Design of tunable ultraviolet (UV) absorbance by controlling the AgAl co-sputtering deposition.

Author(s) Zhang, X.Y.; Chen, L.; Wang, Y.; Zhang, Y.; Yang, J.; Choi, H.Chul; Jung, Y.Mee
Journal Spectrochim Acta A Mol Biomol Spectrosc
Date Published 2018 May 15

Changing the structure and composition of a material can alter its properties; hence, the controlled fabrication of metal nanostructures plays a key role in a wide range of applications. In this study, the structure of AgAl ordered arrays fabricated by co-sputtering deposition onto a monolayer colloidal crystal significantly increased its ultraviolet (UV) absorbance owing to a tunable localized surface plasmon resonance (LSPR) effect. By increasing the spacing between two nanospheres and the content of aluminum, absorbance in the UV region could be changed from UVA (320-400nm) to UVC (200-275nm), and the LSPR peak in the visible region gradually shifted to the UV region. This provides the potential for surface-enhanced Raman scattering (SERS) in both the UV and visible regions.

DOI 10.1016/j.saa.2017.12.056
ISSN 1873-3557
Citation Spectrochim Acta A Mol Biomol Spectrosc. 2018;197:3742.

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