SilverBacteriV1, Main, Corpus, bibRecord, 000772

Magnetic nanohybrids loaded with bimetal core-shell-shell nanorods for bacteria capture, separation, and near-infrared photothermal treatment.

Identifieur interne : 000772 ( Main/Corpus ); précédent : 000771; suivant : 000773

Magnetic nanohybrids loaded with bimetal core-shell-shell nanorods for bacteria capture, separation, and near-infrared photothermal treatment.

Auteurs : Bo Hu ; Ning Wang ; Lu Han ; Ming-Li Chen ; Jian-Hua Wang

Source :

Chemistry (Weinheim an der Bergstrasse, Germany) [ 1521-3765 ] ; 2015.

RBID : pubmed:25754902

English descriptors

KwdEn :
- Escherichia coli (radiation effects), Gold (chemistry), Graphite (chemistry), Magnetics (MeSH), Nanotubes (MeSH), Silver (chemistry), Spectroscopy, Near-Infrared (methods).
MESH :
- chemical , chemistry : Gold, Graphite, Silver.
- methods : Spectroscopy, Near-Infrared.
- radiation effects : Escherichia coli.
- Magnetics, Nanotubes.

Abstract

A novel antimicrobial nanohybrid based on near-infrared (NIR) photothermal conversion is designed for bacteria capture, separation, and sterilization (killing). Positively charged magnetic reduced graphene oxide with modification by polyethylenimine (rGO-Fe3 O4 -PEI) is prepared and then loaded with core-shell-shell Au-Ag-Au nanorods to construct the nanohybrid rGO-Fe3 O4 -Au-Ag-Au. NIR laser irradiation melts the outer Au shell and exposes the inner Ag shell, which facilitates controlled release of the silver shell. The nanohybrids combine physical photothermal sterilization as a result of the outer Au shell with the antibacterial effect of the inner Ag shell. In addition, the nanohybrid exhibits high heat conductivity because of the rGO and rapid magnetic-separation capability that is attributable to Fe3 O4 . The nanohybrid provides a significant improvement of bactericidal efficiency with respect to bare Au-Ag-Au nanorods and facilitates the isolation of bacteria from sample matrixes. A concentration of 25 μg mL(-1) of nanohybrid causes 100 % capture and separation of Escherichia coli O157:H7 (1×10(8) cfu mL(-1) ) from an aqueous medium in 10 min. In addition, it causes a 22 °C temperature rise for the surrounding solution under NIR irradiation (785 nm, 50 mW cm(-2) ) for 10 min. With magnetic separation, 30 μg mL(-1) of nanohybrid results in a 100 % killing rate for E. coli O157:H7 cells. The facile bacteria separation and photothermal sterilization is potentially feasible for environmental and/or clinical treatment.

DOI: 10.1002/chem.201405960
PubMed: 25754902

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pubmed:25754902

Le document en format XML

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<author><name sortKey="Hu, Bo" sort="Hu, Bo" uniqKey="Hu B" first="Bo" last="Hu">Bo Hu</name>
<affiliation><nlm:affiliation>Research Center for Analytical Sciences, College of Sciences, Box 332, Northeastern University, Shenyang 110819 (P.R. China); Department of Biochemistry and Molecular Biology, China Medical University, Shenyang 110122 (P.R. China).</nlm:affiliation>
</affiliation>
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<author><name sortKey="Wang, Ning" sort="Wang, Ning" uniqKey="Wang N" first="Ning" last="Wang">Ning Wang</name>
</author>
<author><name sortKey="Han, Lu" sort="Han, Lu" uniqKey="Han L" first="Lu" last="Han">Lu Han</name>
</author>
<author><name sortKey="Chen, Ming Li" sort="Chen, Ming Li" uniqKey="Chen M" first="Ming-Li" last="Chen">Ming-Li Chen</name>
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<author><name sortKey="Wang, Jian Hua" sort="Wang, Jian Hua" uniqKey="Wang J" first="Jian-Hua" last="Wang">Jian-Hua Wang</name>
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<author><name sortKey="Hu, Bo" sort="Hu, Bo" uniqKey="Hu B" first="Bo" last="Hu">Bo Hu</name>
<affiliation><nlm:affiliation>Research Center for Analytical Sciences, College of Sciences, Box 332, Northeastern University, Shenyang 110819 (P.R. China); Department of Biochemistry and Molecular Biology, China Medical University, Shenyang 110122 (P.R. China).</nlm:affiliation>
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<author><name sortKey="Wang, Ning" sort="Wang, Ning" uniqKey="Wang N" first="Ning" last="Wang">Ning Wang</name>
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<author><name sortKey="Han, Lu" sort="Han, Lu" uniqKey="Han L" first="Lu" last="Han">Lu Han</name>
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<author><name sortKey="Chen, Ming Li" sort="Chen, Ming Li" uniqKey="Chen M" first="Ming-Li" last="Chen">Ming-Li Chen</name>
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<author><name sortKey="Wang, Jian Hua" sort="Wang, Jian Hua" uniqKey="Wang J" first="Jian-Hua" last="Wang">Jian-Hua Wang</name>
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<term>Magnetics (MeSH)</term>
<term>Nanotubes (MeSH)</term>
<term>Silver (chemistry)</term>
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<front><div type="abstract" xml:lang="en">A novel antimicrobial nanohybrid based on near-infrared (NIR) photothermal conversion is designed for bacteria capture, separation, and sterilization (killing). Positively charged magnetic reduced graphene oxide with modification by polyethylenimine (rGO-Fe3 O4 -PEI) is prepared and then loaded with core-shell-shell Au-Ag-Au nanorods to construct the nanohybrid rGO-Fe3 O4 -Au-Ag-Au. NIR laser irradiation melts the outer Au shell and exposes the inner Ag shell, which facilitates controlled release of the silver shell. The nanohybrids combine physical photothermal sterilization as a result of the outer Au shell with the antibacterial effect of the inner Ag shell. In addition, the nanohybrid exhibits high heat conductivity because of the rGO and rapid magnetic-separation capability that is attributable to Fe3 O4 . The nanohybrid provides a significant improvement of bactericidal efficiency with respect to bare Au-Ag-Au nanorods and facilitates the isolation of bacteria from sample matrixes. A concentration of 25 μg mL(-1) of nanohybrid causes 100 % capture and separation of Escherichia coli O157:H7 (1×10(8) cfu mL(-1) ) from an aqueous medium in 10 min. In addition, it causes a 22 °C temperature rise for the surrounding solution under NIR irradiation (785 nm, 50 mW cm(-2) ) for 10 min. With magnetic separation, 30 μg mL(-1) of nanohybrid results in a 100 % killing rate for E. coli O157:H7 cells. The facile bacteria separation and photothermal sterilization is potentially feasible for environmental and/or clinical treatment.</div>
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<Abstract><AbstractText>A novel antimicrobial nanohybrid based on near-infrared (NIR) photothermal conversion is designed for bacteria capture, separation, and sterilization (killing). Positively charged magnetic reduced graphene oxide with modification by polyethylenimine (rGO-Fe3 O4 -PEI) is prepared and then loaded with core-shell-shell Au-Ag-Au nanorods to construct the nanohybrid rGO-Fe3 O4 -Au-Ag-Au. NIR laser irradiation melts the outer Au shell and exposes the inner Ag shell, which facilitates controlled release of the silver shell. The nanohybrids combine physical photothermal sterilization as a result of the outer Au shell with the antibacterial effect of the inner Ag shell. In addition, the nanohybrid exhibits high heat conductivity because of the rGO and rapid magnetic-separation capability that is attributable to Fe3 O4 . The nanohybrid provides a significant improvement of bactericidal efficiency with respect to bare Au-Ag-Au nanorods and facilitates the isolation of bacteria from sample matrixes. A concentration of 25 μg mL(-1) of nanohybrid causes 100 % capture and separation of Escherichia coli O157:H7 (1×10(8) cfu mL(-1) ) from an aqueous medium in 10 min. In addition, it causes a 22 °C temperature rise for the surrounding solution under NIR irradiation (785 nm, 50 mW cm(-2) ) for 10 min. With magnetic separation, 30 μg mL(-1) of nanohybrid results in a 100 % killing rate for E. coli O157:H7 cells. The facile bacteria separation and photothermal sterilization is potentially feasible for environmental and/or clinical treatment.</AbstractText>
<CopyrightInformation>© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.</CopyrightInformation>
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Magnetic nanohybrids loaded with bimetal core-shell-shell nanorods for bacteria capture, separation, and near-infrared photothermal treatment.

Magnetic nanohybrids loaded with bimetal core-shell-shell nanorods for bacteria capture, separation, and near-infrared photothermal treatment.

Source :

English descriptors

Abstract

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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