Using the nanoimprint-in-metal method to prepare corrugated metal structures for plasmonic biosensors through both surface plasmon resonance and index-matching effects

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• 作者：Chen-Chieh Yu ; Kuan-Hung Ho ; Hsuen-Li Chen ; ^{hsuenlichen@ntu.edu.tw} ; Shang-Yu Chuang ; Shao-Chin Tseng ; Wei-Fang Su
• 关键词：Nanoimprint-in-metal ; Corrugated metal structure ; Biosensor ; Surface plasmon resonance ; Index-matching effect
• 刊名：Biosensors and Bioelectronics
• 出版年：2012
• 出版时间：15 March, 2012
• 年：2012
• 卷：33
• 期：1
• 页码：267-273
• 全文大小：955 K

文摘

In this study, we prepared metallic corrugated structures for use as highly sensitive plasmonic sensors. Relying on the direct nanoimprint-in-metal method, fabrication of this metallic corrugated structure was readily achieved in a single step. The metallic corrugated structures were capable of sensing both surface plasmon resonance (SPR) wavelengths and index-matching effects. The corrugated Au films exhibited high sensitivity (ca. 800 nm/RIU), comparable with or even higher than those of other reported SPR-based sensors. Because of the unique index-matching effect, refractometric sensing could also be performed by measuring the transmission intensity of the Au/substrate SPR mode¡ªconveniently, without a spectrometer. In the last, we demonstrated the corrugated Au film was capable of sensing biomolecules, revealing the ability of the structure to be a highly sensitive biosensor.