1. Materials Science; School of Mechanical, Industrial, and Manufacturing Engineering; Oregon State University; Corvallis Oregon 97331
2. School of Physics; Institute of Science; Suranaree University of Technology and NANOTEC-SUT Center of Excellence on Advanced Functional Nanomaterials; Nakhon Ratchasima 30000 Thailand
3. Materials Science and Engineering; University of Sheffield; Sheffield S1 3JD UK
4. Institute of Physics; Academy of Sciences of the Czech Republic; Prague 182 21 Czech Republic