Publication: Self-depositing passivation layer investigations on stability improvement of the Ag NRs SERS substrate
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Issued Date
2022
Resource Type
Language
eng
File Type
application/pdf
ISSN
0042207X
Rights Holder(s)
Scopus
Bibliographic Citation
Vacuum. Vol 196, No. (2022)
Suggested Citation
Limwichean S., Nakajima H., Lertvanithphol T., Seawsakul K., Chananonnawathorn C., Botta R., Eiamchai P., Patthanasettakul V., Chindaudom P., Klamchuen A., Nuntawong N., Songsiriritthigul P., Horprathum M. Self-depositing passivation layer investigations on stability improvement of the Ag NRs SERS substrate. Vacuum. Vol 196, No. (2022). doi:10.1016/j.vacuum.2021.110734 Retrieved from: https://hdl.handle.net/20.500.14740/10249
Abstract
In this work, the origin of long-term stability in the silver nanorods (Ag NRs) feasible for surface-enhanced Raman spectroscopy (SERS) substrate was investigated. The Ag NRs films were deposited on silicon wafer substrates by magnetron sputtering with the glancing-angle deposition (GLAD) technique. It was found that the background contamination in the SERS spectra was suppressed by storing the as-deposited Ag NRs samples under the high vacuum condition after the deposition. Furthermore, the SERS response remained stable in an air ambient usage despite a slight decrease in the Raman signal. The stored Ag NRs under high vacuum exhibited long-term SERS stability over three months. X-ray photoemission spectroscopy revealed that the carbon was accumulated on the Ag NRs film surface after the high vacuum storage, and it prolonged the SERS performance. © 2021 Elsevier Ltd