2-D Array Photonic Crystal Sensing Motif

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• 作者：Jian-Tao Zhang ; Luling Wang ; Jia Luo ; Alexander Tikhonov ; Nikolay Kornienko ; Sanford A. Asher
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：June 22, 2011
• 年：2011
• 卷：133
• 期：24
• 页码：9152-9155
• 全文大小：755K
• 年卷期：v.133,no.24(June 22, 2011)
• ISSN：1520-5126

文摘

We have developed the first high-diffraction-efficiency two-dimensional (2-D) photonic crystals for molecular recognition and chemical sensing applications. We prepared close-packed 2-D polystyrene particle arrays by self-assembly of spreading particle monolayers on mercury surfaces. The 2-D particle arrays amazingly diffract 80% of the incident light. When a 2-D array was transferred onto a hydrogel thin film showing a hydrogel volume change in response to a specific analyte, the array spacing was altered, shifting the 2-D array diffraction wavelength. These 2-D array photonic crystals exhibit ultrahigh diffraction efficiencies that enable them to be used for visual determination of analyte concentrations.