详见：

Boshi Tian, Shaohua Liu, Shuyi Wu, Wei Lu, Dan Wang, Lin Jin,* Bin Hu, Ke Li, Zhenling Wang,* Zewei Quan*, “pH-responsive poly (acrylic acid)-gated mesoporous silica and its application in oral colon targeted drug delivery for doxorubicin”，Colloids and Surfaces B: Biointerfaces，Accepted, DOI:10.1016/j.colsurfb.2017.03.024