An ultrasensitive smartphone-assisted bicolor-ratiometric fluorescence sensing platform based on a “noise purifier” for point-of-care testing of pathogenic bacteria in food

Lulu Cao, Yuwei Ren, Na Ling, Qinghua Ye, Yuwei Wu, Xinyu Zhao, Qihui Gu, Shi Wu, Youxiong Zhang, Xianhu Wei, Yingwang Ye, Qingping Wu