期刊
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
卷 33, 期 7, 页码 3786-3794出版社
ELSEVIER
DOI: 10.1016/j.msec.2013.05.009
关键词
Recyclable; Antimicrobial; Catechol; Iron oxide; Silver nanoparticles
资金
- industrial infrastructure program for fundamental technologies [R 0001435, N00140008]
- Ministry of Knowledge Economy (MKE), Republic of Korea
- National Research Council of Science & Technology (NST), Republic of Korea [EO130003] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This paper introduces a facile method to make highly stable and recyclable antimicrobial magnetic nanoparticles (NPs). Initially, magnetic iron oxide nanoparticles (IONPs) were coated with poly (vinyl pyrrolidone) conjugated catechol (PVP-CCDP). Afterward, silver nanoparticles (Ag-0) were deposited onto PVP-CCDP coated IONPs using remain catechol. The prepared nanoparticles showed long term (similar to 4 weeks) colloidal stability and redispersibility, respectively, against external magnetic field and over a broad range of pH (4-12). The NPs were characterized by UV-vis, SEM, XPS, and XRD measurements. TEM and DLS analyses showed that the mean particle size of PVP-CCDP coated IONPs/Ag-0 were about 72 nm. The recyclable magnetic NPs possessed a high antibacterial effect against the model microbes Staphylococcus aureus and Escherichia coli and could be separated easily using magnet following antibacterial test for repeated uses and maintained 100% antibacterial efficiency during three cycles. In MTT assay, the magnetic nanoparticles possessed no measureable cytotoxicity to live cells. (C) 2013 Elsevier B.V. All rights reserved.
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