Synthesis of copper nanocolloids using a continuous flow based microreactor

Lei Xu, Jinhui Peng, C. Srinivasakannan, Guo Chen, Amy Q. Shen

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


The copper (Cu) nanocolloids were prepared by sodium borohydride (NaBH 4 ) reduction of metal salt solutions in a T-shaped microreactor at room temperature. The influence of NaBH 4 molar concentrations on copper particle's diameter, morphology, size distribution, and elemental compositions has been investigated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). The ultraviolet-visible spectroscopy (UV-vis) was used to verify the chemical compounds of nanocolloids and estimate the average size of copper nanocolloids. The synthesized copper nanocolloids were uniform in size and non-oxidized. A decrease in the mean diameter of copper nanocolloids was observed with increasing NaBH 4 molar concentrations. The maximum mean diameter (4.25 nm) occurred at the CuSO 4 /NaBH 4 molar concentration ratio of 1:2.

Original languageEnglish (US)
Pages (from-to)1-6
Number of pages6
JournalApplied Surface Science
StatePublished - Nov 15 2015


  • Copper nanocolloids
  • Microreactor
  • Sodium borohydride reduction
  • Synthesis

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films


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