Journal
NANOTECHNOLOGY
Volume 20, Issue 21, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/21/215605
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Funding
- Natural Science Foundation of China [50572093, 30870627]
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This work presents a facile way, i.e. phase-separation-induced self-assembly, to prepare TiO2 nanodots on a substrate. This method induces convective flow in a spin-coated titanium tetrabutoxide (TBOT)/polyvinyl pyrrolidone (PVP)/ethanol liquid film through the Marangoni effect and turns TBOT into crystalline TiO2 nanodots on a substrate after calcination. The size and density of the TiO2 nanodots can be finely tailored by controlling the concentrations of TBOT and PVP in the precursor sol. The TiO2 nanodot-deposited surface showed a hydrophilic characteristic and the wettability was obviously improved by increasing nanodot size.
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