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

作　　者：Yijuan Long Yi Wang Yue Liu Qiaoling Zeng Yuanfang Li 

机构地区：[1]Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education [2]College of Chemistry and Chemical Engineering,Southwest University [3]College of Pharmaceutical Sciences, Southwest University

出　　处：《Science China Chemistry》2015年第4期666-672,共7页中国科学（化学英文版）

基　　金：financially supported by the National Natural Science Foundation of China(21035005);the Fundamental Research Funds for the Central Universities(XDJK2012C048);the Research Fund for the Doctoral Program of Southwest University(swu112071)

摘　　要：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.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.

关 键 词：nanoparticles composite materials optical sensors 

分 类 号：O648.17[理学—物理化学]