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  • DNA Origami Directed Assemb...
    Zhan, Pengfei; Wen, Te; Wang, Zhen‐gang; He, Yingbo; Shi, Jia; Wang, Ting; Liu, Xinfeng; Lu, Guowei; Ding, Baoquan

    Angewandte Chemie International Edition, March 5, 2018, Letnik: 57, Številka: 11
    Journal Article

    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. Plasmonic bowtie nanostructures were successfully constructed using DNA origami‐based self‐assembly. A single Raman probe was accurately positioned at the gap of the bowtie and single‐molecule SERS of individual nanostructures was observed.