Hydrothermal-electrochemical synthesis of ZnO nanorods

Seong Kyong Park, Jae Hyoung Park, Ki Young Ko, Sungho Yoon, Kyo Seon Chu, Woong Kim, Young Rag Do

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Vertically aligned ZnO nanorods having high optical quality were prepared by a hydrothermal-electrochemical method. The nanorods were synthesized in a Zn(NO3)2 aqueous solution on Si substrates which were coated with a platinum conducting layer and a ZnO seed layer. They possessed a single-crystal würtzite structure and grew along the c-axis, perpendicular to the substrates. The height and diameter of the ZnO nanorods were up to ̃4.3 μm and 90-150 nm, respectively. The morphological, structural, and photoluminescence properties of the ZnO nanorods were examined with respect to the growth temperature (120-180 °C) and the presence of NaOH additive. The nanorods synthesized at high temperature (180 °C) exhibited a strong UV emission and a weak defect-related visible emission leading to a UV-visible ratio of ̃230. This high optical quality was attributed to the increased growth rate of ZnO nanorods (̃4.3 μm/h) which was caused by the high growth temperature (180 °C). This was based on the fact that the ZnO phase is thermodynamically more favorable than the defect-related Zn(OH)2 phase at higher temperature. Since the growth temperature was compatible with polymer materials, our synthetic method may provide a promising way for fabricating high performance optoelectronic devices on flexible polymer substrates.

Original languageEnglish
Pages (from-to)3615-3620
Number of pages6
JournalCrystal Growth and Design
Volume9
Issue number8
DOIs
Publication statusPublished - 2009 Aug 5

Fingerprint

electrochemical synthesis
Nanorods
nanorods
Growth temperature
Polymers
Substrates
Defects
defects
polymers
optoelectronic devices
Platinum
Optoelectronic devices
temperature
Seed
seeds
Photoluminescence
platinum
Crystal structure
Single crystals
aqueous solutions

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Park, S. K., Park, J. H., Ko, K. Y., Yoon, S., Chu, K. S., Kim, W., & Do, Y. R. (2009). Hydrothermal-electrochemical synthesis of ZnO nanorods. Crystal Growth and Design, 9(8), 3615-3620. https://doi.org/10.1021/cg9003593

Hydrothermal-electrochemical synthesis of ZnO nanorods. / Park, Seong Kyong; Park, Jae Hyoung; Ko, Ki Young; Yoon, Sungho; Chu, Kyo Seon; Kim, Woong; Do, Young Rag.

In: Crystal Growth and Design, Vol. 9, No. 8, 05.08.2009, p. 3615-3620.

Research output: Contribution to journalArticle

Park, SK, Park, JH, Ko, KY, Yoon, S, Chu, KS, Kim, W & Do, YR 2009, 'Hydrothermal-electrochemical synthesis of ZnO nanorods', Crystal Growth and Design, vol. 9, no. 8, pp. 3615-3620. https://doi.org/10.1021/cg9003593
Park, Seong Kyong ; Park, Jae Hyoung ; Ko, Ki Young ; Yoon, Sungho ; Chu, Kyo Seon ; Kim, Woong ; Do, Young Rag. / Hydrothermal-electrochemical synthesis of ZnO nanorods. In: Crystal Growth and Design. 2009 ; Vol. 9, No. 8. pp. 3615-3620.
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