Cargando…
Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition
Materials that exhibit the photo-induced magnetic-phase transition of titania are receiving significant attention because they can be easily switched between diamagnetism and paramagnetism by UV irradiation. However, it is difficult to store photo-induced titanium (Ti(3+)) in air because of its easy...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7822203/ https://www.ncbi.nlm.nih.gov/pubmed/33375188 http://dx.doi.org/10.3390/nano11010005 |
_version_ | 1783639579311472640 |
---|---|
author | Hara, Shuta Kurebayashi, Sei Sanae, Genza Watanabe, Shota Kaneko, Takehiro Toyama, Takeshi Shimizu, Shigeru Ikake, Hiroki |
author_facet | Hara, Shuta Kurebayashi, Sei Sanae, Genza Watanabe, Shota Kaneko, Takehiro Toyama, Takeshi Shimizu, Shigeru Ikake, Hiroki |
author_sort | Hara, Shuta |
collection | PubMed |
description | Materials that exhibit the photo-induced magnetic-phase transition of titania are receiving significant attention because they can be easily switched between diamagnetism and paramagnetism by UV irradiation. However, it is difficult to store photo-induced titanium (Ti(3+)) in air because of its easy oxidation upon oxygen exposure. In this study, titania/polycarbonate hybrid films were prepared using linear 1,6-hexanediol (PHMCD), cyclic 1,4-cyclohexanedimethanol (PCHCD), or their copolymerized carbonate oligomers using the sol–gel method. The oxygen permeability of the hybrid film decreased as the ratio of the ring structure increased by a factor of approximately 32 from PHMCD with only the chain structure to PCHCD with only the ring structure. These hybrid films can generate Ti(3+) under a UV irradiation of 250 W for 2 h, and the difference in oxygen permeability significantly affected the lifetime of the Ti(3+) by a factor of up to 120. In addition, the tensile tests and IR measurements demonstrated that UV irradiation had little effect on the mechanical intensity and matrix chemical structure. Moreover, the magnetic susceptibility of Ti(3+) present in PCHCD was confirmed to be 6.2 (10(−3) emu/g(titania)) under an external magnetic field of 5 T induced using a superconducting quantum interference device. |
format | Online Article Text |
id | pubmed-7822203 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-78222032021-01-23 Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition Hara, Shuta Kurebayashi, Sei Sanae, Genza Watanabe, Shota Kaneko, Takehiro Toyama, Takeshi Shimizu, Shigeru Ikake, Hiroki Nanomaterials (Basel) Article Materials that exhibit the photo-induced magnetic-phase transition of titania are receiving significant attention because they can be easily switched between diamagnetism and paramagnetism by UV irradiation. However, it is difficult to store photo-induced titanium (Ti(3+)) in air because of its easy oxidation upon oxygen exposure. In this study, titania/polycarbonate hybrid films were prepared using linear 1,6-hexanediol (PHMCD), cyclic 1,4-cyclohexanedimethanol (PCHCD), or their copolymerized carbonate oligomers using the sol–gel method. The oxygen permeability of the hybrid film decreased as the ratio of the ring structure increased by a factor of approximately 32 from PHMCD with only the chain structure to PCHCD with only the ring structure. These hybrid films can generate Ti(3+) under a UV irradiation of 250 W for 2 h, and the difference in oxygen permeability significantly affected the lifetime of the Ti(3+) by a factor of up to 120. In addition, the tensile tests and IR measurements demonstrated that UV irradiation had little effect on the mechanical intensity and matrix chemical structure. Moreover, the magnetic susceptibility of Ti(3+) present in PCHCD was confirmed to be 6.2 (10(−3) emu/g(titania)) under an external magnetic field of 5 T induced using a superconducting quantum interference device. MDPI 2020-12-22 /pmc/articles/PMC7822203/ /pubmed/33375188 http://dx.doi.org/10.3390/nano11010005 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Hara, Shuta Kurebayashi, Sei Sanae, Genza Watanabe, Shota Kaneko, Takehiro Toyama, Takeshi Shimizu, Shigeru Ikake, Hiroki Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
title | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
title_full | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
title_fullStr | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
title_full_unstemmed | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
title_short | Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition |
title_sort | polycarbonate/titania hybrid films with localized photo-induced magnetic-phase transition |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7822203/ https://www.ncbi.nlm.nih.gov/pubmed/33375188 http://dx.doi.org/10.3390/nano11010005 |
work_keys_str_mv | AT harashuta polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition AT kurebayashisei polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition AT sanaegenza polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition AT watanabeshota polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition AT kanekotakehiro polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition AT toyamatakeshi polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition AT shimizushigeru polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition AT ikakehiroki polycarbonatetitaniahybridfilmswithlocalizedphotoinducedmagneticphasetransition |