1. Center of Research Excellence in Nanotechnology (CENT) King Fahd University of Petroleum & Minerals (KFUPM), KFUPM Box 5040 Dhahran 31261 Saudi Arabia
2. Physics Department King Fahd University of Petroleum & Minerals KFUPM Box 5047 Dhahran 31261 Saudi Arabia
3. Mizushori System Co. 61-1 Ikehanacho, Kitaku Nagoya Japan