Anatoli V. Melechko
Controlled transport of latex beads through vertically aligned carbon nanofiber membranes
Zhang, L., A.V. Melechko, V.I. Merkulov, M.A. Guillorn, M.L. Simpson, D.H. Lowndes, and M.J. Doktycz
Applied Physics Letters, 2002. 81(1): p. 135-137
Stripes of vertically aligned carbon nanofibers
(VACNFs) have been used to form membranes for size
selectively controlling the transport of latex beads.
Fluidic structures were created in poly(dimethylsiloxane) (PDMS)
and interfaced to the VACNF structures for
characterization of the membrane pore size. Solutions
of fluorescently labeled latex beads were introduced into
the PDMS channels and characterized by fluorescence and
scanning electron microscopy. Results show that the
beads size selectively pass through the nanofiber
barriers and the size restriction limit correlates with
the interfiber spacing. The results suggest that altering
VACNF array density can alter fractionation
properties of the membrane. Such membranes may be
useful for molecular sorting and for mimicking the
properties of natural membranes. ©2002 American Institute of
Physics.
The following article appeared in Applied Physics Letters, 2002. 81(1): p. 135-137. and may be found at (http://link.aip.org/link/?APPLAB/81/135/1).
Copyright (2002) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.