1. Flinders Institute for NanoScale Science and Technology, College of Science and Engineering, Flinders University, GPO Box 2100, Adelaide, South Australia 5001, Australia
2. Physics Department, Airlangga University, Kampus C Mulyorejo, Surabaya 60115, Indonesia
3. Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden