Synthesis of functional ZnO nanowall networks using simple solution etching

Brijesh Kumar, Kyung Sik Shin, Min Su Yi, Sang Yeol Lee, Sang Woo Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We report the synthesis of high quality single crystalline ZnO nanowall networks (NNs) using ammonia solution etching of a ZnO nanowire-nanowall heterojunction (NNH) structure. Synchrotron X-ray diffraction revealed that the full-width-at-half-maximum of the ZnO (0002) peak in the ZnO NN sample was much narrower than that of the ZnO NNH sample. Temperature-dependent photoluminescence (PL) measurements revealed more intense and narrower bound exciton peak emission in the NN sample compared to that in the NNH sample. Moreover, the clear observation of free exciton emission in the PL spectrum of the NN sample, even at temperatures as low as 30 K, suggested incorporation of a small number of impurities into the NN sample. In addition, I-V characteristics confirm the higher conductivity of the ZnO NNs as compared to those of the NNH structures, indicating that the NN sample had a superior crystalline property than NNH sample.

Original languageEnglish
Pages (from-to)5207-5211
Number of pages5
JournalJournal of Nanoscience and Nanotechnology
Volume14
Issue number7
DOIs
Publication statusPublished - 2014 Jul

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • Biomedical Engineering
  • General Materials Science
  • Condensed Matter Physics

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