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Electroosmotic flow (EOF) velocity in single PDMS nanochannels with a dimension as small as 20 nm is investigated systematically by the current slope method in this paper. A novel method for fabrication of single nanochannels on PDMS surfaces is developed. The effects of channel size, ionic concentration of electrolyte solution and electric field on the EOF velocity in single nanochannels are investigated. The results show that EOF velocity in smaller nanochannels with overlapped electricdoi:10.1039/c6nr02937j pmid:27256765 fatcat:ghopkedycvedhb6322nwxcnhbe