1 Supporting Information Nanospherical Polymer as an MRI Sensor without Paramagnetic or Superparamagnetic Species Satoshi Okada, Shin Mizukami, Yutaka Matsumura, Yoshichika Yoshioka, and Kazuya Kikuchi * * e-mail: kkikuchi@mls.eng.osaka-u.ac.jp Contents: 1. Materials and instruments 2. Synthesis 3. Experimental procedures 4. Supporting scheme, table, and figures 5. References Electronic Supplementary Material (ESI) for Dalton Transactions This journal is © The Royal Society of Chemistry 2013