Magnetic Graphene-Based Sheets for Bacteria Capture and Destruction Using a High-Frequency Magnetic Field
Andri Hardiansyah,
Ming-Chien Yang,
Hung-Liang Liao,
Yu-Wei Cheng,
Fredina Destyorini,
Yuyun Irmawati,
Chi-Ming Liu,
Ming-Chi Yung,
Chuan-Chih Hsu,
Ting-Yu Liu
Affiliations
Andri Hardiansyah
Research Center for Physics, Indonesian Institute of Sciences, Tangerang Selatan 15314, Indonesia
Ming-Chien Yang
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
Hung-Liang Liao
Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
Yu-Wei Cheng
Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
Fredina Destyorini
Research Center for Physics, Indonesian Institute of Sciences, Tangerang Selatan 15314, Indonesia
Yuyun Irmawati
Research Center for Physics, Indonesian Institute of Sciences, Tangerang Selatan 15314, Indonesia
Chi-Ming Liu
Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
Ming-Chi Yung
Department of Cardiovascular Surgery, Taiwan Adventist Hospital, and School of Medicine, National Yang Ming University, Taipei 105, Taiwan
Chuan-Chih Hsu
Division of Cardiovascular Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei Heart Institute, Taipei Medical University, Taipei 11031, Taiwan
Ting-Yu Liu
Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 24301, Taiwan
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.
