具有自集成光学天线的石墨烯纳米孔。

Graphene nanopore with a self-integrated optical antenna.

机构信息

Department of Bioengineering, ‡Berkeley Sensor and Actuator Center, §Department of Physics, ⊥Center of Integrated Nanomechanical Systems, ∇Department of Electrical Engineering and Computer Sciences, and ■Biophysics Graduate Program, University of California , Berkeley, California 94720, United States.

出版信息

Nano Lett. 2014 Oct 8;14(10):5584-9. doi: 10.1021/nl503159d. Epub 2014 Sep 9.

DOI:10.1021/nl503159d

PMID:25203166

Abstract

We report graphene nanopores with integrated optical antennae. We demonstrate that a nanometer-sized heated spot created by photon-to-heat conversion of a gold nanorod resting on a graphene membrane forms a nanoscale pore with a self-integrated optical antenna in a single step. The distinct plasmonic traits of metal nanoparticles, which have a unique capability to concentrate light into nanoscale regions, yield the significant advantage of parallel nanopore fabrication compared to the conventional sequential process using an electron beam. Tunability of both the nanopore dimensions and the optical characteristics of plasmonic nanoantennae are further achieved. Finally, the key optical function of our self-integrated optical antenna on the vicinity of graphene nanopore is manifested by multifold fluorescent signal enhancement during DNA translocation.

摘要

我们报告了带有集成光学天线的石墨烯纳米孔。我们证明，在石墨烯膜上放置金纳米棒，通过光转换为热，在纳米尺度上形成一个热点，从而在单个步骤中形成一个带有自集成光学天线的纳米尺度孔。金属纳米粒子的独特等离子体特性使其具有将光聚焦到纳米区域的独特能力，与使用电子束的传统顺序工艺相比，这种特性为并行纳米孔制造带来了显著优势。此外，还实现了纳米孔尺寸和等离子体纳米天线光学特性的可调性。最后，通过 DNA 易位过程中荧光信号的多倍增强，证明了我们自集成光学天线在石墨烯纳米孔附近的关键光学功能。