Electrophoretic deposition of titanate nanotube films with extremely large wetting contrast

Highly ordered sodium-free titanate nanotube films were one-step prepared on F-doped SnO2-coated (FTO) glass via an electrophoretic deposition method by using sodium titanate nanotubes as the precursor. It was found that the self-assembled formation of highly ordered sodium titanate nanotube films was accompanied with the effective removal of sodium ions in the nanotubes during the electrophoretic deposition process, resulting in the final formation of protonated titanate nanotube film. With increasing calcination temperature, the amorphous TiO2phase is formed by a dehydration process of the protonated titanate nanotubes at 300°C and further transforms into anatase TiO2when the calcination temperature is higher than 400°C. Compared with the as-prepared titanate nanotube film, the calcined titanate nanotube film (300–600°C) exhibits attractive photoinduced superhydrophilicity under UV-light irradiation. In particular, 500°C-calcined films show the best photoinduced superhydrophilicity, probably due to synergetic effects of enhanced crystallization, surface roughness, and ordered structures of the films.

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Dye-sensitized solar cells based on ordered titanate nanotube films fabricated by electrophoretic deposition method

Electrochemistry Communications ◽

10.1016/j.elecom.2009.08.050 ◽

2009 ◽

Vol 11 (10) ◽

pp. 2052-2055 ◽

Cited By ~ 82

Author(s):

Li Zhao ◽

Jiaguo Yu ◽

Jiajie Fan ◽

Pengcheng Zhai ◽

Shiming Wang

Keyword(s):

Solar Cells ◽

Electrophoretic Deposition ◽

Dye Sensitized Solar Cells ◽

Deposition Method ◽

Titanate Nanotube ◽

Dye Sensitized ◽

Sensitized Solar Cells ◽

Nanotube Films

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Electrophoretic Deposition of Single Wall Carbon Nanotube Films and Characterization

MRS Proceedings ◽

10.1557/opl.2014.960 ◽

2014 ◽

Vol 1752 ◽

pp. 59-63

Author(s):

Junyoung Lim ◽

Maryam Jalali ◽

Stephen A. Campbell

Keyword(s):

Carbon Nanotube ◽

Film Thickness ◽

Young’S Modulus ◽

Electrophoretic Deposition ◽

Flexible Electronics ◽

Rutherford Backscattering Spectrometry ◽

Young's Modulus ◽

Single Wall Carbon Nanotube ◽

Single Wall Carbon ◽

Nanotube Films

ABSTRACTElectrophoretic deposition enables the rapid deposition of single wall carbon nanotube films at room temperature. An accurate, reproducible film thickness can be obtained by controlling electric field strength, suspension concentration, and time. To investigate the electrical and mechanical properties of such films, we recorded electric resistance and Young’s modulus using I-V characterization and a nanoindenter, respectively. The measured resistivity of the films varied from 2.14 × 10-3 to 7.66 × 10-3 Ω·cm, and the Young’s modulus was 4.72 to 5.67 GPa, independent of film thickness from 77 to 134 nm. These results indicated that the mechanical and electrical properties of film are comparable with previously reported methods such as layer by layer deposition even though we achieved much higher deposition rates. We also measured the film mass density which is usually unrecorded even though it is an important parameter for MEMS/NEMS device actuation. The film density was found with conventional thickness measurement and Rutherford backscattering spectrometry. It varied from 0.12 to 0.54 g/cm3 as the film thickness increased. This method could be extended to applications of CNT films for flexible electronics or high frequency RF MEMS devices.

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