Ph. D. THESIS 2009

mW and gold salt concentration of 2.510 -5 M proved to yield the best quality of
the structures.
4.5.1 Nanodots
Instead of lines it is possible to obtain dots when the laser spot is not moved
during the fabrication but remains at the same place.
Figure 24 shows typical AFM measurements for a single nanodot, here with
350 nm diameter and 119 nm heights. It has been fabricated at 25 mW laser
power, with an exposure time of 5s and a gold salt concentration of 2.5·10 -5 M.
a b c
Figure 24. A gold nanodot fabricated at low laser power and gold concentration:
a) top-view; b) 3D view; c) cross-section
4.5.2. Single wires
Figure 25(a) presents a serie of gold lines, fabricated in fresh thick film, with
respect to “optimum” conditions presented above.
a b
Figure 25. Optical images of one-single gold wires deposited in thick film,
recorded in transmitted light: (a) in polymer matrix; (b) surrounded by air,
after washing process.
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