Thermoactuated diffusion control in soft matter nanofluidic devices
Artikel i vetenskaplig tidskrift, 2008

The diffusive transport rate in a soft matter nanofluidic device is controlled with a thermoactuated hydrogel valve. The device consists of three giant unilamellar vesicles linearly conjugated by lipid nanotubes, with a solution of the stimuli-responsive polymer poly(N-isopropyl acrylamide) (PNIPAAm) in the central vesicle. The valve states "high (transport) rate" and "low (transport) rate" are obtained by heat-activated switching between PNIPAAm's dissolved and compact aggregated states. We show that three parameters influence the diffusion rate within the device: the increase of the transport rate caused by a decrease in PNIPAAm concentration upon compaction, the temperature dependence of the buffer viscosity, and the volume excluded by the PNIPAAm hydrogel compartment. © 2008 American Chemical Society.


Martin Markstrom


Ludvig Lizana

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Owe Orwar

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Aldo Jesorka

Chalmers, Kemi- och bioteknik, Fysikalisk kemi


07437463 (ISSN) 15205827 (eISSN)

Vol. 24 9 5166-5171





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