Open Access

Fabrication of CuO nanoparticle interlinked microsphere cages by solution method

  • Jian Quan Qi1, 2Email author,
  • Hu Yong Tian2,
  • Long Tu Li1 and
  • Helen Lai Wah Chan2
Nanoscale Research Letters20072:107

DOI: 10.1007/s11671-007-9039-7

Received: 21 November 2006

Accepted: 4 January 2007

Published: 3 February 2007


Here we report a very simple method to convert conventional CuO powders to nanoparticle interlinked microsphere cages by solution method. CuO is dissolved into aqueous ammonia, and the solution is diluted by alcohol and dip coating onto a glass substrate. Drying at 80 °C, the nanostructures with bunchy nanoparticles of Cu(OH)2can be formed. After the substrate immerges into the solution and we vaporize the solution, hollow microspheres can be formed onto the substrate. There are three phases in the as-prepared samples, monoclinic tenorite CuO, orthorhombic Cu(OH)2, and monoclinic carbonatodiamminecopper(II) (Cu(NH3)2CO3). After annealing at 150 °C, the products convert to CuO completely. At annealing temperature above 350 °C, the hollow microspheres became nanoparticle interlinked cages.


CuO Microsphere Narnoparticle


Authors’ Affiliations

Department of Materials Sciences and Engineering, Tsinghua University
Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University


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© To the authors 2007