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  • Hierarchically structured superoleophobic surfaces with ultralow contact angle hysteresis.

Hierarchically structured superoleophobic surfaces with ultralow contact angle hysteresis.

Advanced materials (Deerfield Beach, Fla.) (2012-08-30)
Arun K Kota, Yongxin Li, Joseph M Mabry, Anish Tuteja
ABSTRACT

Hierarchically structured, superoleophobic surfaces are demonstrated that display one of the lowest contact angle hysteresis values ever reported - even with extremely low-surface-tension liquids such as n-heptane. Consequently, these surfaces allow, for the first time, even ≈2 μL n-heptane droplets to bounce and roll-off at tilt angles. ≤ 2°.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Heptane, biotech. grade, ≥99%
Sigma-Aldrich
Heptane, anhydrous, 99%
Supelco
Heptane, analytical standard
Sigma-Aldrich
Heptane, puriss. p.a., reag. Ph. Eur., ≥99% n-heptane basis (GC)
Sigma-Aldrich
Heptane, ReagentPlus®, 99%
Sigma-Aldrich
Heptane, HPLC Plus, for HPLC, GC, and residue analysis, 99%
Sigma-Aldrich
Heptane, suitable for HPLC, ≥99%
Sigma-Aldrich
Heptane, suitable for HPLC, ≥96%