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Proceedings Paper

Designing for advanced materials by the deltaTt-mechanism
Author(s): Dan W. Urry; Larry C. Hayes; Shao Qing Peng
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Paper Abstract

Smart functions in biological systems are discussed from the perspective of the temperature at which inverse transitions of hydrophobic folding and assembly occur in response to increases in the temperature. The design of advanced materials is demonstrated in terms of the capacity to control the temperature, Tt, at which the inverse temperature transitions occur by controlling polymer hydrophobicity and by utilizing an associated hydrophobic-induced pKa shift. A smart material is recognized as one in which the material is responsive to the particular variable of interest, to the particular change in the variable that is required, and under the required conditions of temperature, pH, pressure, etc. By the proper design of the polymer, it is demonstrated that two distinguishable smart functions can be coupled such that an energy input that alters one function causes a change in the second function as an output. To become coupled the two distinguishable functions need to be part of the same hydrophobic folding domain. By way of example, a protein-based polymer was designed to carry out the conversion of electrochemical energy to chemical energy, i.e., electro-chemical transduction, under specified conditions of temperature and pH. This design approach utilizes the (Delta) Tt-mechanism of free energy transduction.

Paper Details

Date Published: 9 February 1996
PDF: 4 pages
Proc. SPIE 2716, Smart Structures and Materials 1996: Smart Materials Technologies and Biomimetics, (9 February 1996); doi: 10.1117/12.232162
Show Author Affiliations
Dan W. Urry, Univ. of Alabama/Birmingham (United States)
Larry C. Hayes, Univ. of Alabama/Birmingham (United States)
Shao Qing Peng, Univ. of Alabama/Birmingham (United States)

Published in SPIE Proceedings Vol. 2716:
Smart Structures and Materials 1996: Smart Materials Technologies and Biomimetics
Andrew Crowson, Editor(s)

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