CHE Seminars  

Speaker Dr. Atsushi Hozumi
National Institute of Advanced Industrial Science and Technology (AIST), Nagoya, Japan
Topic Energy Storage: Flow Batteries
Date 06,April 2016 (Wednesday)
Place L-2
4 pm. - 5 pm.

The development of novel liquid-repellent surfaces inspired by examples from nature, including the lotus leaf, the water striders’ leg, pitcher plant, etc., have attracted considerable attention across many scientific disciplines, with results ranging from fundamental research to practical applications. Although the creation of functional artificial surfaces which effectively for repel water have been widely researched, there still remains a challenge in creating easily dewetting oleophobic/superoleophobic surfaces. Such functional surfaces have been commonly prepared by combining the influence of surface texturing with that of perfluorinated organic compounds, in particular, perfluoroalkylsilanes or perfluorinated fluids. However, the chemical and physical effects of such fluorinated compounds on human health and the environment have lately been questioned, increasing the demand for alternative easy-dewetting surfaces against various organic liquids. From a viewpoint of environmental friendliness and energy/resource saving, the use of “ubiquitous elements” is a key factor in future practical, nature-inspired technologies.
In this seminar, we introduce our concept for realizing excellent dynamic dewetting properties against various organic liquids with low surface energies, without relying on complicated surface roughening techniques and perfluorinated compounds. Our smooth and transparent surfaces, including monolayers, polymer brushes, and hybrid films, are “statically oleophilic but dynamically oleophobic”, and on which probe liquids can move very smoothly, without pinning, at very low substrate tilt angles.

Atsushi Hozumi is a group leader at the Advanced Surface and Interface Chemistry Group, Structural Materials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), in Nagoya, Japan. He holds B.S. and M.E. degrees from Tokyo Science University and a Ph.D. from Nagoya University. He joined the National Industrial Research Institute of Nagoya (NIRIN), Ministry of Trade and Industry, Japan in 1999 (reorganized as AIST in 2001). He belonged to the Nonferrous Metals Division/Nanotechnologies & Advanced Materials' Policy Planning Office, Ministry of Economy Trade and Industry (METI), Tokyo, Japan, as an Industrial Technology Planning Officer in 2006. He also spent 2007 as a visiting Scholar at the University of Bristol, England (Prof. Stephen Mann’s group), as a visiting professor at University of Massachusetts Amherst, USA (Prof. Thomas J. McCarthy’s group), a collaboration which is still going on. His research focuses on the control of surface wetting/dewetting using monolayers, polymer brushes, hybrid films etc, and their practical applications. He currently serves on the editorial boards of Materials Letters, Elsevier.

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