1. Electroceramics Research Laboratory, College of Nanotechnology, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand;
2. Advanced Materials Research Unit, Department of Chemistry, Faculty of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand;
3. Nano-KMITL Center of Excellence on Nanoelectronic Devices, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand