1. Institute
of Micro/Nanotechnology, Old Dominion University, Norfolk, Virginia 23529, United
States
2. Department of Chemical
Engineering, National Taiwan University, Taipei 10617, Taiwan
3. School
of Mechanical Engineering, Yeungnam University, Gyongsan 712-749, South Korea
4. Department of Mathematics, Tamkang University, Tamsui, Taipei 25137, Taiwan