Kelvin Probe Force Microscopy of Single-walled Carbon Nanotubes Modified with DNA or Poly(ethylene glycol)

被引：18

作者：

Hayashida, Takuya ^{[1
]}

Kawashima, Takuya ^{[1
]}

Nii, Daisuke ^{[1
]}

Ozasa, Kazunari ^{[2
]}

Umemura, Kazuo ^{[1
]}

机构：

[1] Tokyo Univ Sci, Dept Phys, Fac Sci Div 2, Shinjuku Ku, Tokyo 1628601, Japan

[2] RIKEN, Bioengn Lab, Wako, Saitama 3510198, Japan

来源：

CHEMISTRY LETTERS | 2013年 / 42卷 / 06期

基金：

日本学术振兴会;

关键词：

DOUBLE-STRANDED DNA; SURFACE; WATER; HYBRIDS;

D O I：

10.1246/cl.130121

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Kelvin probe force microscopy (KPFM) of DNA-single-walled carbon nanotube (SWNT) hybrids was performed for the first time. KPFM images indicated that the hybrids had a negative surface potential relative to a Au-Pd alloy surface. In contrast, the surface potential of SWNTs modified with poly(ethylene glycol) (PEG SWNTs) was positive even after they were wrapped by DNA. Modification with covalent bonding may have a significant effect on the potential. The results suggest a possible way to distinguish variously modified SWNTs through KPFM observation.

引用

页码：666 / 668

页数：3

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