Ph. D. THESIS 2009
Ph. D. THESIS 2009
Ph. D. THESIS 2009
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
mW and gold salt concentration of 2.510 -5 M proved to yield the best quality of<br />
the structures.<br />
4.5.1 Nanodots<br />
Instead of lines it is possible to obtain dots when the laser spot is not moved<br />
during the fabrication but remains at the same place.<br />
Figure 24 shows typical AFM measurements for a single nanodot, here with<br />
350 nm diameter and 119 nm heights. It has been fabricated at 25 mW laser<br />
power, with an exposure time of 5s and a gold salt concentration of 2.5·10 -5 M.<br />
a b c<br />
Figure 24. A gold nanodot fabricated at low laser power and gold concentration:<br />
a) top-view; b) 3D view; c) cross-section<br />
4.5.2. Single wires<br />
Figure 25(a) presents a serie of gold lines, fabricated in fresh thick film, with<br />
respect to “optimum” conditions presented above.<br />
a b<br />
Figure 25. Optical images of one-single gold wires deposited in thick film,<br />
recorded in transmitted light: (a) in polymer matrix; (b) surrounded by air,<br />
after washing process.<br />
16