1 GBA National Institute for Nanotechnology Innovation, Guangzhou, Guangdong 510700, P.R. China. chenchy@nanoctr.cn.
2 CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety & CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology of China, Beijing 100190, P.R. China. liuy@nanoctr.cn.
3 Department of Vascular and Endovascular Surgery, Chinese PLA General Hospital, Beijing 100853, P.R. China. guoweiplagh@sina.com.
4 Department of Ultrasound, Hospital of Renmin University of China, Beijing 100872, P.R. China.
5 Department of Echocardiography, Peking University Third Hospital, Beijing 100191, P.R. China.
6 PLA Rocket Force Characteristics Medical Center, Beijing 100888, P.R. China.
Retraction of 'A solid ultrasonic coupling membrane for superficial vascular ultrasonography' by Di Sun et al., Nanoscale, 2022, 14, 3545-3553, https://doi.org/10.1039/D1NR05353A.