Surface Functionalization of Grown-on-Tip ZnO Nanopyramids: From Fabrication to Light-Triggered Applications

Alberto Gasparotto, Chiara Maccato, Giorgio Carraro, Cinzia Sada, Urska Lavrencic Stangar, Bruno Alessi, Conor Rocks, Davide Mariotti, Andrea La Porta, Thomas Altantzis, Davide Barreca

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We report on a combined chemical vapor deposition (CVD)/radio frequency (RF) sputtering synthetic strategy for the controlled surface modification of ZnO nanostructures by Ti-containing species. Specifically, the proposed approach consists in the CVD of grown-on-tip ZnO nanopyramids, followed by titanium RF sputtering under mild conditions. The results obtained by a thorough characterization demonstrate the successful ZnO surface functionalization with dispersed Ti-containing species in low amounts. This phenomenon, in turn, yields a remarkable enhancement of photoactivated superhydrophilic behavior, self-cleaning ability, and photocatalytic performances in comparison to bare ZnO. The reasons accounting for such an improvement are unravelled by a multitechnique analysis, elucidating the interplay between material chemico-physical properties and the corresponding functional behavior. Overall, the proposed strategy stands as an amenable tool for the mastering of semiconductor-based functional nanoarchitectures through ad hoc engineering of the system surface.

LanguageEnglish
Pages15881-15890
Number of pages10
JournalACS Applied Materials & Interfaces
Volume11
Issue number17
Early online date18 Apr 2019
DOIs
Publication statusPublished - 1 May 2019

Fingerprint

Sputtering
Chemical vapor deposition
Fabrication
Titanium
Surface treatment
Cleaning
Nanostructures
Physical properties
Semiconductor materials

Keywords

  • ZnO-based nanomaterials
  • photocatalysis
  • photoinduced superhydrophilicity
  • self-cleaning
  • surface engineering

Cite this

Gasparotto, Alberto ; Maccato, Chiara ; Carraro, Giorgio ; Sada, Cinzia ; Lavrencic Stangar, Urska ; Alessi, Bruno ; Rocks, Conor ; Mariotti, Davide ; La Porta, Andrea ; Altantzis, Thomas ; Barreca, Davide. / Surface Functionalization of Grown-on-Tip ZnO Nanopyramids: From Fabrication to Light-Triggered Applications. In: ACS Applied Materials & Interfaces. 2019 ; Vol. 11, No. 17. pp. 15881-15890.
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Gasparotto, A, Maccato, C, Carraro, G, Sada, C, Lavrencic Stangar, U, Alessi, B, Rocks, C, Mariotti, D, La Porta, A, Altantzis, T & Barreca, D 2019, 'Surface Functionalization of Grown-on-Tip ZnO Nanopyramids: From Fabrication to Light-Triggered Applications', ACS Applied Materials & Interfaces, vol. 11, no. 17, pp. 15881-15890. https://doi.org/10.1021/acsami.8b22744

Surface Functionalization of Grown-on-Tip ZnO Nanopyramids: From Fabrication to Light-Triggered Applications. / Gasparotto, Alberto; Maccato, Chiara; Carraro, Giorgio; Sada, Cinzia; Lavrencic Stangar, Urska; Alessi, Bruno; Rocks, Conor; Mariotti, Davide; La Porta, Andrea; Altantzis, Thomas; Barreca, Davide.

In: ACS Applied Materials & Interfaces, Vol. 11, No. 17, 01.05.2019, p. 15881-15890.

Research output: Contribution to journalArticle

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T1 - Surface Functionalization of Grown-on-Tip ZnO Nanopyramids: From Fabrication to Light-Triggered Applications

AU - Gasparotto, Alberto

AU - Maccato, Chiara

AU - Carraro, Giorgio

AU - Sada, Cinzia

AU - Lavrencic Stangar, Urska

AU - Alessi, Bruno

AU - Rocks, Conor

AU - Mariotti, Davide

AU - La Porta, Andrea

AU - Altantzis, Thomas

AU - Barreca, Davide

PY - 2019/5/1

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N2 - We report on a combined chemical vapor deposition (CVD)/radio frequency (RF) sputtering synthetic strategy for the controlled surface modification of ZnO nanostructures by Ti-containing species. Specifically, the proposed approach consists in the CVD of grown-on-tip ZnO nanopyramids, followed by titanium RF sputtering under mild conditions. The results obtained by a thorough characterization demonstrate the successful ZnO surface functionalization with dispersed Ti-containing species in low amounts. This phenomenon, in turn, yields a remarkable enhancement of photoactivated superhydrophilic behavior, self-cleaning ability, and photocatalytic performances in comparison to bare ZnO. The reasons accounting for such an improvement are unravelled by a multitechnique analysis, elucidating the interplay between material chemico-physical properties and the corresponding functional behavior. Overall, the proposed strategy stands as an amenable tool for the mastering of semiconductor-based functional nanoarchitectures through ad hoc engineering of the system surface.

AB - We report on a combined chemical vapor deposition (CVD)/radio frequency (RF) sputtering synthetic strategy for the controlled surface modification of ZnO nanostructures by Ti-containing species. Specifically, the proposed approach consists in the CVD of grown-on-tip ZnO nanopyramids, followed by titanium RF sputtering under mild conditions. The results obtained by a thorough characterization demonstrate the successful ZnO surface functionalization with dispersed Ti-containing species in low amounts. This phenomenon, in turn, yields a remarkable enhancement of photoactivated superhydrophilic behavior, self-cleaning ability, and photocatalytic performances in comparison to bare ZnO. The reasons accounting for such an improvement are unravelled by a multitechnique analysis, elucidating the interplay between material chemico-physical properties and the corresponding functional behavior. Overall, the proposed strategy stands as an amenable tool for the mastering of semiconductor-based functional nanoarchitectures through ad hoc engineering of the system surface.

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