1. Department for Soft Matter, Institute for Physics, Otto-von-Guerick University, 39106 Magdeburg, Germany.
2. School of Physical and Mathematical Sciences, Department of Physics and Applied Physics, Nanyang Technological University, Singapore 637371, Singapore.
3. King Abdullah University of Science and Technology (KAUST), Water Desalination and Reuse Center (WDRC), Biological and Environmental Science and Engineering (BESE) Division, Thuwal 23955-6900, Saudi Arabia.