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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 362 - 369 (8page)
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초록· 키워드
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Although silver (Ag)-based nanoparticles (NPs) are frequently used for bactericidal purposes, they have critical issues including excessive release of Ag+, severe oxidation, and cytotoxicity. In this study, we designed a multifunctional, on-demand antibacterial agent by successively encapsulating bimetallic gold/silver nanorods (Ag/AgNRs) with mesoporous silica (mSiO2) shells. Au/AuNRs were synthesized by coating Ag on AuNRs in a controlled manner, so that they exhibited a localized surface plasmon resonance peak in the near-infrared (NIR) region. When Au/AgNR@mSiO2 NPs were irradiated with an NIR laser under optimal conditions (0.4 W/cm2), they generated a small amount of heat (40–45 oC), which successively triggered the release of Ag+ and induced bacterial cell death. Here, mSiO2 shells play critical roles because they not only protect Ag from oxidation but also prevent the burst release of Ag+ and improve biocompatibility of the antibacterial agent against normal cells. We found that this multifunctional bacterial agent effectively kills gram-negative Escherichia coli and gram-positive Staphylococcus aureus without significantly increasing the temperature of the medium. Au/AgNR@mSiO2 NPs were also biologically benign with high biocompatibility against mammalian cells.
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참고문헌 (30)
참고문헌 신청
Unser, S. / 2015 / Localized Surface Plasmon Resonance Biosensing: Current Challenges and Approaches / Sensors 15:15684~15716
Ayala-orozco, C. / 2014 / Au Nanomatryoshkas as Efficient Near-infrared Photothermal Transducers for Cancer Treatment :Benchmarking against Nanoshells / ACS Nano 6:6372~6381
Lin, L. S. / 2017 / Yolk – Shell Nanostructure : An Ideal Architecture to Achieve Harmonious Integration of Magnetic – Plasmonic Hybrid Theranostic Platform / Adv. Mater 29:1606681
Javid, A. / 2017 / Size-Controlled Growth and Antibacterial Mechanism for Cu:C Nanocomposite Thin Films / Phys. Chem. Chem. Phys 19:237~244
Tan, L. H. / 2013 / Facile and Efficient Preparation of Anisotropic DNA-Functionalized Gold Nanoparticles and Their Regioselective Assembly / J. Am. Chem. Soc 135:17675~17678
Ayala-orozco, C. / 2014 / Au Nanomatryoshkas as Efficient Near-infrared Photothermal Transducers for Cancer Treatment :Benchmarking against Nanoshells / ACS Nano 6:6372~6381
Lin, L. S. / 2017 / Yolk – Shell Nanostructure : An Ideal Architecture to Achieve Harmonious Integration of Magnetic – Plasmonic Hybrid Theranostic Platform / Adv. Mater 29:1606681
Javid, A. / 2017 / Size-Controlled Growth and Antibacterial Mechanism for Cu:C Nanocomposite Thin Films / Phys. Chem. Chem. Phys 19:237~244
Tan, L. H. / 2013 / Facile and Efficient Preparation of Anisotropic DNA-Functionalized Gold Nanoparticles and Their Regioselective Assembly / J. Am. Chem. Soc 135:17675~17678
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