Silver nanocrystal-modified silicon nanowires as substrates for surface-enhanced Raman and hyper-Raman scattering

Weinan Leng; Amir A. Yasseri; Shashank Sharma; Zhiyong Li; Han Young Woo; Doojin Vak; Guillermo C. Bazan; Anne Myers Kelley

doi:10.1021/ac060561u

Silver nanocrystal-modified silicon nanowires as substrates for surface-enhanced Raman and hyper-Raman scattering

Weinan Leng, Amir A. Yasseri, Shashank Sharma, Zhiyong Li, Han Young Woo, Doojin Vak, Guillermo C. Bazan, Anne Myers Kelley

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

43 Citations (Scopus)

Abstract

Metal catalyzed, CVD-grown silicon nanowires decorated by chemical assembly of closely spaced Ag nanocrystals were modified with the well-known "silver mirror" reaction and investigated as substrates for surface-enhanced Raman (SERS) and hyper-Raman (SEHRS) spectroscopy. Four chromophores were examined: Rhodamine 6G, crystal violet, a cyanine dye, and a cationic donor-acceptor substituted stilbene. After soaking the substrates overnight in 10^-4 M aqueous chromophore solutions, all four chromophores gave good-quality SERS spectra in ≤ 60 s using < 1 μW of 458-nm cw laser power, and SEHRS spectra are obtained in ≤ 120 s using < 1 mW of mode-locked 916-nm laser power. Results from this substrate are compared with those on colloidal silver nanoparticles deposited as a film, as well as surfaces grown by the silver mirror reaction.

Original language	English
Pages (from-to)	6279-6282
Number of pages	4
Journal	Analytical chemistry
Volume	78
Issue number	17
DOIs	https://doi.org/10.1021/ac060561u
Publication status	Published - 2006 Sept 1
Externally published	Yes

ASJC Scopus subject areas

Analytical Chemistry

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title = "Silver nanocrystal-modified silicon nanowires as substrates for surface-enhanced Raman and hyper-Raman scattering",

abstract = "Metal catalyzed, CVD-grown silicon nanowires decorated by chemical assembly of closely spaced Ag nanocrystals were modified with the well-known {"}silver mirror{"} reaction and investigated as substrates for surface-enhanced Raman (SERS) and hyper-Raman (SEHRS) spectroscopy. Four chromophores were examined: Rhodamine 6G, crystal violet, a cyanine dye, and a cationic donor-acceptor substituted stilbene. After soaking the substrates overnight in 10-4 M aqueous chromophore solutions, all four chromophores gave good-quality SERS spectra in ≤ 60 s using < 1 μW of 458-nm cw laser power, and SEHRS spectra are obtained in ≤ 120 s using < 1 mW of mode-locked 916-nm laser power. Results from this substrate are compared with those on colloidal silver nanoparticles deposited as a film, as well as surfaces grown by the silver mirror reaction.",

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AU - Leng, Weinan

AU - Yasseri, Amir A.

AU - Sharma, Shashank

AU - Li, Zhiyong

AU - Woo, Han Young

AU - Vak, Doojin

AU - Bazan, Guillermo C.

AU - Kelley, Anne Myers

PY - 2006/9/1

Y1 - 2006/9/1

N2 - Metal catalyzed, CVD-grown silicon nanowires decorated by chemical assembly of closely spaced Ag nanocrystals were modified with the well-known "silver mirror" reaction and investigated as substrates for surface-enhanced Raman (SERS) and hyper-Raman (SEHRS) spectroscopy. Four chromophores were examined: Rhodamine 6G, crystal violet, a cyanine dye, and a cationic donor-acceptor substituted stilbene. After soaking the substrates overnight in 10-4 M aqueous chromophore solutions, all four chromophores gave good-quality SERS spectra in ≤ 60 s using < 1 μW of 458-nm cw laser power, and SEHRS spectra are obtained in ≤ 120 s using < 1 mW of mode-locked 916-nm laser power. Results from this substrate are compared with those on colloidal silver nanoparticles deposited as a film, as well as surfaces grown by the silver mirror reaction.

AB - Metal catalyzed, CVD-grown silicon nanowires decorated by chemical assembly of closely spaced Ag nanocrystals were modified with the well-known "silver mirror" reaction and investigated as substrates for surface-enhanced Raman (SERS) and hyper-Raman (SEHRS) spectroscopy. Four chromophores were examined: Rhodamine 6G, crystal violet, a cyanine dye, and a cationic donor-acceptor substituted stilbene. After soaking the substrates overnight in 10-4 M aqueous chromophore solutions, all four chromophores gave good-quality SERS spectra in ≤ 60 s using < 1 μW of 458-nm cw laser power, and SEHRS spectra are obtained in ≤ 120 s using < 1 mW of mode-locked 916-nm laser power. Results from this substrate are compared with those on colloidal silver nanoparticles deposited as a film, as well as surfaces grown by the silver mirror reaction.

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Silver nanocrystal-modified silicon nanowires as substrates for surface-enhanced Raman and hyper-Raman scattering

Abstract

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