Microfabrication of polystyrene microbead arrays by laser induced forward transfer

In this study we describe a simple method to fabricate microarrays of polystyrene microbeads (PS- μ beads ) on Thermanox coverslip surfaces using laser induced forward transfer (LIFT). A triazene polymer layer which acts as a dynamic release layer and propels the closely packed microspheres on the r...

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Bibliographic Details
Published in:Journal of applied physics 2010-08, Vol.108 (3), p.033111-033111-6
Main Authors: Palla-Papavlu, Alexandra, Dinca, Valentina, Paraico, Iurie, Moldovan, Antoniu, Shaw-Stewart, James, Schneider, Christof W., Kovacs, Eugenia, Lippert, Thomas, Dinescu, Maria
Format: Article
Language:English
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Summary:In this study we describe a simple method to fabricate microarrays of polystyrene microbeads (PS- μ beads ) on Thermanox coverslip surfaces using laser induced forward transfer (LIFT). A triazene polymer layer which acts as a dynamic release layer and propels the closely packed microspheres on the receiving substrate was used for this approach. The deposited features were characterized by optical microscopy, scanning electron microscopy, atomic force microscopy, and Raman spectroscopy. Ultrasonication was used to test the adherence of the transferred beads. In addition, the laser ejection of the PS- μ bead pixels was investigated by time resolved shadowgraphy. It was found that stable PS- μ beads micropatterns without any specific immobilization process could be realized by LIFT. These results highlight the increasing role of LIFT in the development of biomaterials, drug delivery, and tissue engineering.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.3466746