TY - GEN
T1 - Suspended polymer nanofiber arrays of long range order fabricated by manual brush-on
AU - Harfenist, Steven A.
AU - Olaleye, Timilihen
AU - Berry, Scott M.
AU - Keynton, Robert S.
AU - Cohn, Robert W.
PY - 2005
Y1 - 2005
N2 - A single bead of liquid polymer (suspended in a volatile solvent) applied to the edge of a microscope cover slip when dragged over a textured surface will self-assembled into parallel oriented fibers of micron and even nanoscale dimensions. Fibers as small as 30 nm that are suspended in air between pillars have been produced this way. Previous results are extended by the report of long range order and uniformity of a brushed on fiber polymer network. The textured surface is an array of pillars that were produced by saw cuts into a glass substrate. The liquid polymer is 50,000 Mw (poly) vinyl acetate in acetone. The fibers form in the direction of the applicator motion. Strong wetting to the pillars is seen with a small amount of solidified polymer remaining between the pillars. Surface tension driven capillary thinning drove large amounts of polymer from the bridge area to the pillars. The AFM measurements of mineral oils and polymers in non-volatile solvents show that reproducible measurements are possible of capillary breakup. This is shown in the force-distance curves for mineral oil. Similar results in the 5 to 100 nN levels have been observed with comparable reproducibility for several polymers in non-volatile solvents. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).
AB - A single bead of liquid polymer (suspended in a volatile solvent) applied to the edge of a microscope cover slip when dragged over a textured surface will self-assembled into parallel oriented fibers of micron and even nanoscale dimensions. Fibers as small as 30 nm that are suspended in air between pillars have been produced this way. Previous results are extended by the report of long range order and uniformity of a brushed on fiber polymer network. The textured surface is an array of pillars that were produced by saw cuts into a glass substrate. The liquid polymer is 50,000 Mw (poly) vinyl acetate in acetone. The fibers form in the direction of the applicator motion. Strong wetting to the pillars is seen with a small amount of solidified polymer remaining between the pillars. Surface tension driven capillary thinning drove large amounts of polymer from the bridge area to the pillars. The AFM measurements of mineral oils and polymers in non-volatile solvents show that reproducible measurements are possible of capillary breakup. This is shown in the force-distance curves for mineral oil. Similar results in the 5 to 100 nN levels have been observed with comparable reproducibility for several polymers in non-volatile solvents. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).
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M3 - Conference contribution
AN - SCOPUS:33646741296
SN - 0816909962
SN - 9780816909964
T3 - AIChE Annual Meeting Conference Proceedings
BT - 05AIChE
T2 - 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
Y2 - 30 October 2005 through 4 November 2005
ER -