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Rapid 3D Patterning of Poly(acrylic acid) Ionic Hydrogel for Miniature pH Sensors
Ming-Jie Yin1, Mian Yao1,2, Shaorui Gao1
1Photonics Research Center, Department of Electrical Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong, SAR, China.
Advanced Materials (Deerfield Beach, Fla.)
|December 9, 2015
Abstract:
Poly(acrylic acid) (PAA), as a highly ionic conductive hydrogel, can reversibly swell/deswell according to the surrounding pH conditions. An optical maskless -stereolithography technology is presented to rapidly 3D pattern PAA for device fabrication. A highly sensitive miniature pH sensor is demonstrated by in situ printing of periodic PAA micropads on a tapered optical microfiber.
