Break‐up of Two‐Dimensional MnO2 Nanosheets Promotes Ultrasensitive pH‐Triggered Theranostics of Cancer

Abstract
Chemically exfoliated two‐dimensional MnO2 nanosheets are successfully modified with amino‐polyethylene glycol as a theranostic platform for ultrasensitive stimuli‐responsive theranostics of cancer. The highly dispersed MnO2 nanosheets exhibit a unique break‐up in the mildly acidic microenvironment of tumor tissues, which could substantially enhance their in vitro and in vivo performances in T1‐weighted magnetic resonance imaging. Such a pH‐triggered breaking‐up behavior could further promote the fast release of loaded anticancer drugs for concurrent pH‐responsive drug release and circumvent the multidrug resistance of cancer cells.
Funding Information
  • Australian Research Council
  • National Nature Science Foundation of China (51302293, 51132009)
  • Foundation for Youth Scholar of State Key Laboratory of High Performance Ceramics and Superfine Microstructure (SKL201203)