1 School of Pharmacy, Medical College, and Institute for Chemical Biology & Biosensing, and College of Life Sciences, Qingdao University, 308 Ningxia Road, Qingdao 266071, China. liuah@qdu.edu.cn.
2 Qingdao Institute for Food and Drug Control, 7 Longde Road, Qingdao 266073, China.
Histidine can trigger bimetallic gold/copper nanoclusters to turn on strong red fluoresence, which is capable of sensing nanomolar levels of histidine selectively.