ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
A molecular theory of the piezoelectric constant of the α-helical backbone of polypeptide is developed on the basis of fluctuation formalism. The piezoelectric constant, electric susceptibility, and elastic compliance of the α-helix are calculated through the method of molecular lattice dynamics by use of normal-coordinate analysis. Displacements of each atom due to the external stress exerted upon the backbone are also calculated. The piezoelectricity of the α-helix is concluded to arise mainly from rotation of the CO—NH bond. The value of the piezoelectric constant of poly(γ-benzyl-L-glutamate) film calculated from the above theoretical constants along with a composite theory is found to agree reasonably with experiment.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1980.180180507
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