Young's modulus of a switchable peptide film

Middelberg, Anton P. J., He, Lizhong, Dexter, Annette F., Shen, Hsin-hui, Holt, Stephen A. and Thomas, Robert K. (2007). Young's modulus of a switchable peptide film. In: Abstracts of Papers, 234th ACS National Meeting. Abstracts of Papers of the American Chemical Society, Boston, MA, United States, (). 19-23 August.

Author Middelberg, Anton P. J.
He, Lizhong
Dexter, Annette F.
Shen, Hsin-hui
Holt, Stephen A.
Thomas, Robert K.
Title of paper Young's modulus of a switchable peptide film
Conference name Abstracts of Papers of the American Chemical Society
Conference location Boston, MA, United States
Conference dates 19-23 August
Proceedings title Abstracts of Papers, 234th ACS National Meeting
Journal name Abstracts of Papers of the American Chemical Society
Place of Publication Washington, DC USA
Publisher American Chemical Society
Publication Year 2007
Sub-type Published abstract
ISSN 0065-7727
Volume 234
Total pages 1
Language eng
Formatted Abstract/Summary
We report the structure and Young's modulus of switchable films formed by peptide self-assembly at the air-water interface. Peptide AM1 forms an interfacial film that can be switched reversibly from a high- to a low-elasticity state, accompanied by rapid loss of stability in peptide-contg. emulsions or foams. By neutron reflectometry, we find the AM1 film comprises a thin (ca. 15 Å) monolayer of folded peptide in both states, confirming that it is possible to alter the mech. properties of an interfacial ensemble without significantly altering its architecture. Based on the film thickness, we report the first exptl. detd. Young's modulus for a peptide film self-assembled at a fluid interface (E = 80 MPa for AM1, switching to E < 20 MPa). The findings suggest a fundamental link between E and the macroscopic stability of peptide-contg. foams and emulsions.
Q-Index Code EX
Q-Index Status Provisional Code
Institutional Status UQ
Additional Notes Meeting Abstract: 95-COLL

 
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