Progressive pearl necklace collapse mechanism for cerato-ulmin aggregation film

Sbrana, F., Fanelli, D., Vassalli, M. , Carresi, L., Scala, A., Pazzagli, L., Cappugi, G. and Tiribilli, B. (2010) Progressive pearl necklace collapse mechanism for cerato-ulmin aggregation film. European Biophysics Journal with Biophysics Letters, 39, pp. 971-977. (doi: 10.1007/s00249-009-0465-6) (PMID:19471919)

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Abstract

Cerato-ulmin (CU) is a fungal toxin class II hydrophobin, involved in Dutch elm disease. The formation of hydrophobin films at the air–water interface is a key mechanism which plays a role of paramount importance at different stages of the fungal development. We present a study on the precursor stages of growth towards the self-assembly aggregation film of CU. Atomic force microscopy images of CU dropped on mica substrates indicate that the system self-organizes in almost one-dimensional pearl-necklace-like chains, which subsequently collapse and possibly merge to form extended and rather compact planar films. We propose and verify a simple model to describe the self-aggregation mechanism in terms of progressive thickening of the pearl chains due to the successive merging and collapse of the elementary constitutive units.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Vassalli, Dr Massimo
Authors: Sbrana, F., Fanelli, D., Vassalli, M., Carresi, L., Scala, A., Pazzagli, L., Cappugi, G., and Tiribilli, B.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:European Biophysics Journal with Biophysics Letters
Publisher:Elsevier
ISSN:0175-7571
ISSN (Online):1432-1017

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