Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 217, Issue -, Pages 111-116Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2018.06.043
Keywords
Chemical vapor deposition (CVD); Catalyst-free preparation; Silicon carbide/silica; Bead-string like structure; Hydrophobicity
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Funding
- Foundation of Lanzhou Institute of Chemical Physics
- National Natural Science Foundation of China [51772060, 51672059, 51621091, 51372052, 51021002]
- Scientific research project of Liaoning Provincial Education Department [LJCL007]
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Novel SiC/SiO2 bead-string like core-shell nanochains have been fabricated via a thermal chemical vapor deposition process without using any catalysts and templates. These SiC/SiO2 bead-string like core-shell nanochains are made up of SiO2 spheres as beads and SiC/SiO2 core-shell nanowires as strings, respectively. A Vapor-Solid growth mechanism is proposed to explain the formation of these SiC/SiO2 hetero-nanostructures in the absence of catalysts on the basis of the characterization results, the possible reactions among the solid phases, intermediate gas phases and surface energy minimization. Moreover, these SiO2-SiC bead-string like nanochains exhibit good hydrophobicity with a water contact angle over 140 degrees, which is caused by the special surface composition. This hydrophobicity makes these SiO2-SiC bead-string like nanochains promising candidates as surface protective or self-cleaning materials in harsh environments.
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