Deterministic assembly of single optical cavity formed by gold dimensional DNA origami

查看全文 作　　者：Zhi [1,3,4]Zhao;Xiahui [3]Chen;Jiawei [3]Zuo;Ali [3]Basiri;Shinhyuk [3]Choi;Yu [3]Yao;Yan [1,2]Liu;Chao [1,3]Wang

机构地区：[1]Center for Molecular Design and Biomimetics at the Biodesign Institute,Arizona State University,Tempe,Arizona 85287,USA;[2]School of Molecular Sciences,Arizona State University,Tempe,AZ 85287,USA;[3]School of Electrical,Computer and Energy Engineering,Arizona State University,Tempe,AZ 85287,USA;[4]Faculty of Materials and Manufacturing,Key Laboratory of Advanced Functional Materials,Education Ministry of China,Beijing University of Technology,Beijing 100124,China

出　　处：《Nano Research》索引2022年第15卷第2期,共11页

基　　金：support from an Army Research Office MURI award no.W91 INF-12-1-0420;C.W.thanks the ASU startup funds and National Science Foundation under grant Nos.1711412,1838443,and 1847324 for partially supporting this research;Y.Y.thanks the ASU startup funds and National Science Foundation under grant Nos.1809997 for partially supporting this research. 摘　　要：Controllable strong interactions between a nanocavity and a single emitter is important to manipulating optical emission in a nanophotonic system but challenging to achieve.Herein a three-dimensional DNA origami,named as DNA rack(DR)is proposed and demonstrated to deterministically and precisely assemble single emitters within ultra-small plasmonic nanocavities formed by closely coupled gold nanorods(AuNRs).Uniquely,the DR is in a saddle shape,with two tubular grooves that geometrically allow a snug fit and linearly align two AuNRs with a bending angle <10°.It also includes a spacer at the saddle point to maintain the gap between AuNRs as small as 2-3 nm,forming a nanocavity estimated to be 20 nm^(3) and an experimentally measured O factor of 7.3.A DNA docking strand is designed at the spacer to position a single fluorescent emitter at nanometer accuracy within the cavity.Using Cy5 as a model emitter,a -30-fold fluorescence enhancement and a significantly reduced emission lifetime(from 1.6 ns to 670 ps)were experimentally verified,confirming significant emitter-cavity interactions.This DR-templated assembly method is capable of fitting AuNRs of variable length-to-width aspect ratios to form anisotropic nanocavities and deterministically incorporate different single emitters,thus enabling flexible design of both cavity resonance and emission wavelengths to tailor light-matter interactions at nanometer scale. 关键词：DNA origami self-assembly deterministic single emitter plasmonic nanocavity nanorod dimer optical coupling

相关文献

参考文献（54）
引证文献（1）
耦合文献（0）

参考文献(54)

引证文献(1)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Deterministic assembly of single optical cavity formed by gold dimensional DNA origami

参考文献(54)

引证文献(1)

用户提示