Hybrid Structures for Surface-Enhanced Raman Scattering: DNA Origami/Gold Nanoparticle Dimer/Graphene.
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.
Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14469, Potsdam, Germany.
Julia
J
Prinz
Center for Solid State Physics and New Materials, Institute of Physics, University of Belgrade, Pregrevica 118, 11080, Belgrade, Serbia.
Aleksandar
A
Matković
Center for Solid State Physics and New Materials, Institute of Physics, University of Belgrade, Pregrevica 118, 11080, Belgrade, Serbia.
Jelena
J
Pešić
Center for Solid State Physics and New Materials, Institute of Physics, University of Belgrade, Pregrevica 118, 11080, Belgrade, Serbia.
Radoš
R
Gajić
Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14469, Potsdam, Germany. bald@uni-potsdam.de.|BAM Federal Institute for Materials Research and Testing, Richard-Willstätter Str. 11, 12489, Berlin, Germany. bald@uni-potsdam.de.
Ilko
I
Bald
D004396:Coloring Agents / Q000737:chemistry; D004247:DNA / Q000737:chemistry*; D019281:Dimerization; D006046:Gold / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D018625:Microscopy, Atomic Force; D038761:Photobleaching; D013059:Spectrum Analysis, Raman / Q000379:methods*
D004396:Coloring Agents; D006046:Gold; D006108:Graphite; D004247:DNA
DNA origami; SERS; gold nanoparticles; graphene; photobleaching