1. Intelligent Polymer Research Institute and ARC Centre of Excellence for Electromaterials Science, University of Wollongong, New South Wales 2522, Australia
2. Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9001, New Zealand
3. Division of Chemistry and Materials, Faculty of Textile Science and Technology, Shinshu University, Ueda, 386-8567, Japan