Ph. D. THESIS 2009

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