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Multilayer enhanced gold film over nanostructure surface-enhanced Raman substrates.
Appl Spectrosc. 2006 Dec; 60(12):1377-85.AS

Abstract

We have developed a novel class of gold multilayer, surface-enhanced Raman scattering (SERS) substrates that are capable of enhancing SERS signals by 15.3-fold over conventional gold film over nanostructure (GFON) SERS substrates, making them comparable in sensitivity to optimized silver film over nanostructure (SFON) substrates, while providing the long-term stability obtained from gold. They are fabricated by depositing 10 A thick silver oxide islands on conventional GFON substrates, followed by deposition of a second continuous gold layer. The silver oxide layer acts as a dielectric spacer between the two continuous gold films and produces significantly enhanced SERS signals, as compared to optimized single layer substrates of the same geometry or comparable substrates prepared by deposition of silver islands that are not oxidized. In addition to the enhanced sensitivity of these multilayer substrates, they also exhibit long SERS active shelf-lives (i.e., months), with no measurable degradation in SERS enhancement, and relative standard deviations in SERS enhancement of less than 5.2% across the substrate's surface.

Authors+Show Affiliations

Department of Chemistry and Biochemistry, University of Maryland Baltimore County, 1000 Hilltop Circle, Baltimore, Maryland 21250, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

17217586

Citation

Li, Honggang, et al. "Multilayer Enhanced Gold Film Over Nanostructure Surface-enhanced Raman Substrates." Applied Spectroscopy, vol. 60, no. 12, 2006, pp. 1377-85.
Li H, Baum CE, Sun J, et al. Multilayer enhanced gold film over nanostructure surface-enhanced Raman substrates. Appl Spectrosc. 2006;60(12):1377-85.
Li, H., Baum, C. E., Sun, J., & Cullum, B. M. (2006). Multilayer enhanced gold film over nanostructure surface-enhanced Raman substrates. Applied Spectroscopy, 60(12), 1377-85.
Li H, et al. Multilayer Enhanced Gold Film Over Nanostructure Surface-enhanced Raman Substrates. Appl Spectrosc. 2006;60(12):1377-85. PubMed PMID: 17217586.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multilayer enhanced gold film over nanostructure surface-enhanced Raman substrates. AU - Li,Honggang, AU - Baum,Caitlin E, AU - Sun,Jian, AU - Cullum,Brian M, PY - 2007/1/16/pubmed PY - 2007/2/8/medline PY - 2007/1/16/entrez SP - 1377 EP - 85 JF - Applied spectroscopy JO - Appl Spectrosc VL - 60 IS - 12 N2 - We have developed a novel class of gold multilayer, surface-enhanced Raman scattering (SERS) substrates that are capable of enhancing SERS signals by 15.3-fold over conventional gold film over nanostructure (GFON) SERS substrates, making them comparable in sensitivity to optimized silver film over nanostructure (SFON) substrates, while providing the long-term stability obtained from gold. They are fabricated by depositing 10 A thick silver oxide islands on conventional GFON substrates, followed by deposition of a second continuous gold layer. The silver oxide layer acts as a dielectric spacer between the two continuous gold films and produces significantly enhanced SERS signals, as compared to optimized single layer substrates of the same geometry or comparable substrates prepared by deposition of silver islands that are not oxidized. In addition to the enhanced sensitivity of these multilayer substrates, they also exhibit long SERS active shelf-lives (i.e., months), with no measurable degradation in SERS enhancement, and relative standard deviations in SERS enhancement of less than 5.2% across the substrate's surface. SN - 0003-7028 UR - https://www.unboundmedicine.com/medline/citation/17217586/Multilayer_enhanced_gold_film_over_nanostructure_surface_enhanced_Raman_substrates_ L2 - https://journals.sagepub.com/doi/10.1366/000370206779321562?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -