Antibacterial Behavior of Laser-Ablated Copper Nanoparticles

doi:10.1007/s40195-016-0450-x

Abstract

Abstract:

Copper nanoparticles (Cu NPs) have been synthesized by using laser ablation method, using deionized water as main solvent. The formation of Cu NPs is confirmed by UV-visible spectrophotometer (UV-Vis), atomic force microscopy (AFM) and X-ray diffraction (XRD). Cu NPs fabricated by laser ablation have diameter in the range from 14 to 55 nm. Structural analysis revealed the face-centered cubic (fcc) crystal structure of Cu NPs. The antibacterial activity of Cu NPs has been evaluated in vitro against strains of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus). The fabricated Cu NPs show considerable antibacterial activity against both bacterial strains. The bacterial activity of Cu NPs was found to depend on the microbial species.

Key words: Laser-ablated nanoparticles, UV-visible spectrophotometer, Atomic force microscopy (AFM), Escherichia coli, Staphylococcus aureus

Hina Khalid,Shamaila Shamaila,Nosheen Zafar,Rehana Sharif,Jawad Nazir,Mohammad Rafique,Sheeba Ghani,Hussain Saba. Antibacterial Behavior of Laser-Ablated Copper Nanoparticles[J]. Acta Metallurgica Sinica (English Letters), 2016, 29(8): 748-754.

Figures/Tables 7

Fig. 1 Schematic representation of Cu NPs synthesized in deionized water by LASiS

Fig. 2 UV-visible spectra of Cu NPs fabricated by LASiS

Fig. 3 a 2D AFM image, b histogram and c 3D topographical view of Cu NPs (fabricated by LASiS), particle size 14-55 nm

Fig. 4 XRD pattern of the Cu NPs by LASiS

Fig. 5 Graph for growth inhibition of aE. coli, bS. aureus with different concentration of Cu NPs fabricated by LASiS

Fig. 6 Diameter of zone of inhibition: aE. coli, bS.aureus bacteria

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