1. Department of Chemistry; National Central University; Taoyuan 32001 Taiwan
2. Department of Chemical and Materials Engineering; National Central University; Taoyuan 32001 Taiwan
3. Department of Chemical and Biomolecular Engineering; Sogang University; Seoul 121742 South Korea
4. Institute of Chemistry; Academia Sinica; Taipei 11529 Taiwan
5. Polyera Corporation; Skokie IL 60077 USA
6. Instrumentation Center; National Taiwan University; Taipei 10617 Taiwan
7. Institute of Polymer Science and Engineering; National Taiwan University; Taipei 10617 Taiwan
8. Department of Chemistry and the Materials Research Center; Northwestern University; Evanston IL 60208 USA