科研之友
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摘要
We demonstrate atom manipulations of the Si(111)-(7 X 7) surface with small amplitude dynamic force microscopy at room temperature. Adatoms could not only be extracted and attached but also laterally manipulated in and over the half unit cell with a repulsive interaction force caused between the tip and the sample. In the case of a tip condition that gave a strong image contrast, an adatom beside a vacancy could be pulled to the neighboring stable site with a strong attractive force. Enhanced detection sensitivity due to the small amplitude of 4 angstrom could avoid accidental modifications of the surface during imaging.
- 出版日期2006-7-10
