Broniatowski M, Obidowicz K, Vila Romeu N, Broniatowska E, Dynarowicz-Łatka P. Mixed Langmuir monolayers of gramicidin A and fluorinated alcohols.
J Colloid Interface Sci 2007;
313:600-7. [PMID:
17540396 DOI:
10.1016/j.jcis.2007.04.060]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2006] [Revised: 04/11/2007] [Accepted: 04/26/2007] [Indexed: 10/23/2022]
Abstract
Mixed monolayers of gramicidin A (GA) and three alcohols, differing in the degree of fluorination, namely C18OH, F18OH, and F8H10OH have been investigated by means of: surface manometry (pi-A isotherms) and Brewster angle microscopy (BAM) aiming at finding appropriate molecules for incorporating gramicidin A for a biosensor design. Our results proved that only the semifluorinated alcohol is appropriate material for this purpose since it forms miscible and homogeneous monolayers with GA within the whole concentration range. The experimental results have been supported by the calculations of van der Waals energy profiles using the Insight II program. Both the hydrogenated and perfluorinated alcohols were found to aggregate at higher surface pressures, which exclude their application for gramicidin-based biosensor construction.
Collapse