Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-01-13
Pap. Phys. 1, 010008 (2009)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
10 pages, 8 figures
Scientific paper
10.4279/pip.010008
A nanopatterning scheme is presented by which the structure height can be controlled in the tens of nanometers range and the lateral resolution is a factor at least three times better than the point spread function of the writing beam. The method relies on the initiation of the polymerization mediated by a very inefficient energy transfer from a fluorescent dye molecule after single photon absorption. The mechanism has the following distinctive steps: the dye adsorbs on the substrate surface with a higher concentration than in the bulk, upon illumination it triggers the polymerization, then isolated islands develop and merge into a uniform structure (percolation), which subsequently grows until the illumination is interrupted. This percolation mechanism has a threshold that introduces the needed nonlinearity for the fabrication of structures beyond the diffraction limit.
Kunik D.
Martínez O. E.
Pietrasanta L. I.
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