Ultrasensitive Electrochemical Detection of Prostate-Specific Antigen (PSA) Based on Graphene-Silver Nanocomposite

1 Department of Andrology, The Affiliated Hospital of Qingdao University, No.16 Jiangsu Road, Shinan District, Qingdao City, Shandong Province, 266000, P.R. China 2 Department of Ophthalmology, Qingdao Haici Medical Group, Qingdao City, Shandong Province, 266000, P.R. China 3 Department of Urology, The Affiliated Hospital Of Qingdao University, No.16 Jiangsu Road, Shinan District, Qingdao City, Shandong Province, 266000, P.R. China * E-mail: hongqiangwangsally@qq.com