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View/Open - ARAN - National University of Ireland, Galway

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Chapter 2<br />

2.6.10. Atomic Force Microscopy<br />

The results <strong>of</strong> Atomic Force Microscopy (AFM) analysis indicate that there<br />

was a large difference in the surface roughness <strong>of</strong> the 5 surfaces. The<br />

results indicated that glass was the least rough surface (3.31±0.35)<br />

followed by tile (5.33±2.10), steel (20.28±6.80), polycarbonate<br />

(110.40±73.89) and concrete (288.60±129.79). As displayed in Figure 2.7<br />

based the mean surface roughness measurements (measured in<br />

nanometres) and the mean log 10 density <strong>of</strong> bi<strong>of</strong>ilm recovered from the<br />

surface (taken from Table 2.6) the surface roughness may contribute to the<br />

density <strong>of</strong> bi<strong>of</strong>ilm attached to 4 <strong>of</strong> the 5 surfaces. However, tile was the 2 nd<br />

least rough surface but had the most dense bi<strong>of</strong>ilm attached to the surface<br />

for all strains and repeated experiments.<br />

Page 82

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