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Enhanced photothermal bactericidal activity of chemically reduced graphene oxide stabilized by tripodal amphiphile

机译：三脚架两亲物稳定的化学还原氧化石墨烯的增强的光热杀菌活性

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摘要

Highly water-dispersible and strongly near IR absorbing chemically reduced graphene oxide (rGO)/CP750 assembly was firstly prepared through noncovalent approach from graphene oxide (GO) and CP750, a cyclotriphosphazene ring-based tripodal amphiphile. Through the stable noncovalent interaction by tripodal CP750 amphiphiles, rGO/CP750 assembly presented both high absorption coefficient of 2260 L g(-1) m(-1) and high near infrared (NIR) absorbance (1.07 at rGO concentration of 0.05 wt.%) in aqueous media without forming precipitates for a long term storage. Upon NIR laser (808 nm) irradiation, rGO/CP750 presented high photothermal heat generating ranging from + 34.1 to + 78.0 degrees C depending on the assembly concentration. Finally, excellent photothermal bactericidal performance of nearly 100% was accomplished toward both E. coli and S. aureus even at a low concentration of assembly (0.1 mg/mL) within 10 min of NIR irradiation. In overall, our study shows that high photothermal bactericidal performance that has been mainly claimed by other strongly NIR absorbing nanomaterials such as gold nanorods and semiconducting polymers can be easily accomplished from rGO-based nanomaterials with the proper utilization of tripodal amphiphiles. (C) 2018 Published by Elsevier B.V.
机译：首先通过非共价方法由氧化石墨烯（GO）和基于环三磷腈环的三脚架两亲物CP750通过非共价方法制备了高度水分散性和强烈吸收IR的化学还原氧化石墨烯（rGO）/ CP750组件。通过三脚架CP750两亲物的稳定的非共价相互作用，rGO / CP750组件既具有2260 L g（-1）m（-1）的高吸收系数，又具有高近红外（NIR）吸收率（rGO浓度为0.05 wt。％时为1.07） ）在水性介质中，不会形成沉淀，可以长期保存。在NIR激光（808 nm）照射下，rGO / CP750产生的高光热生热范围为+ 34.1到+ 78.0摄氏度，具体取决于组装浓度。最后，即使在NIR照射的10分钟之内以低浓度的装配体（0.1 mg / mL），对大肠杆菌和金黄色葡萄球菌均具有近100％的优异光热杀菌性能。总体而言，我们的研究表明，通过适当利用三脚架两亲物，基于rGO的纳米材料可以轻松实现高光热杀菌性能，而其他高NIR吸收纳米材料（如金纳米棒和半导体聚合物）主要要求这种高光热杀菌性能。 （C）2018由Elsevier B.V.发布

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  • 来源
    《Applied Surface Science》 |2019年第30期|111-117|共7页
  • 作者

    Chae Ari; Jo Seongho; Choi Yujin; Ryu Bowon; Choi Cheong A.; Park Sung Young; In Insik;

  • 作者单位

    Korea Natl Univ Transportat, Dept IT Convergence Brian Korea PLUS 21, 50 Daehak Ro, Chungju 380702, South Korea;

    Korea Natl Univ Transportat, Dept IT Convergence Brian Korea PLUS 21, 50 Daehak Ro, Chungju 380702, South Korea;

    Korea Natl Univ Transportat, Dept IT Convergence Brian Korea PLUS 21, 50 Daehak Ro, Chungju 380702, South Korea;

    Korea Univ Sci & Technol, KIST Sch, Div Nano & Informat Technol, Seoul 02792, South Korea;

    Korea Natl Univ Transportat, Dept Chem & Biol Engn, Chungju Si 380702, South Korea;

    Korea Natl Univ Transportat, Dept IT Convergence Brian Korea PLUS 21, 50 Daehak Ro, Chungju 380702, South Korea|Korea Natl Univ Transportat, Dept Chem & Biol Engn, Chungju Si 380702, South Korea;

    Korea Natl Univ Transportat, Dept IT Convergence Brian Korea PLUS 21, 50 Daehak Ro, Chungju 380702, South Korea|Korea Natl Univ Transportat, Dept Polymer Sci & Engn, Chungju Si 380702, South Korea;

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  • 正文语种 eng
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  • 关键词

    Chemically reduced graphene oxide; Noncovalent interaction; Tripodal amphiphiles; Near infra-red absorbing; Photothermal; Bactericidal;

    机译：化学还原氧化石墨烯;非共价相互作用;三足类两亲物;近红外吸收;光热;杀菌;

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