm in height.With the aid of this,we succeed in writing nanometer scale characters.There exists a narrow threshold field and we refer it a field evaporation process.Both positive and negative ions could be field evaporated.The re-examination of charge-exchange model for the field evaporation in STM and experiments on other metals will be published else- where.更多还原