Aluminum Nanoarrays for Plasmon-Enhanced Light Harvesting
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- 作者：Minah Lee ; Jong Uk Kim ; Ki Joong Lee ; SooHoon Ahn ; Yong-Beom Shin ; Jonghwa Shin ; Chan Beum Park
- 刊名：ACS Nano
- 出版年：2015
- 出版时间：June 23, 2015
- 年：2015
- 卷：9
- 期：6
- 页码：6206-6213
- 全文大小：577K
- ISSN：1936-086X
文摘
The practical limits of coinage-metal-based plasmonic materials demand sustainable, abundant alternatives with a wide plasmonic range of the solar energy spectrum. Aluminum (Al) is an emerging alternative, but its instability in aqueous environments critically limits its applicability to various light-harvesting systems. Here, we report a design strategy to achieve a robust platform for plasmon-enhanced light harvesting using Al nanostructures. The incorporation of mussel-inspired polydopamine nanolayers in the Al nanoarrays allowed for the reliable use of Al plasmonic resonances in a highly corrosive photocatalytic redox solution and provided nanoscale arrangement of organic photosensitizers on Al surfaces. The Al鈥損hotosensitizer core鈥搒hell assemblies exhibited plasmon-enhanced light absorption, which resulted in a 300% efficiency increase in photo-to-chemical conversion. Our strategy enables stable and advanced use of aluminum for plasmonic light harvesting.