1. State Key Laboratory of Bio‐Fibers and Eco‐TextilesQingdao University No. 308 Ningxia Road Qingdao 266071 P. R. China
2. College of PhysicsUniversity‐Industry Joint Center for Ocean Observation and Broadband CommunicationQingdao University Qingdao 266071 P. R. China
3. Division of Materials ScienceDepartment of Engineering Sciences and MathematicsLuleå University of Technology Luleå 971 87 Sweden
4. Department of Molecular Science and Nano SystemsCa' Foscari University of Venice Via Torino 155 Venezia Mestre 30172 Italy
5. Centre for EnergyMaterials and TelecommunicationsInstitut National de la Recherche ScientifiqueUniversité du Québec 1650 Boulevard Lionel‐Boulet Varennes Québec J3X1S2 Canada