SCANNING TUNNELING MICROSCOPE-PROMOTED GROWTH OF NANOMETER-SCALE, UNIFORM GOLD STRIPES ON RECONSTRUCTED AU(111) SURFACES
SCANNING TUNNELING MICROSCOPE-PROMOTED GROWTH OF NANOMETER-SCALE, UNIFORM GOLD STRIPES ON RECONSTRUCTED AU(111) SURFACES
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DOI：
10.1063/1.350562
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发表时间：
1992-06-01
影响因子：
3.2
通讯作者：
MOSKOVITS, M
中科院分区：
文献类型：
--
作者：
WANG, ZH;MOSKOVITS, M
扫描Au(111)(22+/-1)x平方根3重构表面上的扫描隧道显微镜(STM)针尖导致单原子条纹优先在表面的面心立方部分生长。可以生长几个100 nm长、大约4 nm宽、间隔从2到大约4 nm(重建表面的hcp区域)的条纹。只有当扫描方向与重建的[1，1，-2]主方向或多或少一致时，才会形成条纹。生长的速度比仅用扩散解释的要快得多，这导致了STM尖端将先前从表面其他部分拾取的黄金输送到条纹的生长末端。用这种方法生长的条带可以作为分子束外延生长量子线结构的方便模板。
Scanning the scanning tunneling microscopy (STM) tip on a Au(111) (22 +/- 1) x square-root 3 reconstructed surface causes monatomic stripes to grow preferentially on the fcc portions of the surface. Stripes several 100 nm's in length, approximately 4 nm wide, and separated by spaces ranging from 2 to approximately 4 nm (the hcp regions of the reconstructed surface) can be grown. Stripe formation only takes place when the scan direction corresponds, more or less, with the [1,1,-2] primary direction of the reconstruction. Growth occurs much more rapidly than can be accounted for by diffusion alone, leading to the conclusion that the STM tip transports gold, previously picked up from other portions of the surface, to the growing ends of the stripes. Stripes grown in this way may serve as convenient templates for subsequent growth of quantum wire structures by molecular beam epitaxy.