A precision structured smart hydrogel for sensing applications
A precision structured smart hydrogel for sensing applications
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DOI：
10.1063/1.5006032
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发表时间：
2017-10
影响因子：
3.2
通讯作者：
J. Menges;P. Kleinschmidt;H. Bart;E. Oesterschulze
中科院分区：
文献类型：
--
作者：
J. Menges;P. Kleinschmidt;H. Bart;E. Oesterschulze
我们报道了一种基于大分子引发剂的智能水凝胶薄膜，它应用于微悬臂梁上，用于传感应用。所研究的水凝胶具有较宽的电解质离子强度变化的动态范围。此外，它提供了一种简单的旋涂薄膜沉积工艺，以及通过反应离子刻蚀获得高深宽比微结构的能力。这使得该水凝胶与微电子机械系统集成兼容。作为概念的证明，我们研究了水凝胶功能化悬臂梁在不同离子强度的氯化钠水溶液中的响应。与文献中报道的大多数水凝胶材料不同，我们发现我们的水凝胶在高离子强度环境下仍然具有响应性。这可能是未来传感的兴趣，例如，在海水或尿液等生理环境中。
We report on a macroinitiator based smart hydrogel film applied on a microcantilever for sensing applications. The studied hydrogel features a comparatively wide dynamic range for changes in the electrolyte's ionic strength. Furthermore, it offers a simple spin coating process for thin film deposition as well as the capability to obtain high aspect ratio microstructures by reactive ion etching. This makes the hydrogel compatible to microelectromechanical system integration. As a proof of concept, we study the response of hydrogel functionalized cantilevers in aqueous sodium chloride solutions of varying ionic strength. In contrast to the majority of hydrogel materials reported in the literature, we found that our hydrogel still responds in high ionic strength environments. This may be of future interest for sensing e.g., in sea water or physiological environments like urine.