1 Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, OH, USA.
2 State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian, China.
3 Center for Electron Microscopy and Analysis, The Ohio State University, Columbus, OH, USA.
4 Department of Materials Science and Engineering, The Ohio State University, Columbus, OH, USA.
5 Division of Pharmaceutics & Pharmacology, College of Pharmacy, The Ohio State University, Columbus, OH, USA. dong.525@osu.edu.
6 Department of Biomedical Engineering, Center for Clinical and Translational Science, Comprehensive Cancer Center, Dorothy M. Davis Heart & Lung Research Institute, Department of Radiation Oncology, The Ohio State University, Columbus, OH, USA. dong.525@osu.edu.