Designing solid optical sensors for in situ passive discrimination of volatile amines based on a new one-step hydrophilic PDMS preparation

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• 作者：N. Jornet-Martí ; nezAuthor Vitae ; Y. Moliner-Martí ; nezAuthor Vitae ; R. Herrá ; ez-Herná ; ndezAuthor Vitae ; C. Molins-LeguaAuthor Vitae ; J. Verdú ; -André ; sAuthor Vitae ; P. Campí ; ns-Falcó ; ; ^{pilar.campins@uv.es" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Passive sampling ; PDMS ; TEOS ; Amines ; Optical sensor ; In situ control ; Discrimination
• 刊名：Sensors & Actuators: B. Chemical
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：223
• 期：Complete
• 页码：333-342
• 全文大小：1940 K

文摘

We reported an optimal material for embedding chemoresponsive dyes based on modified commercial PDMS. A new approach to impart hydrophilicity to H-PDMS in an unique step was developed by addition of tetraethyl orthosilicate (TEOS) and in absence of basic or acid aqueous mixtures or hydroxyl-compounds during the PDMS coating process. This incorporation significantly enhances the performance of PDMS-based devices for sensing applications. New colorimetric sensors for passive detection and in situ discrimination of volatile amines have been obtained. The limit of detection achieved was 1.5 mg m⁻³ for both, dimethylamine and methylamine, suitable to control real working atmospheres. This work has been supported by a PATENT P201300436 (Campíns-Falcó et al. [1]).