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Journal Article

Nanopatterning by biological templating and laser direct writing in thin laser deposited films

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Gorbunov, A. A., Mertig, M., Kirsch, R., Eichler, H., Pompe, W., & Engelhardt, H. (1997). Nanopatterning by biological templating and laser direct writing in thin laser deposited films. Applied Surface Science, 110, 621-625.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0010-72A2-E
Abstract
We report on three alternative approaches to laser-supported sub-micro- and nanopatterning of ultrathin films. The inherent non-linearities of direct writing techniques can be used to fabricate structures far below the optical resolution limit. Due to the non-linear dependence of light absorption and reaction rate on film thickness and temperature (a) the lateral self-limitation of the oxidation reaction in ultrathin titanium films on a transparent heat insulating substrate in air can occur. The polarization of sharp conducting tips results in (b) near-field enhancement of the optical field in nanometer regions that allows diminishing of the effective size of the radiation source. The third approach (c) is based on the nanometer-period pattern transfer from a biomolecular template to a Pt/C overlayer deposited by cross-beam pulsed laser deposition. [References: 14]