Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA Nanochains
Due to the abuse of antibiotics, the sensitivity of patients to antibiotics is gradually reduced. This work develops a Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochain which shows an interesting magnetic-field-induced improvement of its photothermal an...
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MDPI AG
2022-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/387 |
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| author | Kezhu Xu Qunling Fang Jing Wang Ailing Hui Shouhu Xuan |
| author_facet | Kezhu Xu Qunling Fang Jing Wang Ailing Hui Shouhu Xuan |
| author_sort | Kezhu Xu |
| collection | DOAJ |
| description | Due to the abuse of antibiotics, the sensitivity of patients to antibiotics is gradually reduced. This work develops a Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochain which shows an interesting magnetic-field-induced improvement of its photothermal antibacterial property. First, SiO<sub>2</sub> was wrapped on Fe<sub>3</sub>O<sub>4</sub> nanospheres assembled in a chain to form a Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> nanocomposite with a chain-like nanostructure. Then, the magnetic Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochains were prepared using in situ redox-oxidization polymerization. Under the irradiation of an 808 nm NIR laser, the temperature rise of the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochain dispersion was obvious, indicating that they possessed a good photothermal effect. Originating from the Fe<sub>3</sub>O<sub>4</sub>, the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochain showed a typical soft magnetic behavior. Both the NIR and magnetic field affected the antimicrobial performance of the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochains. <i>Escherichia coli</i> and <i>Staphylococcus aureus</i> were used as models to verify the antibacterial properties. The experimental results showed that the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochains exhibited good antibacterial properties under photothermal conditions. After applying a magnetic field, the bactericidal effect was further significantly enhanced. The above results show that the material has a broad application prospect in inhibiting the growth of bacteria. |
| first_indexed | 2024-03-11T09:54:44Z |
| format | Article |
| id | doaj.art-2a591751b1ad4b2f85212a5c904a5f9a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:54:44Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-2a591751b1ad4b2f85212a5c904a5f9a2023-11-16T15:51:00ZengMDPI AGMaterials1996-19442022-12-0116138710.3390/ma16010387Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA NanochainsKezhu Xu0Qunling Fang1Jing Wang2Ailing Hui3Shouhu Xuan4School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, ChinaSchool of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, ChinaCAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science and Technology of China, Hefei 230027, ChinaDue to the abuse of antibiotics, the sensitivity of patients to antibiotics is gradually reduced. This work develops a Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochain which shows an interesting magnetic-field-induced improvement of its photothermal antibacterial property. First, SiO<sub>2</sub> was wrapped on Fe<sub>3</sub>O<sub>4</sub> nanospheres assembled in a chain to form a Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> nanocomposite with a chain-like nanostructure. Then, the magnetic Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochains were prepared using in situ redox-oxidization polymerization. Under the irradiation of an 808 nm NIR laser, the temperature rise of the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochain dispersion was obvious, indicating that they possessed a good photothermal effect. Originating from the Fe<sub>3</sub>O<sub>4</sub>, the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochain showed a typical soft magnetic behavior. Both the NIR and magnetic field affected the antimicrobial performance of the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochains. <i>Escherichia coli</i> and <i>Staphylococcus aureus</i> were used as models to verify the antibacterial properties. The experimental results showed that the Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA nanochains exhibited good antibacterial properties under photothermal conditions. After applying a magnetic field, the bactericidal effect was further significantly enhanced. The above results show that the material has a broad application prospect in inhibiting the growth of bacteria.https://www.mdpi.com/1996-1944/16/1/387antibacterialphotothermal effectmagneticnanochainsterilization |
| spellingShingle | Kezhu Xu Qunling Fang Jing Wang Ailing Hui Shouhu Xuan Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA Nanochains Materials antibacterial photothermal effect magnetic nanochain sterilization |
| title | Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA Nanochains |
| title_full | Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA Nanochains |
| title_fullStr | Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA Nanochains |
| title_full_unstemmed | Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA Nanochains |
| title_short | Magnetic-Field-Induced Improvement of Photothermal Sterilization Performance by Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub>@Au/PDA Nanochains |
| title_sort | magnetic field induced improvement of photothermal sterilization performance by fe sub 3 sub o sub 4 sub sio sub 2 sub au pda nanochains |
| topic | antibacterial photothermal effect magnetic nanochain sterilization |
| url | https://www.mdpi.com/1996-1944/16/1/387 |
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