* **20 Feb. 2005 - SEM pictures of nano-lith crosses in resist**
//The sample is a developed double-layer PMGI-PMMA on Si/SiO2. First exposure were the crosses (small middle structures), second - the contact pads. And although I thought I did the write field alignment right this time, there is still some 20-30 micron mismatch between the cross and the pads :-( // \\
{{ag2s:cross_lb_1.jpg?200}}
{{ag2s:cross_lb_2.jpg?200}}
{{ag2s:cross_rb_1.jpg?200}}
{{ag2s:cross_rb_2.jpg?200}}
{{ag2s:cross_lo_1.jpg?200}}
{{ag2s:cross_lo_2.jpg?200}}
{{ag2s:lines_lo_1.jpg?200}}
{{ag2s:ilse_lo.jpg?200}}
{{ag2s:cross_ro_1.jpg?200}}
{{ag2s:cross_ro_2.jpg?200}}
{{ag2s:ilse_ro.jpg?200}}




  * **15 Feb. 2005 - SEM pictures of nano-lith crosses in resist**
//The sample is a developed single-layer PMMA on Si/SiO2. First exposure were the crosses (small middle structures), second - the contact pads (which did not work out because we forgot to change the magnification :-( )// \\
{{ag2s:cross_electrode_gap1.jpg?200}}
{{ag2s:cross_electrode_gap2.jpg?200}}
{{ag2s:cross_electrode_gap3_30kv_.jpg?200}}
{{ag2s:cross_zoomout1.jpg?200}}
{{ag2s:silpverpaint_bigdrop.jpg?200}}
{{ag2s:silpverpaint_tinydrop1.jpg?200}}
{{ag2s:silpverpaint_tinydrop2.jpg?200}}
{{ag2s:silver_paint1.jpg?200}}
{{ag2s:silver_paint2.jpg?200}}
{{ag2s:xlinked_pmma_corner1.jpg?200}}
{{ag2s:xlinked_pmma_corner2.jpg?200}} \\
-Alex

  * **27 Jan. 2005 - SEM pictures of cross-bars and silverpaint**

{{ag2s:crossbar_large.bmp}} - The horizontal bar is a bottom electrode of Au (it ends left of the crossing). On top of that is a uniform layer of Ag2S and finally the vertical bar which is Ag. Apparently, the silver tends to cluster in 'cones', which will be visible more clearly in the following pictures; this explains the infinite resistance of the bar. For some reason there are no cones on top of the gold. Note also the silver cones along the sides of the gold bar (where there should be no silver).

{{ag2s:crossbar.bmp}} - Closeup of the same crossing (approx. 300x300 micron). The silver cones seem to penetrate over a certain distance into the area above the gold bar (which is the bottom half of the picture).

{{ag2s:silver_zoomed.bmp}} - Image of an area somewhere in the middle of what used to be a silverbar (approx. 50x50 micron). Note the cone shape of the dots.

{{ag2s:silver_zoomed2.bmp}} - Similar as previous picture, but this time with indication of scale.

{{ag2s:cones.bmp}} - Closeup of two cones (approx. 10x10 micron). The square shape is caused by scanning that area for some time. It gives a better impression of what the surface looks like than the region outside the square. 

{{ag2s:silverpaint_middle.bmp}} - Impression of the structure of a silverpaint drop (somewhere in the middle of the drop, approx. 20x20 micron).

{{ag2s:silverpaint_middle2.bmp}} - Again, less sharp but with scale legend.

{{ag2s:silverpaint_edge.bmp}} - This is the edge of the silverpaint drop (approx. 20x20 micron). Left is bare Ag2S. The dark area might be caused by the organic stuff the paint is made of.

{{ag2s:silverpaint_edge2.bmp}} - Idem.

{{ag2s:silverpaint_flake.bmp}} - Closeup of a single silverpaint flake (top left of previous picture 8-) ).

Darko & Sander