Cavity-Type DNA Origami-Based Plasmonic Nanostructures for Raman Enhancement

被引：18

作者：

Zhao, Mengzhen ^{[1
]}

Wang, Xu ^{[1
]}

Ren, Shaokang ^{[1
]}

Xing, Yikang ^{[1
]}

Wang, Jun ^{[1
]}

Teng, Nan ^{[1
]}

Zhao, Dongxia ^{[1
]}

Liu, Wei ^{[1
]}

Zhu, Dan ^{[1
]}

Su, Shao ^{[1
]}

Sho, Jiye ^{[4
]}

Song, Shiping ^{[2
,3
]}

Wang, Lihua ^{[2
,3
]}

Chao, Jie ^{[1
]}

Wang, Lianhui ^{[1
]}

机构：

[1] Nanjing Univ Posts & Telecommun, KLOEID, IAM, Natl Syngerst Innovat Ctr Adv Mat SICAM, 9 Wenyuan Rd, Nanjing 210023, Jiangsu, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Div Phys Biol, Shanghai 201800, Peoples R China

[3] Chinese Acad Sci, CAS Key Lab Interfacial Phys & Technol, Shanghai Synchrotron Radiat Facil, Bioimaging Ctr,Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[4] UCB Pharma, 208 Bath Rd, Slough SL1 3WE, Berks, England

来源：

ACS APPLIED MATERIALS & INTERFACES | 2017年 / 9卷 / 26期

基金：

中国国家自然科学基金;

关键词：

DNA self-assembly; cavity-type DNA origami; plasmonic nanostructures; gold nanoparticles; SERS; GOLD NANOPARTICLES; NANOARCHITECTURES; DISCRETE; ARRAYS; SENSOR; SERS;

D O I：

10.1021/acsami.7b05959

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

DNA origami has been established as addressable templates for site-specific anchoring of gold nanoparticles (AuNPs). Given that AuNPs are assembled by charged DNA oligonucleotides, it is important to reduce the charge repulsion between AuNPs-DNA and the template to realize high yields. Herein, we developed a cavity-type DNA origami as templates to organize 30 nm AuNPs, which formed dimer and tetramer plasmonic nanostructures. Transmission electron microscopy images showed that high yields of dimer and tetramer plasmonic nanostructures were obtained by using the cavity-type DNA origami as the template. More importantly, we observed significant Raman signal enhancement from molecules covalently attached to the plasmonic nanostructures, which provides a new way to high-sensitivity Raman sensing.

引用

页码：21942 / 21948

页数：7

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