Single-Step Organization of Plasmonic Gold Metamaterials with Self-Assembled DNA Nanostructures

Shaokang Ren,Chunyuan Song,Wei Huang,Lianhui Wang,Yanjun Yang,Jun Wang,Dan Zhu,Qian Li,Chunhai Fan,Jie Chao,Nan Teng,Shao Su

doi:10.34133/2019/7403580

Abstract

Self-assembled DNA nanostructures hold great promise as nanoscale templates for organizing nanoparticles (NPs) with near-atomistic resolution. However, large-scale organization of NPs with high yield is highly desirable for nanoelectronics and nanophotonic applications. Here, we design five-strand DNA tiles that can readily self-assemble into well-organized micrometer-scale DNA nanostructures. By organizing gold nanoparticles (AuNPs) on these self-assembled DNA nanostructures, we realize the fabrication of one- and two-dimensional Au nanostructures in single steps. We further demonstrate the one-pot synthesis of Au metamaterials for highly amplified surface-enhanced Raman Scattering (SERS). This single-step and high-yield strategy thus holds great potential for fabricating plasmonic metamaterials.

Highlights

IntroductionMultiple-dimensional gold (Au) nanostructures such as one-dimensional (1D) nanowires [1,2,3,4], two-dimensional (2D) nanolattice [5,6,7,8,9,10,11], and three-dimensional (3D) crystalline lattices [12, 13] have attracted intense attention because of their potential applications in nanoelectronics [14], nanophotonics [4, 10, 15, 16], and nanosensors [17, 18]
During the past two decades, numerous DNA nanostructures with various shapes in multiple dimensions were fabricated with one-pot assembly [23,24,25]
With the optimization of sequences for N1, N2, N3, S1, and S2 by SEQUIN [37], we surprisingly found that five DNA strands can self-assemble into ribbon-like DNA origami nanostructures (RDNs) in 20 minutes at room temperature in 1×TAE/Mg2+ buffer

Summary

Introduction

Multiple-dimensional gold (Au) nanostructures such as one-dimensional (1D) nanowires [1,2,3,4], two-dimensional (2D) nanolattice [5,6,7,8,9,10,11], and three-dimensional (3D) crystalline lattices [12, 13] have attracted intense attention because of their potential applications in nanoelectronics [14], nanophotonics [4, 10, 15, 16], and nanosensors [17, 18]. During the past two decades, numerous DNA nanostructures with various shapes in multiple dimensions were fabricated with one-pot assembly [23,24,25]. The typical procedure to create these AuNPs nanostructures usually contains two steps: assembly of DNA templates and organization of AuNPs, which would take several hours and even days [2, 9, 10]. These studies have mostly focused on studies of versatile strategies to fabricate complex plasmonic architectures with multiple functions or tailored optical response. We demonstrate the realization of plasmonic Au metamaterials through one-pot assembly of AuNPs with five DNA strands and investigate their optical applications

Methods

Results

Conclusion