1. Institute
of Polymer Science and Engineering, National Taiwan University, No.
1, Sec. 4 Roosevelt Road, Taipei 10617, Taiwan, R.O.C.
2. Institut
Europeen des Membranes, Universite Montpellier, Montpellier 34090, France
3. Department
of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan, R.O.C.
4. National Synchrotron Radiation Research Center, Hsinchu City 300, Taiwan, R.O.C.