Formation of quantum dots in single stranded DNA-wrapped single-walled carbon nanotubes

被引：2
|
作者：
Li, Y. F. [1 ]
Kaneko, T. [1 ]
Hatakeyama, R. [1 ]
机构：
[1] Tohoku Univ, Dept Elect Engn, Sendai, Miyagi 9808579, Japan
来源：
APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 02期
关键词：
atomic force microscopy; carbon nanotubes; charge exchange; DNA; molecular biophysics; nanobiotechnology; quantum dots; tunnelling; ROOM-TEMPERATURE; ELECTRON TRANSISTOR; MICROSCOPY; WIRES;
D O I：
10.1063/1.3284511
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The transport properties of single-stranded DNA (ssDNA) wrapped single-walled carbon nanotubes (SWNTs) are studied from low to room temperature. Atomic force microscopy reveals a regularly patterned geometry of ssDNA molecules on the surface of SWNTs. Our measurements indicate that the semiconducting behavior of SWNTs is drastically changed after ssDNA modification, showing a clear charge-transfer process at room temperature. At low temperatures single-electron tunneling features are observed up to 80 K, demonstrating clearly that quantum dots in series are created in the SWNTs due to the ssDNA wrapping.
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页数：3
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