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

Alberto Gasparotto | Zendy; Chiara Maccato | Zendy; Giorgio Carraro | Zendy; C. Sada | Zendy; Urška Lavrenčić Štangar | Zendy; Bruno Alessi | Zendy; Conor Rocks | Zendy; Davide Mariotti | Zendy; Andrea La Porta | Zendy; Thomas Altantzis | Zendy; Davide Barreca | Zendy

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

Author(s) -

Alberto Gasparotto,

Chiara Maccato,

Giorgio Carraro,

C. Sada,

Urška Lavrenčić Štangar,

Bruno Alessi,

Conor Rocks,

Davide Mariotti,

Andrea La Porta,

Thomas Altantzis,

Davide Barreca

Publication year - 2019

Publication title -

acs applied materials and interfaces

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.8b22744

Subject(s) - materials science , surface modification , superhydrophilicity , sputtering , nanotechnology , fabrication , nanostructure , photocatalysis , semiconductor , chemical vapor deposition , nanomaterials , characterization (materials science) , titanium , deposition (geology) , chemical engineering , thin film , optoelectronics , catalysis , contact angle , composite material , metallurgy , organic chemistry , medicine , paleontology , chemistry , alternative medicine , pathology , sediment , engineering , biology

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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