Layer-by-Layer Assembled Multilayer Thin Films;
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  • Layer-by-Layer Assembled Multilayer Thin Films;

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Faculty of Engineering and Natural Sciences

 

SEMINAR ANNOUNCEMENT

 

 

 

 

Layer-by-Layer Assembled Multilayer Thin Films; Creating Functional Surfaces and Stimuli Responsive Nanocomposite Materials

 

 

Fevzi Cebeci, Ph.D.

 

Department of Materials Science and Engineering

 

 

 

Summary:

 

A large spectrum of materials including, but not limited to charged polymers, carbon nanotubes and nanoparticles can be sequentially assembled onto surfaces from aqueous solutions to create thin film coatings with desired properties that are readily alterable at the nanoscale. These multilayer thin films can be assembled from polymerpolymer, polymernanoparticle, polymernanofiber, nanofiber nanotube, and nanoparticlenanoparticle compositions with diverse architectures. Properties of these films can easily be tuned by controlling processing conditions such as solution pH and ionic strength.

 

First, multilayer thin films and several approaches to create functional coatings by versatile

layerbylayer assembly techniques will be introduced. A variety of multifunctional coatings exhibiting superhydrophobic, antireflection and antifogging properties will be discussed. In the second part, a simple but effective approach to fabricate stimuliresponsive nanocomposite assemblies of nanoparticles and nanofibers by layering polyelectrolytes will be addressed. Stimulusresponsive percolative materials are of great interest due to expected dramatic changes in properties, in particular mechanical behavior, below and above the percolation threshold whereby the responsive units contact each other and form a continuous path through the entire system. These nanocomposite structures exhibit powerful advantages for the design and fabrication of multifunctional materials.

 

 

Nov. 13, 2009, 13:40, MDBF L035