1. a Department of Chemistry and Southampton Liquid Crystal Institute , University of Southampton , Highfield, Southampton , SO17 1BJ , United Kingdom
2. b Department of Information Systems Engineering , Osaka Sangyo University , 3-1-1, Nakagaito, Daito, Osaka , 574-8530 , Japan E-mail:
3. c Department of Biophysics , Max-Planck-Institut für Medizinische Forschung , Jahnstrasse 29, Heidelberg , D-69120 , Germany