Ultrasensitive detection of microRNA-21 in human serum based on the confinement effect enhanced chemical etching of gold nanorods
aKey Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, China
bDepartment of Biological and Chemical Engineering, Chongqing University of Education, Chongqing 400067, China
cThe Ninth People's Hospital of Chongqing, Chongqing 400700, China
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