Raman Enhancement of Nanoparticle Dimers Self-Assembled Using DNA Origami Nanotriangles.

ABSTRACT: Surface-enhanced Raman scattering is a powerful approach to detect molecules at very low concentrations, even up to the single-molecule level. One important aspect of the materials used in such a technique is how much the signal is intensified, quantified by the enhancement factor (EF). Herein we obtained the EFs for gold nanoparticle dimers of 60 and 80 nm diameter, respectively, self-assembled using DNA origami nanotriangles. Cy5 and TAMRA were used as surface-enhanced Raman scattering (SERS) probes, which enable the observation of individual nanoparticles and dimers. EF distributions are determined at four distinct wavelengths based on the measurements of around 1000 individual dimer structures. The obtained results show that the EFs for the dimeric assemblies follow a log-normal distri

SUBMITTER: Kogikoski S 

PROVIDER: S-EPMC8002687 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature