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Published on: April 1, 2013
Design of tunable ultraviolet (UV) absorbance by controlling the AgAl co-sputtering deposition
Xin-Yuan Zhang1, Lei Chen2, Yaxin Wang3
1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.
Abstract:
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.
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