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- Title
DNA Origami Directed Assembly of Gold Bowtie Nanoantennas for Single‐Molecule Surface‐Enhanced Raman Scattering.
- Authors
Zhan, Pengfei; Wang, Zhen‐gang; Shi, Jia; Wang, Ting; Liu, Xinfeng; Ding, Baoquan; Wen, Te; He, Yingbo; Lu, Guowei
- Abstract
Abstract: Metallic bowtie nanoarchitectures can produce dramatic electric field enhancement, which is advantageous in single‐molecule analysis and optical information processing. Plasmonic bowtie nanostructures were successfully constructed using a DNA origami‐based bottom‐up assembly strategy, which enables precise control over the geometrical configuration of the bowtie with an approximate 5 nm gap. A single Raman probe was accurately positioned at the gap of the bowtie. Single‐molecule surface‐enhanced Raman scattering (SM‐SERS) of individual nanostructures, including ones containing an alkyne group, was observed. The design achieved repeatable local field enhancement of several orders of magnitude. This method opens the door on a novel strategy for the fabrication of metal bowtie structures and SM‐SERS, which can be utilized in the design of highly‐sensitive photonic devices.
- Subjects
SERS spectroscopy; DNA folding; OPTICAL antennas; ELECTROMAGNETIC fields; CHEMICAL detectors; PHOTODETECTORS; NONLINEAR optics
- Publication
Angewandte Chemie, 2018, Vol 130, Issue 11, p2896
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201712749