Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2)

[Image: see text] Visually black, electrically leaky, amorphous titania (am-TiO(2)) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti(3+) in the film. Oxidat...

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Autores principales: Ali-Löytty, Harri, Hannula, Markku, Saari, Jesse, Palmolahti, Lauri, Bhuskute, Bela D., Ulkuniemi, Riina, Nyyssönen, Tuomo, Lahtonen, Kimmo, Valden, Mika
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6727370/
https://www.ncbi.nlm.nih.gov/pubmed/30608653
http://dx.doi.org/10.1021/acsami.8b20608
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author Ali-Löytty, Harri
Hannula, Markku
Saari, Jesse
Palmolahti, Lauri
Bhuskute, Bela D.
Ulkuniemi, Riina
Nyyssönen, Tuomo
Lahtonen, Kimmo
Valden, Mika
author_facet Ali-Löytty, Harri
Hannula, Markku
Saari, Jesse
Palmolahti, Lauri
Bhuskute, Bela D.
Ulkuniemi, Riina
Nyyssönen, Tuomo
Lahtonen, Kimmo
Valden, Mika
author_sort Ali-Löytty, Harri
collection PubMed
description [Image: see text] Visually black, electrically leaky, amorphous titania (am-TiO(2)) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti(3+) in the film. Oxidation of Ti(3+) upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO(2). ALD-grown black TiO(2), without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO(2).
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spelling pubmed-67273702019-09-06 Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2) Ali-Löytty, Harri Hannula, Markku Saari, Jesse Palmolahti, Lauri Bhuskute, Bela D. Ulkuniemi, Riina Nyyssönen, Tuomo Lahtonen, Kimmo Valden, Mika ACS Appl Mater Interfaces [Image: see text] Visually black, electrically leaky, amorphous titania (am-TiO(2)) thin films were grown by atomic layer deposition (ALD) for photocatalytic applications. Broad spectral absorbance in the visible range and exceptional conductivity are attributed to trapped Ti(3+) in the film. Oxidation of Ti(3+) upon heat treatment leads to a drop in conductivity, a color change from black to white, and crystallization of am-TiO(2). ALD-grown black TiO(2), without any heat treatment, is subject to dissolution in alkaline photoelectrochemical conditions. The best photocatalytic activity for solar water splitting is obtained for completely crystalline white TiO(2). American Chemical Society 2019-01-04 2019-01-23 /pmc/articles/PMC6727370/ /pubmed/30608653 http://dx.doi.org/10.1021/acsami.8b20608 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
spellingShingle Ali-Löytty, Harri
Hannula, Markku
Saari, Jesse
Palmolahti, Lauri
Bhuskute, Bela D.
Ulkuniemi, Riina
Nyyssönen, Tuomo
Lahtonen, Kimmo
Valden, Mika
Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2)
title Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2)
title_full Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2)
title_fullStr Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2)
title_full_unstemmed Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2)
title_short Diversity of TiO(2): Controlling the Molecular and Electronic Structure of Atomic-Layer-Deposited Black TiO(2)
title_sort diversity of tio(2): controlling the molecular and electronic structure of atomic-layer-deposited black tio(2)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6727370/
https://www.ncbi.nlm.nih.gov/pubmed/30608653
http://dx.doi.org/10.1021/acsami.8b20608
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