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Proceedings Paper

Rapid fabrication of biocompatible hydrogels microdevices using laser interference lithography
Author(s): Andrés Lasagni; Dajun Yuan; Peng Shao; Suman Das
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Paper Abstract

We report on fabrication of periodic arrays of polyethylene glycol diacrylate (PEG-DA), a biocompatible hydrogel, useful in biomedical applications. The structures were produced by means of multi beam laser interference lithography with both nanosecond (266 and 355 nm of wavelengths with pulses lasting 10 ns) and femtosecond pulsed lasers (800 nm of wavelength and 90 fs laser pulses). Configurations involving two, four and five laser beams were utilized obtaining a wide variety of patterns with different feature sizes in the micrometer scale. Through this technique, we demonstrated the ability to fabricate high feature density patterns over large areas without the use of templates or masks. In addition, resolution and geometrical characteristic of the periodic arrays are discussed as function of pulse duration and laser processing parameters. The photopolymerization nature of the process was also investigated.

Paper Details

Date Published: 20 May 2009
PDF: 9 pages
Proc. SPIE 7365, Bioengineered and Bioinspired Systems IV, 73650I (20 May 2009); doi: 10.1117/12.821099
Show Author Affiliations
Andrés Lasagni, Georgia Institute of Technology (United States)
Fraunhofer-Institut für Werkstoff- und Strahltechnik (Germany)
Dajun Yuan, Georgia Institute of Technology (United States)
Peng Shao, Georgia Institute of Technology (United States)
Suman Das, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 7365:
Bioengineered and Bioinspired Systems IV
Ángel B. Rodríguez-Vázquez, Editor(s)

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