Post Arrays for the Immobilization of Vapochromic Coordination Polymers for Chemical Sensors

被引：4

作者：

Stevens, David M. ^{[1
]}

Gray, Bonnie L. ^{[1
]}

Yin, Dawei ^{[2
]}

Chapman, Glenn H. ^{[2
]}

Leznoff, Daniel B. ^{[3
]}

机构：

[1] Simon Fraser Univ, Microinstrumentat Lab, Sch Engn Sci ENSC, Vancouver, BC V5A 1S6, Canada

[2] Simon Fraser Univ, Opt Lab, Sch Engn Sci ENSC, Vancouver, BC V5A 1S6, Canada

[3] Simon Fraser Univ, Dept Chem, Vancouver, BC V5A 1S6, Canada

来源：

IEEE SENSORS JOURNAL | 2020年 / 20卷 / 20期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Ammonia; Optical surface waves; Sensor arrays; Resists; Fluorescence; Optical sensors; Ammonia sensors; immobilization techniques; vapochromic coordination polymers; power transformers; PDMS;

D O I：

10.1109/JSEN.2020.3000178

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：12102 / 12108

页数：7

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