Journal
BIOFOULING
Volume 32, Issue 4, Pages 383-395Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/08927014.2016.1146256
Keywords
Zinc oxide; biofilms; nanorod coating; photocatalysis; mesocosm; MiSeq sequencing
Funding
- Chair in Nanotechnology, The Research council (TRC)
- The Research Council (TRC) [RC/AGR/FISH/16/01]
- internal SQU [IG/AGR/FISH/15/02]
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The antifouling (AF) properties of zinc oxide (ZnO) nanorod coated glass substrata were investigated in an out-door mesocosm experiment under natural sunlight (14:10 light: dark photoperiod) over a period of five days. The total bacterial density (a six-fold reduction) and viability (a three-fold reduction) was significantly reduced by nanocoatings in the presence of sunlight. In the absence of sunlight, coated and control substrata were colonized equally by bacteria. MiSeq Illumina sequencing of 16S rRNA genes revealed distinct bacterial communities on the nanocoated and control substrata in the presence and absence of light. Diatom communities also varied on nanocoated substrata in the presence and the absence of light. The observed AF activity of the ZnO nanocoatings is attributed to the formation of reactive oxygen species (ROS) through photocatalysis in the presence of sunlight. These nanocoatings are a significant step towards the production of an environmentally friendly AF coating that utilizes a sustainable supply of sunlight.
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