Supplementary Material (ESI) for Soft Matter This journal is (c) The Royal Society of Chemistry 2010 1 Electronic supplementary information (ESI) A Nano-Fibrous Assembly of Collagen / Hyaluronic Acid for Controlling Cell-Adhesive Properties Toshinori Fujie 1 , Sho Furutate 1 , Daisuke Niwa 1 and Shinji Takeoka 1,2* 1 Department of Life Science and Medical Bioscience, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo 162-8480, Japan. 2 High-Tech Research Center, Waseda University, Tokyo 162-8480, Japan. * Corresponding author at: Department of Life Science and Medical Bioscience, Graduate School of Advanced Science and Engineering, Waseda University, 2-2 Wakamatsu-cho, Shinjuku-ku, Tokyo 162-8480, Japan. Tel.: +813-5369-7324, Fax : +813-5369-7324 E-mail address: takeoka@waseda.jp (S. Takeoka)