Polyhydroxy Fullerenes Enhance Antibacterial and Electrocatalytic Activity of Silver Nanoparticles

被引:2
作者
Palomino, Luis [1 ,2 ]
Chipoco Haro, Danae A. [1 ]
Gakiya-Teruya, Miguel [1 ]
Zhou, Feng [3 ]
La Rosa-Toro, Adolfo [4 ]
Krishna, Vijay [3 ]
Rodriguez-Reyes, Juan Carlos F. [1 ,2 ,5 ]
机构
[1] Univ Ingn & Tecnol UTEC, Lab Nanosci & Applicat NASCA, 165 Medrano Silva, Lima 15063, Peru
[2] Univ Ingn & Tecnol UTEC, Ctr Invest Bioingn BIO, 165 Medrano Silva, Lima 15063, Peru
[3] Cleveland Clin, Lerner Res Inst, Dept Biomed Engn, Cleveland, OH 44106 USA
[4] Univ Nacl Ingn, Fac Ciencias, Lab Invest Electroquim Aplicada, Av Tupac Amaru 210, Lima 15333, Peru
[5] Univ Ingn & Tecnol UTEC, Dept Chem Engn, 165 Medrano Silva, Lima 15063, Peru
关键词
silver nanoparticles; polyhydroxy fullerene; antibacterial activity; oxygen reduction reaction; oxygen evolution reaction; one-pot synthesis; ELECTRON-TRANSFER; PHOTOCATALYSIS; EVOLUTION; SIZE;
D O I
10.3390/nano12193321
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Silver nanoparticles (AgNPs) are known and widely used for their antibacterial properties. However, the ever-increasing resistance of microorganisms compels the design of novel nanomaterials which are able to surpass their capabilities. Herein, we synthesized silver nanoparticles using, for the first time, polyhydroxy fullerene (PHF) as a reducing and capping agent, through a one-pot synthesis method. The resulting nanoparticles (PHF-AgNPs) were compared to AgNPs that were synthesized using sodium citrate (citrate-AgNPs). They were characterized using high-resolution transmission electron microscopy (HR-TEM), dynamic light scattering, and UV-visible spectroscopy. Our results showed that PHF-AgNPs have a smaller size and a narrower size distribution than citrate-AgNPs, which suggests that PHF may be a better capping agent than citrate. Antibacterial assays using E. coli showed enhanced antimicrobial activity for PHF-AgNPs compared to citrate-AgNPs. The electrocatalytic activity of nanoparticles towards oxygen evolution and reduction reaction (OER and ORR, respectively) was tested through cyclic voltammetry. Both nanoparticles are found to promote OER and ORR, but PHF-AgNPs showed a significant increase in activity with respect to citrate-AgNPs. Thus, our results demonstrate that the properties of forming nanoparticles can be tuned by choosing the appropriate reducing/capping agent. Specifically, this suggests that PHF-AgNPs can find potential applications for both catalytic and biomedical applications.
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页数:9
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