1. Department of Mechanical and Materials Engineering, University of Turku, Turku FI-20014, Finland
2. Raman Research Institute, C. V. Raman Avenue, Sadashivanagar, Bangalore 560080, India
3. Institute of Polymer Nanotechnology (INKA), FHNW University of Applied Sciences and Arts Northwestern Switzerland, School of Engineering, Klosterzelgstrasse 2, Windisch 5210, Switzerland
4. Laboratory for Surface Science and Technology, Department of Materials, ETH Zurich, Zürich 8092, Switzerland
5. Department of Chemistry, Nitte Meenakshi Institute of Technology, Yelahanka, Bangalore 560064, India