Issue 12, 2007
From the journal:

Soft Matter

Swelling of a cluster phase in Langmuir monolayers containing semi-fluorinated phosphonic acids

Siwar Trabelsi,a   Shishan Zhang,b   T. Randall Leeb  and  Daniel K. Schwartz*a  

* Corresponding authors

a Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309-0424, USA
E-mail: Daniel.Schwartz@colorado.edu
Fax: +1 303-492-4341
Tel: +1 303-735-0240

b Department of Chemistry, University of Houston, Houston, TX 77204-5003, USA

Abstract

Langmuir monolayers of semi-fluorinated nonadecylphosphonic acid (F8H11PO3), hexadecylphosphonic acid (H16PO3), and their mixtures were investigated by Brewster angle microscopy (BAM), atomic force microscopy (AFM) and surface-pressure measurements. Nanometre-scale two-dimensional clusters were observed by AFM in a spread monolayer of pure F8H11PO3 transferred to mica. Two different organized arrangements of clusters were observed. AFM and BAM observations showed that the mixture exhibits a solid phase over a large range of mole fraction and surface pressure, sometimes in coexistence with clusters. With increasing mole fraction of H16PO3, the lateral shape of these clusters remains the same while their organization and their height change.

Graphical abstract: Swelling of a cluster phase in Langmuir monolayers containing semi-fluorinated phosphonic acids

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Article information

DOI
https://doi.org/10.1039/B711286F
Article type
Paper
Submitted
24 Jul 2007
Accepted
27 Sep 2007
First published
15 Oct 2007

Soft Matter, 2007,3, 1518-1524

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Swelling of a cluster phase in Langmuir monolayers containing semi-fluorinated phosphonic acids

S. Trabelsi, S. Zhang, T. R. Lee and D. K. Schwartz, Soft Matter, 2007, 3, 1518 DOI: 10.1039/B711286F

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