1. Department of Textile Engineering; Isfahan University of Technology; Isfahan 84156-83111 Iran
2. Center for Nanofibers and Nanotechnology; E3-05-14, Nanoscience and Nanotechnology Initiative, Faculty of Engineering, National University of Singapore, 2 Engineering Drive 3; Singapore 117576 Singapore
3. Department of Anatomical Sciences and Molecular Biology; School of Medicine; Isfahan University of Medical Sciences; Isfahan 81744-176 Iran
4. Department of Mechanical Engineering; Faculty of Engineering; National University of Singapore; 2 Engineering Drive 3, Singapore 117576 Singapore