1. IT Nano Electronic Device Laboratory Department of Electrical and Electronic Engineering Yonsei University Seodaemun-gu, 120–749 Seoul South Korea
2. Department of Smart Electric Korea Polytechnic 23, Yeomjeon-ro, 333beon-gil 22121 Nam-gu Incheon South Korea
3. College of Information Science and Technology Donghua University 2999 North Renmin Road, Songjiang District 201620 Shanghai P. R. China