**Author details**

Phuoc Huu Le1 and Chih-Wei Luo2 \*

1 Department of Physics and Biophysics, Faculty of Basic Sciences, Can Tho University of Medicine and Pharmacy, Can Tho, Vietnam

2 Department of Electrophysics, National Chiao Tung University, Hsinchu, Taiwan, Republic of China

\*Address all correspondence to: cwluo@mail.nctu.edu.tw

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
