Photonic crystal based optical chemical sensor for environmental monitoring
Photonic crystal based optical chemical sensor for environmental monitoring
复制标题
DOI：
10.1109/nano.2007.4601340
复制
发表时间：
2007-08
期刊：
影响因子：
--
通讯作者：
T. Endo;Y. Yanagida;T. Hatsuzawa
中科院分区：
文献类型：
--
作者：
T. Endo;Y. Yanagida;T. Hatsuzawa
纳米结构材料（例如纳米粒子）作为新型传感装置具有很大的可能性。在本研究中，旨在开发用于环境监测的基于光子晶体的光学化学传感器。该传感器由玻璃基板和使用纳米颗粒的三维光子晶体和聚（二甲基硅氧烷）（PDMS）弹性体组成。这种光子晶体是通过将液体预聚物渗透到纳米颗粒的乳色晶格内的空隙中，然后进行热固化而产生的。当能够溶胀弹性体基质的非极性有机溶剂被引入该传感器的表面时，晶格常数增加，从而布拉格衍射光的波长增加。基于该机制，我们演示了挥发性有机化合物（VOC）的检测。因此，这种基于光子晶体的光学化学传感器可用于专门确定 VOC 浓度。此外，使用这种基于光子晶体的光学化学传感器，可以用肉眼观察到光学特性的变化。因此，该光学化学传感器可适用于环境应用的现场监测。
The nanostructured materials such as nanoparticles have great possibilities as a novel sensing device. In this study, development of the photonic crystal based optical chemical sensor for environmental monitoring was aimed. The sensor consists of a glass substrate with a three-dimensional photonic crystal using nanoparticles and poly(dimethylsiloxane) (PDMS) elastomer. Such a photonic crystal was generated by infiltrating the voids within an opaline lattice of nanoparticles with a liquid prepolymer to PDMS, followed by thermal curing. When a nonpolar organic solvents capable of swelling the elastomer matrix, was introduced to the surface of this sensor, the lattice constant and thus the wavelength of Bragg diffracted light was increased. On the basis of this mechanism, we demonstrated the detection of volatile organic compounds (VOCs). As a result, this photonic crystal based optical chemical sensor could be used to specifically determine the VOCs concentrations. Additionally, using this photonic crystal based optical chemical sensor, the change in the optical characteristics could be observed with the naked eye. Therefore, this optical chemical sensor can be applicable to on-site monitoring for environmental applications.