Wrinkled nanoporous gold films with ultrahigh surface-enhanced raman scattering enhancement

Ling Zhang; Xingyou Lang; Akihiko Hirata; Mingwei Chen

doi:10.1021/nn201443p

Wrinkled nanoporous gold films with ultrahigh surface-enhanced raman scattering enhancement

Ling Zhang, Xingyou Lang, Akihiko Hirata, Mingwei Chen^*

^*Corresponding author for this work

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

219 Citations (Scopus)

Abstract

Amplified by plasomonic nanostructured metals, Raman intensity of organic molecules and biomolecules can be dramatically improved, particularly at "hot spots" where intense electromagnetic fields are produced in the vicinity of narrow nanogaps between metallic nanostructures. Therefore, developing new substrates with a high density of "hot spots" has been the recent topic of intense study. Here we report wrinkled nanoporous gold films that contain abundant Raman-active nanogaps produced by deformation and fracture of nanowire-like gold ligaments. This novel nanostructure yields ultrahigh surface enhanced Raman scattering for molecule detection.

Original language	English
Pages (from-to)	4407-4413
Number of pages	7
Journal	ACS Nano
Volume	5
Issue number	6
DOIs	https://doi.org/10.1021/nn201443p
Publication status	Published - 2011 Jun 28
Externally published	Yes

Keywords

nanogaps
nanoporous gold (NPG)
surface-enhanced Raman scattering (SERS)
wrinkle

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)
Physics and Astronomy(all)

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10.1021/nn201443p

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AU - Zhang, Ling

AU - Lang, Xingyou

AU - Hirata, Akihiko

AU - Chen, Mingwei

PY - 2011/6/28

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N2 - Amplified by plasomonic nanostructured metals, Raman intensity of organic molecules and biomolecules can be dramatically improved, particularly at "hot spots" where intense electromagnetic fields are produced in the vicinity of narrow nanogaps between metallic nanostructures. Therefore, developing new substrates with a high density of "hot spots" has been the recent topic of intense study. Here we report wrinkled nanoporous gold films that contain abundant Raman-active nanogaps produced by deformation and fracture of nanowire-like gold ligaments. This novel nanostructure yields ultrahigh surface enhanced Raman scattering for molecule detection.

AB - Amplified by plasomonic nanostructured metals, Raman intensity of organic molecules and biomolecules can be dramatically improved, particularly at "hot spots" where intense electromagnetic fields are produced in the vicinity of narrow nanogaps between metallic nanostructures. Therefore, developing new substrates with a high density of "hot spots" has been the recent topic of intense study. Here we report wrinkled nanoporous gold films that contain abundant Raman-active nanogaps produced by deformation and fracture of nanowire-like gold ligaments. This novel nanostructure yields ultrahigh surface enhanced Raman scattering for molecule detection.

KW - nanogaps

KW - nanoporous gold (NPG)

KW - surface-enhanced Raman scattering (SERS)

KW - wrinkle

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Wrinkled nanoporous gold films with ultrahigh surface-enhanced raman scattering enhancement

Abstract

Keywords

ASJC Scopus subject areas

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