全息术
生物传感器
折射率
分析物
自愈水凝胶
纳米技术
肉眼
材料科学
制作
光学
计算机科学
光电子学
作者
María Isabel Lucío,Aitor Cubells-Gómez,Ángel Maquieira,María-José Bañuls
标识
DOI:10.1007/s00216-021-03746-1
摘要
Hydrogel-based holographic sensors consist of a holographic pattern in a responsive hydrogel that diffracts light at different wavelengths depending on the dimensions and refractive index changes in the material. The material composition of hydrogels can be designed to be specifically responsive to different stimuli, and thus the diffraction pattern can correlate with the amount of analyte. According to this general principle, different approaches have been implemented to achieve label-free optical sensors and biosensors, with advantages such as easy fabrication or naked-eye detection. A review on the different approaches, sensing materials, measurement principles, and detection setups, and future perspectives is offered. Graphical abstract
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