This paper presents a new immobilization method for Vapochromic Coordination Polymers (VCPs) for micromachined fluorescence chemical sensors. The method involves creating a sheet of post arrays in polydimethylsiloxane (PDMS) to trap and adhere the VCPs to the sensing surface. The method is simple, robust, and employs inexpensive micro-molding of PDMS polymer. Results suggest that, compared to un-patterned (flat) PDMS surfaces: 1) the VCPs on the patterned surfaces can detect ammonia gas without rendering the VCP inert (unable to fluoresce) or inaccessible; and 2) the technique has improved immobilization (attachment of VCP). We show that as the shapes of the top of the post arrays are changed from simple to mushroom-shaped caps, the sensitivity of the sensing surface is increased. Ammonia detection in the range of 5 ppm is possible with the most pronounced mushroom-shaped posts.

中文翻译：

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用于固定化学传感器的汽色配位聚合物的柱阵列

本文提出了一种用于微机械荧光化学传感器的气相变色配位聚合物 (VCP) 的新固定方法。该方法包括在聚二甲基硅氧烷 (PDMS) 中创建一张柱阵列，以捕获 VCP 并将其粘附到传感表面。该方法简单、稳健，并且采用廉价的 PDMS 聚合物微成型。结果表明，与未图案化（平坦）的 PDMS 表面相比：1）图案化表面上的 VCP 可以检测氨气，而不会使 VCP 呈惰性（无法发出荧光）或无法接近；2) 该技术改进了固定（VCP 的附着）。我们表明，随着柱阵列顶部的形状从简单的帽状变为蘑菇状的帽状，传感表面的灵敏度增加。