A green synthesis of copper nanoparticles using native cyclodextrins as stabilizing agents

In this work,a comparative study of the effect of the ncd size as a stabilizing agent,on the synthesis of copper nanoparticles (cu-nps) by an easy green method was reported. the nanoparticles were synthesized through the chemical reduction of aqueous solutions of copper (ii) sulfate with ascorbic acid,using different native cyclodextrins (ncds) (α-,β-,or γ-ncd) as stabilizing agents. cu-nps were characterized by scanning electron microscopy–energy dispersive spectroscopy (sem–edx),powder x-ray diffraction (xrd) and transmission electron microscopy (tem). the pattern showed in the typical selected area electron diffraction (saed) and lattice fringes,evidence that the crystalline structure of cu-nps is face-centered cubic (fcc) with a (1 1 1),(2 0 0) and (2 2 0) lattice planes of cu. the analysis of the tem images show that the size of the cu-nps depends on the type of native cyclodextrin (ncd),also it was observed that the nanoparticles are spherical and with a size between ∼2 and 33 nm. the smaller cu-nps were obtained with α-ncd (mode 4 nm),while the nanoparticles obtained with β-ncd show the narrow size distribution (mode 6.5 nm). the average particle size and particle size distribution of cu-nps depend upon the type of cds. © 2016 king saud university