1. Soft Matter Optoelectronics, Experimentalphysik II, University of Bayreuth, Bayreuth 95440, Germany
2. Departments of Chemistry and Chemical Engineering, National University of Singapore, Singapore 119077, Singapore
3. Bayreuth Institute of Macromolecular Research (BIMF) and Bavarian Polymer Institute (BPI), University of Bayreuth, Bayreuth 95440, Germany