The influence of surface wettability on the adhesion strength of settled spores of the green alga enteromorpha and the diatom amphora |
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| Authors: | Finlay John A Callow Maureen E Ista Linnea K Lopez Gabriel P Callow James A |
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| Affiliation: | 1 School of Biosciences, University of Birmingham, Birmingham B15 2TT, UK
2 Department of Chemical and Nuclear Engineering, The University of New Mexico, Albuquerque, New Mexico 87131 |
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| Abstract: | In this paper we report on the effect of surface wettabilityon surface selection and adhesion properties of settled (adhered)spores of the biofouling marine alga Enteromorpha and cellsof the diatom Amphora, through the use of patterned self-assembledmonolayers (SAMs). The SAMs were formed from alkanethiols terminatedwith methyl (CH3) or hydroxyl (OH) groups, or mixtures of thetwo, creating a discontinuous gradient of wettability as measuredby advancing water contact angle. In the case of Enteromorpha,primary adhesion, as measured by the transition from a motilespore to a settled, sessile organism, is strongly promoted bythe hydrophobic surfaces. On the other hand, adhesion strengthof the settled spores, as measured by resistance to detachmentin a turbulent flow cell, is greatest on a hydrophilic surface.In the case of Amphora, there is little influence of surfacewettability on the primary adhesion of this organism, but motilityis inhibited at contact angles |
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