Kim-Ngan T Tran^†, Ashokkumar Kumaravel^†, Soon Ho Hong^*
Department of Chemical Engineering, University of Ulsan, Ulsan 44610, Korea
Tel: +82-52-259-1293; Fax: +82-52-259-1689
E-mail: shhong@ulsan.ac.kr
^†Kim-Ngan T Tran and Ashokkumar Kumaravel are co-first authors and contributed equally to this work.