1 Electronic Supplementary Information Diameter-Based Separation of Single-Walled Carbon Nanotubes through Selective Extraction with Dipyrene Nanotweezers A. F. M. Mustafizur Rahman, + Feng Wang, + Kazunari Matsuda, # Takahide Kimura, + and Naoki Komatsu + , * + Department of Chemistry, Shiga University of Medical Science, Seta, Otsu 520-2192, Japan # Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan Supplementary Material (ESI) for Chemical Science This journal is (c) The Royal Society of Chemistry 2011