Facile fabrication of carbonaceous nanospheres loaded with silver nanoparticles as antibacterial materials

Abstract

Carbonaceous nanospheres with silver nanoparticles (CNs-Ag) composites were prepared by a facile and low cost method. Silver nanoparticles were successfully loaded onto the surface of carbonaceous nanospheres, which were examined by X-ray diffraction, UV-vis spectra, transmission electron microscopy, energy dispersive spectrometry and X-ray photoelectron spectroscopy. The antibacterial properties of the CNs-Ag composites were investigated by the kinetics of bacterial growth and a diskdiffusion test. The cytotoxicity of the CNs-Ag composites was determined by MTT assay. The results suggest that the obtained CNs-Ag composites exhibit enhanced antibacterial properties and lower cytotoxicity in comparison with silver nanoparticles. The composites may be alternative antibacterial materials with mild cytotoxicity in biomedical fields.

Efficient loading of silver nanoparticles on graphene oxide and its antibacterial properties

“…The rGO was oxidized and evaporated, while the AgNPs was reserved. The percentage of AgNPs in the AgNPs/rGO was about 67% as shown in table 1, which was much higher than that of AgNPs loading on the traditional carriers [4,10,11].…”

“…The traditional carriers of AgNPs are inorganic carriers and organic polymers. The inorganic materials include carbon materials [3,4], silicon oxide [5,6], and metallic oxides [7], etc, and AgNPs are attached to the carriers mainly through ion exchange or physical adsorption. The organic polymers are usually polyvinyl alcohol [8], chitosan [9] and cellulose [10,11], etc, and the interactions between the AgNPs and the carriers are usually charge transfer, electrostatic interaction and hydrogen bond.…”

“…The organic polymers are usually polyvinyl alcohol [8], chitosan [9] and cellulose [10,11], etc, and the interactions between the AgNPs and the carriers are usually charge transfer, electrostatic interaction and hydrogen bond. For conventional carriers, the mass percent of AgNPs loaded is usually between 1%∼20% [4,5,7,11,12], and the low AgNPs loading results in reduced antibacterial property. Further, the effusion of AgNPs in solutions augments when the load of AgNPs increases [3,[10][11][12], which decreases the durability, as well as increases the safety hazard when AgNPs composites are used as an antibacterial active component of food packaging, tableware and wound dressing etc.…”

Graphene based metal and metal oxide nanocomposites: synthesis, properties and their applications

“…high SERS activity of silver and large specific surface area of graphene. [558][559][560] Recently, Khan et al have described the synthesis of HRG/Ag nanocomposites using a Pulicaria glutinosa plant extract as reducing agent (cf. Fig.…”

Effect of DksA Protein on the Susceptibility of Escherichia coli Towards Novel Amine N-Halamine Polymeric Nanoparticles as Powerful Antibiotics

“…Escherichia coli as one of the typical human pathogen bacteria, is widely selected as model bacteria for evaluating the antibacterial activity of the biocides (Cui et al, 2012;Kong and Jang, 2008;Wang and Lim, 2013). Many proteins or factors are involved in all kinds of cell damage repair for adaptive survival responses.…”