Chirality-Selective Photoluminescence Enhancement of ssDNA-Wrapped Single-Walled Carbon Nanotubes Modified with Gold Nanoparticles

被引：13

作者：

Yang, Juan ^{[1
]}

Zhao, Qinghua ^{[1
]}

Lyu, Min ^{[1
]}

Zhang, Zhenyu ^{[1
]}

Wang, Xiao ^{[1
]}

Wang, Meng ^{[1
]}

Gao, Zhou ^{[1
]}

Li, Yan ^{[1
]}

机构：

[1] Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, Key Lab Phys & Chem Nanodevices,State Key Lab Rar, Beijing 100871, Peoples R China

来源：

SMALL | 2016年 / 12卷 / 23期

关键词：

FLUORESCENCE; DNA; RECOGNITION; SEQUENCE; DISPERSION; SEPARATION; BINDING;

D O I：

10.1002/smll.201503883

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work, a convenient method to enhance the photoluminescence (PL) of single-walled carbon nanotubes (SWNTs) in aqueous solutions is provided. Dispersing by single-stranded DNA (ssDNA) and modifying with gold nanoparticles (AuNPs), about tenfold PL enhancement of the SWNTs is observed. More importantly, the selective PL enhancement is achieved for some particular chiralities of interest over all other chiralities, by using certain specific ssDNA sequences that are reported to recognize these particular chiralities. By forming AuNP-DNA-SWNT nanohybrids, ssDNA serves as superior molecular spacers that on one hand protect SWNT from direct contacting with AuNP and causing PL quench, and on the other hand attract the AuNP in close proximity to the SWNT to enhance its PL. This PL enhancement method can be utilized for the PL analysis of SWNTs in aqueous solutions, for biomedical imaging, and may serve as a prescreening method for the recognition and separation of single chirality SWNTs by ssDNA.

引用

页码：3164 / 3171

页数：8

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