Ph. D. THESIS 2009
Ph. D. THESIS 2009
Ph. D. THESIS 2009
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the power as parameter exhibits a major influence among the double-line<br />
characteristics. Vertical line is wider and broader than the horizontal ones by<br />
almost a factor two due to the laser power used-120 instead 80 mW.<br />
Z[nm]<br />
500<br />
400<br />
300<br />
200<br />
100<br />
0<br />
0 1 2 3 4 5 6<br />
X[µm]<br />
13<br />
120 mW<br />
a b c<br />
Figure 18. AFM measurements of typical gold wires for two different powers<br />
80 mW<br />
A top view is shown in Figure 18a and the cross-section plotted along them at<br />
the centre, in Figure 18b. Each metallic wire has a full width at half maximum<br />
of 600 nm with a height of 500 nm, whereas distance between lines records a<br />
considerable increase at the bigger laser power. All experimental data are in<br />
good agreament with the prior predicted behaviour of double wire generation.<br />
A 3D view is shown on the right images of Figure 18c). As it can be seen<br />
regular and continuous metallic wires can be fabricate, their walls being almost<br />
vertical.<br />
4.3.3.2. The substrate<br />
To complete this study, we investigated the influence of the substrate nature<br />
among the double wire characteristics. Additionally, was analyzed the<br />
regularity wires shape and the fixing of the metallic deposition on the sample<br />
surface after the unreacted matrix removal.<br />
Thin solid films were prepared by spin-coating first directly onto glass<br />
substrate.<br />
a b