Metal Nanoparticle-Functionalized DNA Tweezers: From Mechanically Programmed Nanostructures to Switchable Fluorescence Properties

被引：50

作者：

Shimron, Simcha ^{[1
]}

Cecconello, Alessandro ^{[1
]}

Lu, Chun-Hua ^{[1
]}

Willner, Itamar ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Inst Chem, IL-91904 Jerusalem, Israel

来源：

NANO LETTERS | 2013年 / 13卷 / 08期

基金：

欧盟第七框架计划;

关键词：

fluorescence; nanoparticle; plasmon; DNA; switch; machine; NANOSCALE SHAPES; LOGIC GATES; FOLDING DNA; ARRAYS; CIRCUITS; WALKER; NANOWIRES; NANOTUBES; MOLECULE;

D O I：

10.1021/nl4017539

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

DNA tweezers are modified with two 10-nn sized Au NPs and one 5-nm sized Au NP. Upon treatment of the tweezers with fuel and antifuel nucleic acid strands, the switchable closure and opening of the tweezers proceed, leading to the control of programmed nanostructures of the tethered NPs. The tweezers are further modified with a single 10-nm sized nanoparticle, and a fluorophore unit (Cy3), positioned at different distinct sites of the tweezers. The reversible and cyclic fluorescence quenching or fluorescence enhancement phenomena, upon the dynamic opening/closure of the different tweezers, are demonstrated.

引用

页码：3791 / 3795

页数：5