期刊
APPLIED SPECTROSCOPY
卷 65, 期 4, 页码 417-422出版社
SOC APPLIED SPECTROSCOPY
DOI: 10.1366/10-05930
关键词
Surface-enhanced Raman scattering; SERS; Atomic layer deposition; Reusable substrates
资金
- Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy
- Division of Scientific User Facilities, U.S. Department of Energy
A thermally stable, reusable surface-enhanced Raman scattering (SERS) substrate consisting of a gold/silver hi-layer film with a protective alumina coating is reported. The film is synthesized by thermally evaporating sequential layers of gold and silver followed by coating an ultra-thin alumina layer using atomic layer deposition. The use of gold as the foundational layer improves the thermal stability of the metal bi-layer film while providing the additional ability to tune the SERS response. Deposition of the thin alumina overlayer on the hi-layer film creates a SERS substrate capable of enduring multiple high-temperature exposures to 400 degrees C with minimal loss of enhancement capabilities. We demonstrate the multi-use capability of the substrate by measuring the SERS spectrum of rhodamine 6G followed by a thermal treatment at 400 degrees C to remove the analyte. A representative substrate was used to acquire SERS spectra of rhodamine 6G up to live repeat measurements, thus establishing the reusability of this relatively simple, inexpensive, and stable substrate.
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