Large surface enhanced Raman scattering enhancements from fracture surfaces of nanoporous gold

L. H. Qian; A. Inoue; M. W. Chen

doi:10.1063/1.2890164

Large surface enhanced Raman scattering enhancements from fracture surfaces of nanoporous gold

L. H. Qian, A. Inoue, M. W. Chen

Research output: Contribution to journal › Article › peer-review

46 Citations (Scopus)

Abstract

We report the improved surface enhanced Raman scattering (SERS) of mechanically ruptured nanoporous gold. The SERS intensities of rhodamine 6G and crystal violet 10B molecules from the fracture surfaces of nanoporous gold are about one order of magnitude higher than those from the as-prepared samples. Microstructural characterization reveals that the fracture surfaces contain numerous sharp protrusions with 5-10 nm apexes, produced by localized plastic deformation of gold ligaments during failure. The large SERS enhancements from the fracture surfaces are most likely associated with the intensified electromagnetic fields around the nanosized protrusions and the electromagnetic interaction between the protrusions.

Original language	English
Article number	093113
Journal	Applied Physics Letters
Volume	92
Issue number	9
DOIs	https://doi.org/10.1063/1.2890164
Publication status	Published - 2008 Mar 14

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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AB - We report the improved surface enhanced Raman scattering (SERS) of mechanically ruptured nanoporous gold. The SERS intensities of rhodamine 6G and crystal violet 10B molecules from the fracture surfaces of nanoporous gold are about one order of magnitude higher than those from the as-prepared samples. Microstructural characterization reveals that the fracture surfaces contain numerous sharp protrusions with 5-10 nm apexes, produced by localized plastic deformation of gold ligaments during failure. The large SERS enhancements from the fracture surfaces are most likely associated with the intensified electromagnetic fields around the nanosized protrusions and the electromagnetic interaction between the protrusions.

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