Journal
LAB ON A CHIP
Volume 13, Issue 22, Pages 4312-4316Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3lc50641j
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- MSI/MBIE [C08X0806]
- New Zealand Synchotron Group
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By 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.
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