Assembling and Disassembling Ag Clusters on Si(111)-(7 x 7) by Vertical Atomic Manipulation

被引：23

作者：

Ming, Fangfei ^{[1
]}

Wang, Kedong ^{[1
]}

Pan, Shuan ^{[1
]}

Liu, Jiepeng ^{[1
]}

Zhang, Xieqiu ^{[1
]}

Yang, Jinlong ^{[2
]}

Xiao, Xudong ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscales, Hefei 230026, Anhui, Peoples R China

来源：

ACS NANO | 2011年 / 5卷 / 09期

关键词：

scanning tunneling microscopy; Si(111)-(7 x 7); vertical manipulation; metal on semiconductor; nanocluster; SCANNING TUNNELING MICROSCOPE; CATALYTIC-ACTIVITY; ROOM-TEMPERATURE; SINGLE ATOMS; GOLD; MOLECULES; SURFACE; GROWTH; AU-20;

D O I：

10.1021/nn202636g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Atomic manipulation has been rawly used in the studies of complex structures and a low temperature requirement usually limits its application. Herein we have demonstrated a vertical manipulation technique to reproducibly and reversibly manipulating Ag atoms on an Si(111)-(7 x 7) surface by a scanning tunneling microscope tip at room temperature. Simple and complex Ag nanoclusters were assembled and disassembled with a precise control of single Ag atoms, which provided critical information on the size of these nanoclusters. The manipulation showed the growth processes of these Ag clusters and even partly unveiled their atomic structures. This technique can form a fundamental basis for further studies of the Ag/Si(111)-(7 x 7) system and for fabricating functional nanodevices in various metal-semiconductor systems.

引用

页码：7608 / 7616

页数：9

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