Journal
NANO LETTERS
Volume 6, Issue 3, Pages 543-547Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl052372h
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Electrostatic interactions dominate the diffusion of proteins in a nanochannel, which was measured and modeled for pH values above and below the isoelectric points of three lectin proteins. Maximal diffusion coefficients were obtained when the proteins were neutral at their pl. This pH-controlled transport led to a separation of biomolecules across the nanochannel. A pl shift was observed, due to reversible adsorption of proteins on the walls, which affects the pH in the nanochannel.
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