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Maintenance of the activity of mono-dispersed Au and Ag nano-particles embedded in agar gel for ion-sensing and antimicrobial applications

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Abstract

Composite materials were synthesized by encapsulating Au and Ag nanoparticles in an agar gel matrix. These metallic nano-particles were found to be separately stored, so their optical, catalytic, and antibacterial properties were retained both in the composite gel and a composite membrane. The composite gels were stable under hard external conditions. Based on this, a sensor for the detection of Hg2+ was developed using the Au nanoparticle/agar composite gel. Antibacterial materials were achieved using the Ag nanoparticle/agar composite gel and composite membrane. These two Ag nanoparticle-based materials showed good antibacterial activity against Gram-negative Escherichia coli and Gram-positive Staphylococcus aureus.

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Authors and Affiliations

  1. Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education; College of Chemistry and Chemical Engineering, Southwest University, Chongqing, 400715, China

    Yijuan Long, Yi Wang, Yue Liu & Yuanfang Li

  2. College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, China

    Qiaoling Zeng

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  1. Yijuan Long
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  2. Yi Wang
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  3. Yue Liu
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  4. Qiaoling Zeng
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  5. Yuanfang Li
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Correspondence to Yuanfang Li.

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Long, Y., Wang, Y., Liu, Y. et al. Maintenance of the activity of mono-dispersed Au and Ag nano-particles embedded in agar gel for ion-sensing and antimicrobial applications. Sci. China Chem. 58, 666–672 (2015). https://doi.org/10.1007/s11426-014-5292-7

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  • DOI: https://doi.org/10.1007/s11426-014-5292-7

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