1. Research Institution for Biomimetics and Soft MatterCollege of MaterialsCollege of Physical Science and TechnologyFujian Provincial Key Laboratory for Soft Functional Materials ResearchJiujiang Research InstituteXiamen University Xiamen 361005 P. R. China
2. Key Laboratory of Textile Science & TechnologyMinistry of EducationCollege of TextilesDonghua University Shanghai 201620 P. R. China
3. College of Textile and ClothingXinjiang University Urumqi 830000 P. R. China
4. Department of PhysicsFaculty of ScienceNational University of Singapore Singapore 117542 Singapore