Displacive Transformations in Non-Metallic Materials: Session 2
Program Organizers: Mohsen Asle Zaeem, Missouri University of Science and Technology
Wednesday 8:00 AM
July 12, 2017
Location: Hyatt Regency Chicago
Session Chair: Mohsen Asle Zaeem, Missouri University of Science and Technology
8:00 AM Invited
Discovery of Superelasticity and Shape-memory Effect in Organic Crystals: Satoshi Takamizawa1; 1Yokohama City University
I am willing to introduce "organosuperelasticity." I have found some organic solids superelastic and capable of exhibiting alloy-like shape memory effect. Considering currently expected applications of superelastic and shape-memory alloys, "organosuperelasticity" would have the potential newness to develop the new science of superelastic materials by material diversification and functionalization since chemical design can be effectively applied. References: 1 S. Takamizawa, Y. Miyamoto, Angew. Chem. Int. Ed. 2014, 53, 6970. （Highlighted in Nature） 2 S. Takamizawa, Y. Takasaki, Angew. Chem. Int. Ed. 2015, 54, 4815. 3 S. Takamizawa, Y. Takasaki, Chem. Sci. 2016, 7, 1527.4 Y. Takasaki, S. Takamizawa, Nature Commun. 2015, 6, 8934.
8:40 AM Invited
Liquid Crystal Elastomers: Solid Liquid Crystals: Peter Palffy-Muhoray1; 1Liquid Crystal Institute
Liquid crystal elastomers (LCEs) are soft elastic solids with orientational order, but little or no positional order. Their salient feature is the coupling of orientational order and mechanical strain. As a consequence of this coupling, LCEs respond readily to a variety of excitations. I will give an overview of LCEs, discuss their fundamental physics, give examples of some unusual behavior and indicate potential applications in areas such as sensing, actuation and energy conversion.
Biological Martensitic Transformations in Cylindrically Crystalline Protein Structures: Ricardo Komai1; Greg Olson1; 1Northwestern University
Biological martensitic phase transformations have occurred in nature for billions of years. Viruses and bacteria possess structural proteins that order as cylindrically crystalline lattices. These cylindrical lattices are what enable the martensitic phase transformation. Viruses use the martensitic phase transition as a means to infect organisms, while bacteria use the transformation to produce motion in various biological fluids in a variety of thermal, chemical and mechanical conditions. This work will demonstrate the application of the CALPHAD approach to describe these phase transitions in bacterial flagella and discuss the extension of these methods to explain other protein structures and functions. Biological function of proteins is highly dependent upon structure and changing configuration will change this function. By studying the martensitic phase transformations in proteins, knowledge of martensite can be used to develop new understanding and treatments of organic protein based diseases.
10:00 AM Break