High performance and reusable SERS substrates using Ag/ZnO heterostructure on periodic silicon nanotube substrate
Journal
Applied Surface Science
Journal Volume
439
Pages
852-858
Date Issued
2018
Author(s)
Abstract
Surface-enhanced Raman scattering (SERS) substrate with a higher surface area, enhanced light harvesting, multiple hot spots and strong electromagnetic field enhancements would exhibit enhanced Raman signals. Herein, the Ag nanoparticle/ZnO nanowire heterostructure decorated periodic silicon nanotube (Ag@ZnO@SiNT) substrate was proposed and fabricated. The proposed structure employed as SERS-active substrate was examined, and the results showed both the high performance in terms of high sensitivity and good reproducibility. Furthermore, the Ag@ZnO@SiNT substrate demonstrated the self-cleaning performance through the photocatalytic degradation of probed molecules upon UV-irradiation. The results showed that the proposed nanostructure had high performance, good reproducibility and reusability, and it is a promising SERS-active substrate for molecular sensing and cleaning. ? 2018 Elsevier B.V.
Subjects
Atomic layer deposition
Photocatalyst
Silicon nanotubes
Surface-enhanced Raman scattering
Textured substrate
ZnO nanowires
Type
journal article