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TitleContamination of PDMS microchannels by lithographic molds
Publication TypeJournal Article
Year of Publication2013
AuthorsBubendorfer, A., Ingham B., Kennedy J.V., and Arnold W.M.
JournalLab on a Chip - Miniaturisation for Chemistry and Biology
Pagination4312 - 4316
Date Published2013
ISSN14730197 (ISSN)
Keywordsantimony, article, contamination, Dimethylpolysiloxanes, dimeticone, Electroosmotic flow, Microfluidic Analytical Techniques, microfluidics, osmosis, photoinitiator, priority journal, Rutherford backscattering spectrometry, Spectrometry, Surface properties, surface property, synchrotron, X ray fluorescence
AbstractBy use of synchrotron X-ray fluorescence and Rutherford backscattering spectrometry, we show the SU-8 soft lithographic process contaminates PDMS. Residues of the antimony containing photoinitiator are transferred from the master mold to the surface of PDMS, uncontrollably intensifying the surface potential, leading to electroosmotic flow variability in PDMS microfluidic devices. © 2013 The Royal Society of Chemistry.

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