Molecular imaging of slip in entangled DNA solution.
This work obtains the first molecular imaging of wall slip in entangled solutions. Using a combination of confocal fluorescence microscopy and rheometry, molecular images were captured in the nonlinear response regime of entangled DNA solutions. Conformations of DNA molecules were imaged during shear to correlate with the magnitude of wall slip. Interfacial chain disentanglement results in wall slip beyond the stress overshoot. Sufficient disentanglement can produce tumbling of individual DNA in the entangled solutions.
Boukany
Pouyan E
PE
Nanoscale Science and Engineering Center for Affordable Nanoengineering of Polymeric Biomedical Devices, The Ohio State University, Columbus, Ohio 43210, USA.
Hemminger
Orin
O
Wang
Shi-Qing
SQ
Lee
L J
LJ
D004247:DNA / Q000737:chemistry* / Q000648:ultrastructure*; D007089:Image Enhancement; D044085:Microfluidics; D018613:Microscopy, Confocal; D008856:Microscopy, Fluorescence; D009690:Nucleic Acid Conformation; D033081:Shear Strength / Q000502:physiology; D012996:Solutions / Q000737:chemistry
D012996:Solutions; D004247:DNA