Ultrasensitive and label-free detection of γ-aminobutyric acid using fiber-optic interferometric sensors functionalized with size-selective molecular sieve arrays. - Huang, Yunyun; Ding, Mingfei; Guo, Tuan; Zhang, Ning; Tian, Zhuang; Sun, Li-Peng; Guan, Bai-Ou (Sensors & Actuators B: Chemical, 2017)