Quenching of Single-Walled Carbon Nanotube Fluorescence by Dissolved Oxygen Reveals Selective Single-Stranded DNA Affinities

被引：40

作者：

Zheng, Yu ^{[1
,2
]}

Bachilo, Sergei M. ^{[1
,2
]}

Weisman, R. Bruce ^{[1
,2
,3
]}

机构：

[1] Rice Univ, Dept Chem, 6100 Main St, Houston, TX 77005 USA

[2] Rice Univ, Smalley Curl Inst, 6100 Main St, Houston, TX 77005 USA

[3] Rice Univ, Dept Mat Sci & NanoEngn, 6100 Main St, Houston, TX 77005 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2017年 / 8卷 / 09期

基金：

美国国家科学基金会;

关键词：

SURFACTANTS;

D O I：

10.1021/acs.jpclett.7b00583

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The selective interactions between short oligomers of single-stranded DNA (ssDNA) and specific structures of single-walled carbon nanotubes have been exploited in powerful methods for nanotube sorting. We report here that nanotubes coated with ssDNA also display selective interactions through the selective quenching of nanotube fluorescence by dissolved oxygen. In aqueous solutions equilibrated under I atm of O-2, emission intensity from semiconducting nanotubes is reduced by between 9 and 40%, varying with the combination of ssDNA sequence and nanotube structure. This quenching reverses promptly and completely on the removal of dissolved 02 and may be due to physisorption on nanotube surfaces. Fluorescence quenching offers a simple, nondestructive approach for studying the structure-selective interactions of ssDNA with single walled carbon nanotubes and identifying recognition sequences.

引用

页码：1952 / 1955

页数：4

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