Hybrid Structures for Surface‐Enhanced Raman Scattering: DNA Origami/Gold Nanoparticle Dimer/Graphene. Issue 39 (4th September 2016)

• Record Type: Journal Article
• Authors: Prinz, Julia; Matković, Aleksandar; Pešić, Jelena; Gajić, Radoš; Bald, Ilko
• Is Part Of: Small. Volume 12:Issue 39(2016)
• Page Start: 5458
• Page End: 5467
• Publication Date: 2016-09-04
• Subjects: DNA origami -- gold nanoparticles -- graphene -- photobleaching -- SERS; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201601908
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract : A combination of three innovative materials within one hybrid structure to explore the synergistic interaction of their individual properties is presented. The unique electronic, mechanical, and thermal properties of graphene are combined with the plasmonic properties of gold nanoparticle (AuNP) dimers, which are assembled using DNA origami nanostructures. This novel hybrid structure is characterized by means of correlated atomic force microscopy and surface‐enhanced Raman scattering (SERS). It is demonstrated that strong interactions between graphene and AuNPs result in superior SERS performance of the hybrid structure compared to their individual components. This is particularly evident in efficient fluorescence quenching, reduced background, and a decrease of the photobleaching rate up to one order of magnitude. The versatility of DNA origami structures to serve as interface for complex and precise arrangements of nanoparticles and other functional entities provides the basis to further exploit the potential of the here presented DNA origami–AuNP dimer–graphene hybrid structures. Abstract : Hybrid structures based on DNA origami, gold nanoparticles, and single‐layer graphene exhibit beneficial properties that can be exploited in surface‐enhanced Raman scattering. Extensive interactions between the individual building blocks lead to efficient quenching of fluorescence arising from incorporated dye molecules and at the same time increase their photostability toward prolonged laser exposure.