journal article·2020-05Open access

Engineering Colloidal Lithography and Nanoskiving to Fabricate Rows of Opposing Crescent Nanogaps

Panpan Gu, Wei Zhang, Zhiyuan Zhao, Bin Ai, Tianxing Zheng, Ryan C. Chiechi, Chunguang Li, Zhan Shi, Gang Zhang

Advanced Optical Materials· Volume 8· Issue 10

Abstract

Abstract A scalable fabrication route combining colloidal lithography and nanoskiving is reported for generating free‐standing asymmetric metal nanostructures of crescent‐shaped gold nanowires and rows of opposing crescents with and without nanogaps. Strong localized surface plasmon resonances and propagating surface plasmon polaritons are excited at the sharp tips of the crescent and in the sub‐10 nm nanogaps. High‐order resonance modes are excited due to the coupling between the resonances in the tips and gaps. The Raman signals are greatly enhanced due to the strong electric fields. In addition, the optical responses and electric field distributions can be controlled by the polarization of the incident light. The strong electric field enhancement coupled with facile, scalable fabrication make crescent‐shaped nanostructures promising in nonlinear optics, optical trapping, and surface‐enhanced spectroscopy.
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Research context

OpenAlex topics: Plasmonic and Surface Plasmon Research · Gold and Silver Nanoparticles Synthesis and Applications · Orbital Angular Momentum in Optics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Lab of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 P.R. China

Present address: College of Chemical Engineering and Machinery Eastern Liaoning University Dandong 118003 P. R. China

Institute of New Energy on Chemical Storage and Power Sources College of Applied Chemistry and Environmental Engineering Yancheng Teachers University Yancheng 224002 P. R. China

School of Microelectronics and Communication Engineering Chongqing Key Laboratory of Bio‐perception and Intelligent Information Processing Chongqing University Chongqing 400044 P. R. China

Stratingh Institute for Chemistry, and Zernike Institute for Advanced Materials University of Groningen Nijenborgh 4 Groningen AG 9747 The Netherlands

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University Changchun 130012 P. R. China

Funding

National Natural Science Foundation of China

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