Surface-wetting effects on the liquid–liquid transition of a single-component molecular liquid

Ken-ichiro Murata and Hajime Tanaka ()
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Ken-ichiro Murata: Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku
Hajime Tanaka: Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku

Nature Communications, 2010, vol. 1, issue 1, 1-9

Abstract: Abstract Even a single-component liquid may have more than two liquid states. The transition between them is called a 'liquid–liquid transition' (LLT). Such LLTs have recently attracted considerable attention mainly because of the fundamental interest in the physical origin of this counter-intuitive phenomenon. In this study, we report the first observation of wetting effects on LLT for a molecular liquid, triphenyl phosphite. We find a transition from partial to complete wetting for nucleation-growth-type LLT when approaching the spinodal temperature of LLT. Some features unique to LLT are also revealed, reflecting for example the non-conserved nature of its order parameter. We also find that the wetting behaviour is not induced by dispersion forces, but by weak hydrogen bonding to a solid substrate, implying its important role in the LLT itself. Using wetting effects may open a new possibility to control kinetics and spatial patterns of nucleation-growth-type LLT.

Date: 2010
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DOI: 10.1038/ncomms1015

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