Structural and optical investigation of zinc oxide nanowalls and applications in pH sensing

Sheng-Po Chang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Zinc oxide (ZnO) nanowalls were grown under an oxygen atmosphere in a furnace tube using zinc powder. The consequences of increasing the growth time and temperature on the structural, and optical properties of the ZnO nanowalls are discussed. The ZnO nanowalls were grown vertically on glass surfaces, preferentially along the c -axis as evident from X-Ray Diffraction (XRD) analysis in every case. The photoluminescence (PL) spectra of the ZnO nanowalls exhibited changes in the emission peaks with increase in growth temperatures. An application of the ZnO nanowalls as a pH sensor is demonstrated. Experimental results revealed that pH sensors fabricated with the ZnO nanowalls demonstrated a change in the current measured through cyclic voltammetry, when the pH was varied from 5 to 11.

Original languageEnglish
Pages (from-to)777-785
Number of pages9
JournalDigest Journal of Nanomaterials and Biostructures
Issue number2
Publication statusPublished - 2014 Jan 1

All Science Journal Classification (ASJC) codes

  • Structural Biology
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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