Song Kyeong Min, Kim Shinho, Kang Sungmin, Nam Tae Won, Kim Geon Yeong, Lim Hunhee, Cho Eugene N, Kim Kwang Ho, Kwon Se Hun, Jang Min Seok, Jung Yeon Sik
Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
Sci Adv. 2021 Sep 17;7(38):eabg8013. doi: 10.1126/sciadv.abg8013. Epub 2021 Sep 15.
Rapid, accurate, and intuitive detection of unknown liquids is greatly important for various fields such as food and drink safety, management of chemical hazards, manufacturing process monitoring, and so on. Here, we demonstrate a highly responsive and selective transparency-switching medium for on-site, visual identification of various liquids. The light scattering–based sensing medium, which is designed to be composed of polymeric interphase voids and hollow nanoparticles, provides an extremely large transmittance window (>95%) with outstanding selectivity and versatility. This sensing medium features ternary transparency states (transparent, semitransparent, and opaque) when immersed in liquids depending on liquid-polymer interactions and diffusion kinetics. Several different types of these transparency-changing media can be configured into an arrayed platform to discriminate a wide variety of liquids and also quantify their mixing ratios. The outstanding versatility and user friendliness of the sensing platform allow the development of a practical tool for discrimination of diverse organic liquids.
快速、准确且直观地检测未知液体对于食品饮料安全、化学危害管理、制造过程监测等各个领域都极为重要。在此，我们展示了一种用于现场视觉识别各种液体的高响应性和选择性的透明度切换介质。基于光散射的传感介质由聚合物相间空隙和空心纳米粒子组成，具有极大的透光窗口（>95%），选择性和通用性出色。这种传感介质浸入液体时，根据液体与聚合物的相互作用和扩散动力学呈现出三种透明度状态（透明、半透明和不透明）。几种不同类型的这种透明度变化介质可以配置成阵列平台，以区分多种液体并量化它们的混合比例。该传感平台出色的通用性和用户友好性使得能够开发出一种用于鉴别各种有机液体的实用工具。
