Martínez-Pérez Paula, García-Rupérez Jaime
Nanophotonics Technology Center, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
Beilstein J Nanotechnol. 2019 Mar 7;10:677-683. doi: 10.3762/bjnano.10.67. eCollection 2019.
Porous materials have become one of the best options for the development of optical sensors, since they maximize the interaction between the optical field and the target substances, which boosts the sensitivity. In this work, we propose the use of a readily available mesoporous material for the development of such sensors: commercial polycarbonate track-etched membranes. In order to demonstrate their utility for this purpose, we firstly characterized their optical response in the near-infrared range. This response is an interference fringe pattern, characteristic of a Fabry-Pérot interferometer, which is an optical device typically used for sensing purposes. Afterwards, several refractive index sensing experiments were performed by placing different concentrations of ethanol solution on the polycarbonate track-etched membranes. As a result, a sensitivity value of around 56 nm/RIU was obtained and the reusability of the substrate was demonstrated. These results pave the way for the development of optical porous sensors with such easily available mesoporous material.
多孔材料已成为开发光学传感器的最佳选择之一，因为它们能使光场与目标物质之间的相互作用最大化，从而提高灵敏度。在这项工作中，我们提议使用一种现成的介孔材料来开发此类传感器：商用聚碳酸酯径迹蚀刻膜。为了证明其在此用途上的实用性，我们首先对其在近红外范围内的光学响应进行了表征。这种响应是一种干涉条纹图案，是法布里-珀罗干涉仪的特征，法布里-珀罗干涉仪是一种通常用于传感目的的光学器件。之后，通过在聚碳酸酯径迹蚀刻膜上放置不同浓度的乙醇溶液进行了几次折射率传感实验。结果，获得了约56 nm/RIU的灵敏度值，并证明了该基底的可重复使用性。这些结果为用这种易于获得的介孔材料开发光学多孔传感器铺平了道路。
