Syntheses and stabilization of Copper Nanoparticles

N. Rawalpally, W. Snyder, G. Chumanov
University of South Carolina, US

Keywords: copper nanoparticles, UV-Vis, TEM imaging, stabilization, synthesis

Summary:

Copper nanoparticles synthesized and stabilized via different chemical compounds will be presented. Poly acrylic acid (PAA) and adenine were successfully employed to stabilize copper nanoparticles from copper (I) oxide and copper sulfate in solution. The growth of copper nanoparticles was monitored by UV-Vis and TEM imaging. Both synthesis routes produced an absorption peak between 570 and 600 nm. Copper (1) oxide with PAA produced an absorption stronger, shaper peaks whereas copper sulfate with adenine produced weaker, broader signals indicating that the bond formed between copper and oxygen on PPA is stronger than the bond formed between copper and nitrogen on adenine. In addition, pictorial evidence indicates that copper (1) oxide with PAA retains its green pigment for greater amount of time compared with copper sulfate with adenine which eventually turned clear. While attempting to limit the amount of surfactants in each trial, we can conclude that 0.35 mM of PAA produced peaks with higher intensity compared with the peaks produced by 0.70 mM of PAA. Limiting the amount of adenine had little impact on the intensity of the peaks. Eventually, these improvements will lead to improved and widespread use of copper nanoparticles in biological processes.