Key Laboratory of Molecular and Biomolecular Electronics (Southeast University),Ministry of Education, Nanjing 210096, China;
College of Science, Dalian Fisheries University, Dalian 116023, China;
Key Laboratory of Molecular and Biomolecular Electronics (Southeast University),Ministry of Education, Nanjing 210096, China;
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China;
colloid crystal multilayers; solvent modification; Fabry- Perot fringes; layer number;