Abstract
In this study, the soot with arbitrary wettability was simply prepared by a deposition process using flaming ethanol. Both superhydrophobic and super-hydrophilic soot samples were obtained simultaneously on the substrate and were concentrically distributed around the flame core as the center. It was not the length of the carbon chain residue but the difference in the particle size of carbon nanoparticles that determined the wettability of different soot samples. Small carbon particles generated within the sufficiently combustion zone of the flame resulted in superhydrophilicity, while large carbon particles formed in the insufficient combustion zone resulted in super-hydrophobicity. The obtained super-wetted soot exhibited excellent stability in air and water and at high temperature. This study reveals a facile method to prepare a controllable, durable, and stable superwetting surface with high temperature and corrosion resistance by depositing such superwetting soot on an arbitrary solid surface.
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