Abstract
We report first the wetting transition from superhydrophobicity to superhydrophilicity observed on nitrogen and air plasma irradiated biological tissue (pigeon feathers). Non-irradiated feathers demonstrate pronounced Cassie-Baxter (" fakir" ) wetting characterized by high apparent contact angles and low sliding angles. Plasma-irradiated feathers are superhydrophilic. Plasma treatment does not affect the barbs/barbules keratin-built network constituting pigeon pennae, but it changes the Young, advancing and receding angles of the tissue. The mechanism of wetting transition is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 367-371 |
| Number of pages | 5 |
| Journal | Colloids and Surfaces B: Biointerfaces |
| Volume | 92 |
| DOIs | |
| State | Published - 1 Apr 2012 |
Keywords
- Air and nitrogen plasma
- Contact angle
- Keratin
- Pigeon feather
- Wetting properties
- Wetting transition
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