1. Semiconductor Evaluation Laboratory, Evaluation and Analysis Technology Center, Toshiba Nanoanalysis Corporation, Kawasaki, Japan
2. Functional Materials Laboratory, Corporate Research & Development Center, Research & Development Division, Toshiba Corporation, Kawasaki, Japan
3. Division of Pharmaceutics, Department of Pharmacology, Toxicology and Therapeutics, School of Pharmacy, Showa University, Tokyo, Japan
4. Engineering Planning Department, Planning Division, Toshiba Nanoanalysis Corporation, Kanagawa, Japan
5. Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences, Teikyo Heisei University, Tokyo, Japan