Angew. Chem. Int. Ed. 2010, 49, 8214 –8219

Intracellular pH-Responsive Mesoporous Silica Nanoparticles for the Controlled Release of Anticancer Chemotherapeutics**
Chia-Hung Lee, Shih-Hsun Cheng, I-Ping Huang, Jeffrey S. Souris, Chung-Shi Yang,
Chung-Yuan Mou, and Leu-Wei Lo*