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Open AccessArticle

Magnetic Graphene-Based Sheets for Bacteria Capture and Destruction Using a High-Frequency Magnetic Field

1
Research Center for Physics, Indonesian Institute of Sciences, Tangerang Selatan 15314, Indonesia
2
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
3
Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
4
Department of Cardiovascular Surgery, Taiwan Adventist Hospital, and School of Medicine, National Yang Ming University, Taipei 105, Taiwan
5
Division of Cardiovascular Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this paper.
Nanomaterials 2020, 10(4), 674; https://doi.org/10.3390/nano10040674
Received: 15 March 2020 / Revised: 23 March 2020 / Accepted: 29 March 2020 / Published: 3 April 2020
(This article belongs to the Special Issue Magnetic Nanoparticle-Based Hyperthermia and Theranostics)
Magnetic reduced graphene oxide (MRGO) sheets were prepared by embedding Fe3O4 nanoparticles on polyvinylpyrrolidone (PVP) and poly(diallyldimethylammonium chloride) (PDDA)-modified graphene oxide (GO) sheets for bacteria capture and destruction under a high-frequency magnetic field (HFMF). The characteristics of MRGO sheets were evaluated systematically by transmission electron microscopy (TEM), scanning electron microscopy (SEM), zeta potential measurement, X-ray diffraction (XRD), vibrating sample magnetometry (VSM), and X-ray photoelectron spectroscopy (XPS). TEM observation revealed that magnetic nanoparticles (8–10 nm) were dispersed on MRGO sheets. VSM measurements confirmed the superparamagnetic characteristics of the MRGO sheets. Under HFMF exposure, the temperature of MRGO sheets increased from 25 to 42 °C. Furthermore, we investigated the capability of MRGO sheets to capture and destroy bacteria (Staphylococcus aureus). The results show that MRGO sheets could capture bacteria and kill them through an HFMF, showing a great potential in magnetic separation and antibacterial application. View Full-Text
Keywords: magnetic nanoparticles; reduced graphene oxide sheets; high-frequency magnetic field; bacteria capturing magnetic nanoparticles; reduced graphene oxide sheets; high-frequency magnetic field; bacteria capturing
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MDPI and ACS Style

Hardiansyah, A.; Yang, M.-C.; Liao, H.-L.; Cheng, Y.-W.; Destyorini, F.; Irmawati, Y.; Liu, C.-M.; Yung, M.-C.; Hsu, C.-C.; Liu, T.-Y. Magnetic Graphene-Based Sheets for Bacteria Capture and Destruction Using a High-Frequency Magnetic Field. Nanomaterials 2020, 10, 674.

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