Ppbv-level mid-infrared photoacoustic sensor for mouth alcohol test after consuming lychee fruits oleh Huijian Luo, Zhifei Yang, Ruobin Zhuang, Haohua Lv, Chenglong Wang, Haoyang Lin, Di Zhang, Wenguo Zhu, Yongchun Zhong, Yuan Cao, Kun Liu, Ruifeng Kan, Yuwen Pan, Jianhui Yu, Huadan Zheng