报告内容摘要

---

Mechanical properties of flexible films, for example surface strain of largely bending films, are key to design of stretchable electronic devices, wearable biointegrated devices, and soft microactuators/robots. However, existing methods are mainly based on strain-gauge measurements that require miniaturized array sensors, lead wires, and complicated calibrations. Here we introduce a facile method, based on surface-labelled gratings, for two-dimensional evaluation of surface strains in largely bending films. With this technique, we demonstrate that soft-matter mechanics can be distinct from the mechanics of hard materials. In particular, liquid-crystalline elastomers may undergo unconventional bending in three dimensions, in which both the inner and outer surfaces of the bending film are compressed. We also show that this method can be applied to amorphous elastomeric films, which highlights the general importance of this new mechanical evaluation tool in designing soft-matter-based electronic/photonic as well as biointegrated materials.

References:

Facile strain analysis of largely bending films by a surface-labelled grating method
N. Akamatsu, W. Tashiro, K. Saito, J. Mamiya, M. Kinoshita, T. Ikeda, J. Takeya, S. Fujikawa, A. Priimage and A. Shishido
Sci. Rep. 4, 5377/1-5377/6 (2014). DOI:10.1038/srep05377

Polymer Stabilization Enhances the Orientational Optical Nonlinearity of Oligothiophene-Doped Nematic Liquid Crystals
Y. Aihara, M. Kinoshita, J. Wang, J. Mamiya, A. Priimagi and A. Shishido
Adv. Opt. Mater. 1, 787-791 (2013). DOI: 10.1002/adom.201300326s

High-Contrast Photoswitching of Nonlinear Optical Response in Crosslinked Ferroelectric Liquid-Crystalline Polymers
A. Priimagi, K. Ogawa, M. Virkki, J. Mamiya, M. Kauranen and A. Shishido
Adv. Mater. 24, 6410-6415 (2012). DOI: 10.1002/adma.201203369

Location of the Azobenzene Moieties within the Cross-linked Liquid-crystalline Polymers can Dictate the Direction of Photoinduced Bending
A. Priimagi, A. Shimamura, M. Kondo, T. Hiraoka, S. Kubo, J. Mamiya, M. Kinoshita, T. Ikeda and A. Shishido
ACS Macro Lett. 1, 96-99 (2012). DOI: 10.1021/mz200056w

Simultaneous Analysis of Optical and Mechanical Properties of Crosslinked Azobenzene-containing Liquid-crystalline Polymer Films
A. Shimamura, A. Priimagi, J. Mamiya, T. Ikeda, Y. Yu, C. J. Barrett and A. Shishido
ACS Appl. Mater Interfaces, 3, 4190-4196 (2011).

 

报告人简介

---

Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama, Japan

http://www.polymer.res.titech.ac.jp/english

Professional Experiences

April, 1998         Research Fellow of Japanese Society for the Promotion of Science (JSPS)
April, 2000         Postdoctoral Fellow, Department of Electrical Engineering, Pennsylvania State University (Prof. I.C. Khoo)
January, 2001     Postdoctoral Fellow, National Science Foundation Materials Research Science and Engineering Center (NSF-MRSEC) at Pennsylvania State Univeristy (Profs. T. Mallouk, I.C. Khoo, and T. Mayer)
May, 2001         Assistant Professor, Tokyo Institute of Technology
April, 2005-        Associate Professor, Tokyo Institute of Technology Present

Awards

SPSJ Hitachi Chemical Award, The Society of Polymer Science, Japan (2009)

Award for Encouragement of Research in Polymer Science, The Society of Polymer Science, Japan (2005)

 

欢迎广大老师和研究生参加！

联系人： 于海峰  62764244