1. College of Ocean and Earth Sciences College of Materials College of Physical Science and Technology State Key Laboratory of Marine Environmental Science (MEL) Research Institute for Biomimetics and Soft Matter Xiamen University 422 Siming Nan Road Xiamen 361005 P. R. China
2. College of Textiles Engineering Research Center of Technical Textile of Ministry of Education Donghua University Shanghai 201620 P. R. China
3. Department of Physics National University of Singapore 2 Science Drive 3 Singapore 117542 Singapore