Dried foam films: Free-standing, water-free, reversed bilayers


Jian Jin, JIN.Jian@nims.go.jp and Izumi Ichinose Sr., ICHINOSE.Izumi@nims.go.jp. Organic Nanomaterials Center, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
Foam films and lipid membranes are typical two-dimensional assemblies of amphiphiles with an inverse molecular arrangement. In contrast with the lipid membranes spontaneously formed in water, foam films are formed in the air. Foam films have long been perceived to vanish when water is evaporated. However, we found that some kinds of foam films maintain their structure even after completely drying. These free-standing, water-free, reversed bilayer films were obtainable from aqueous or organic solutions in ambient air. The films were found stable even at temperature higher than 100 degrees Celsius. The films are coined as “Dried Foam Films”. Besides thermal stability, dried foam films are also mechanically stable. They can be used as template to deposit various inorganic thin films or hybrid multi-layer films from several nanometer to several tens nanometer in thick, thus to produce self-supporting inorganic ultrathin films.

Biological Surface Chemistry
8:30 AM-11:50 AM, Monday, March 26, 2007 McCormick Place South -- Room S404A, Level 4, Oral

Division of Colloid & Surface Chemistry

The 233rd ACS National Meeting, Chicago, IL, March 25-29, 2007