2020年12月
Polycarbonate/Titania Hybrid Films with Localized Photo-Induced Magnetic-Phase Transition
Nanomaterials
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- 巻
- 11
- 号
- 1
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.3390/nano11010005
- 出版者・発行元
- MDPI
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 (Ti3+) 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 Ti3+ under a UV irradiation of 250 W for 2 h, and the difference in oxygen permeability significantly affected the lifetime of the Ti3+ 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 Ti3+ 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.
- リンク情報
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- DOI
- https://doi.org/10.3390/nano11010005
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/33375188
- PubMed Central
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7822203
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000610644900001&DestApp=WOS_CPL
- URL
- https://www.mdpi.com/2079-4991/11/1/5
- ID情報
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- DOI : 10.3390/nano11010005
- eISSN : 2079-4991
- ORCIDのPut Code : 85846267
- PubMed ID : 33375188
- PubMed Central 記事ID : PMC7822203
- Web of Science ID : WOS:000610644900001