Growth of bulk ZnO single crystals via a novel hydrothermal oxidative pressure-relief route

Weiwei Zheng, Fan Guo, Yitai Qian

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


A novel hydrothermal oxidative pressure-relief (HOPR) route has been successfully developed for the growth of high-quality bulk ZnO single crystals, using metallic zinc and H2O2 as the raw materials, at 400°C for 20 h in an alkali solvent. X-ray powder diffraction reveals the ZnO crystals have a wurtzite structure. Two typical morphologies of perfect hexagonal pyramidal and hexagonal prismatic ZnO single crystals, and bidirectional adhesive crystals, are identified by scanning electron microscopy analysis. The average size of the single crystals is ∼ 1.0 mm in length and ∼0.2 mm in diameter. Short hexagonal prismatic, novel polygonal layer-like, and nanowire ZnO crystals are also obtained by altering the reaction conditions, such as the reaction time and the speed of pressure release. The growth mechanism is a spontaneous nucleation and self-growth process. This novel HOPR route gives an alternative choice for obtaining well-crystallized ZnO bulk crystals from solution.

Original languageEnglish (US)
Pages (from-to)331-335
Number of pages5
JournalAdvanced Functional Materials
Issue number2
StatePublished - Feb 2005
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics


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