二维阵列光子晶体传感基元。

2-D array photonic crystal sensing motif.

机构信息

Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.

出版信息

J Am Chem Soc. 2011 Jun 22;133(24):9152-5. doi: 10.1021/ja201015c. Epub 2011 May 23.

DOI:10.1021/ja201015c

Abstract

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.

摘要

我们已经开发出了第一个用于分子识别和化学传感应用的高衍射效率二维（2-D）光子晶体。我们通过在汞表面上展开粒子单层的自组装制备了紧密堆积的 2-D 聚苯乙烯粒子阵列。该 2-D 粒子阵列令人惊讶地衍射了 80%的入射光。当一个 2-D 阵列被转移到一个水凝胶薄膜上时，该薄膜在响应特定分析物时会发生水凝胶体积变化，从而改变了 2-D 阵列的间距，改变了 2-D 阵列的衍射波长。这些 2-D 阵列光子晶体表现出超高的衍射效率，使它们能够用于可视化确定分析物浓度。