| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 74295 | Microporous and Mesoporous Materials | 2011 | 6 Pages |
Effect of nanomechanical properties of un-annealed TiO2 nanotubes and those annealed at different temperatures prepared by electrochemical anodization growth is investigated. The characteristics include the growth mechanism, contact angle, nanoindentation load, and photoluminescence (PL) and X-ray diffraction (XRD) spectra. Results show that the morphologies of the nanotubes exhibit nearly regular vertical alignment when the anodization time is over 90 min. The TiO2 nanotubes tapered off to a point and had ripples in their side walls. TiO2 nanotube surfaces possess a hydrophilic phenomenon and the contact angle decreased with increasing electrochemical anodization time. A hysteresis loop during nanoindentation load–unload was observed, indicating that the nanotube surface has elastic energy dissipation. The Young’s modulus increased with increasing annealing temperature. The intensities of PL increased with increasing annealing temperature. Un-annealed and annealed TiO2 nanotubes dominate the hardness property and potential mechanically stable.
Graphical abstractEffect of nanomechanical properties of un-annealed TiO2 nanotubes and those annealed at different temperatures prepared by electrochemical anodization growth is investigated. TiO2 nanotube surfaces possess a hydrophilic phenomenon and the contact angle decreased with increasing electrochemical anodization time. A hysteresis loop during nanoindentation load-unload was observed, indicating that the nanotube surface has elastic energy dissipation.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We investigated the nanomechanical characteristics and growth mechanisms of electrochemical anodization of TiO2 nanotubes. ► The effects of the growth mechanism, the contact angle, the nanoindentation load, and PL and XRD spectra. ► TiO2 nanotubes after annealing over 400 °C display super hydrophilic characteristics. ► The hardness array of TiO2 nanotubes increased with increasing annealed temperature.
