The wetting behavior of TiO2 nanotube arrays with perfluorinated surface functionalization

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Proceedings titleASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
ConferenceASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014, 14 November 2014 through 20 November 2014
SubjectContact angle; Liquids; Titanium dioxide; Wetting; Electro-chemical anodization; Functionalized nanotubes; Functionalized tio; Nonpolar liquids; Static contact angle; Surface Functionalization; Transition state; Wetting behavior; Nanotubes
AbstractA facile electrochemical anodization method was used for producing hierarchically textured surfaces based on TiO2 nanotubes in two different configurations. It was found that perfluoro-functionalized TiO2 nanotubes exhibit high static contact angles for a variety of liquids such as apolar, polar aprotic and polar protic solvents. Wenzel and Cassie-Baxter theories were applied for theoretical contact angle calculations for the present study. By using Cassie theories, it is shown that a drop of polar liquid was in a fakir or Cassie-Baxter (CB) state on perfluoro-functionalized nanotube surfaces. The fakir state prevents spreading of the liquid on the surface. On the other hand, the wetting of non-polar liquids such as hexane is characterized by either Wenzel states or transition states characterized by partial imbibition that lie in between the CB and Wenzel states.
Publication date
PublisherAmerican Society of Mechanical Engineers
AffiliationNational Research Council Canada (NRC-CNRC); National Institute for Nanotechnology
Peer reviewedYes
NPARC number21275570
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Record identifierc566f8a1-790f-4485-8fe5-00951345e6c9
Record created2015-07-14
Record modified2016-05-09
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