ZnO Korean source hexagonal β Korean source Ni(OH)2 Korean source

Translated title of the contribution: Synthesis of hexagonal β-Ni(OH)2 nanosheet as a template for the growth of ZnO nanorod and microstructural analysis

Sung Hwan Hwang, Tae Il Lee, Ji Hyuk Choi, Jae Min Myoung

Research output: Contribution to journalArticle

Abstract

As a growth-template of ZnO nanorods (NR), a hexagonal β-Ni(OH)2 nanosheet (NS) was synthesized with the low temperature hydrothermal process and its microstructure was investigated using a high resolution scanning electron microscope and transmission electron microscope. Zinc nitrate hexahydrate was hydrolyzed by hexamethylenetetramine with the same mole ratio and various temperatures, growth times and total concentrations. The optimum hydrothermal processing condition for the best crystallinity of hexagonal β-Ni(OH)2 NS was determined to be with 3.5 mM at 95°C for 2 h. The prepared Ni(OH)2 NSs were two dimensionally arrayed on a substrate using an air-water interface tapping method, and the quality of the array was evaluated using an X-ray diffractometer. Because of the similarity of the lattice parameter of the (0001) plane between ZnO (wurzite a = 0.325 nm, c = 0.521 nm) and hexagonal β-Ni(OH)2 (brucite a = 0.313 nm, c = 0.461 nm) on the synthesized hexagonal β-Ni(OH)2 NS, ZnO NRs were successfully grown without seeds. At 35 mM of divalent Zn ion, the entire hexagonal β-Ni(OH)2 NSs were covered with ZnO NRs, and this result implies the possibility that ZnO NR can be grown epitaxially on hexagonal β-Ni(OH)2 NS by a soluble process. After the thermal annealing process, β-Ni(OH)2 changed into NiO, which has the property of a p-type semiconductor, and then ZnO and NiO formed a p-n junction for a large area light emitting diode.

Original languageKorean
Pages (from-to)111-114
Number of pages4
JournalKorean Journal of Materials Research
Volume21
Issue number2
DOIs
Publication statusPublished - 2011 Feb 1

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Nanosheets
Nanorods
Electron microscopes
Magnesium Hydroxide
Methenamine
Diffractometers
Growth temperature
Lattice constants
Light emitting diodes
Seed
Nitrates
Zinc
Annealing
Ions
Semiconductor materials
Scanning
X rays
Microstructure
Water
Substrates

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Hwang, Sung Hwan ; Lee, Tae Il ; Choi, Ji Hyuk ; Myoung, Jae Min. / ZnO Korean source hexagonal β Korean source Ni(OH)2 Korean source. In: Korean Journal of Materials Research. 2011 ; Vol. 21, No. 2. pp. 111-114.
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ZnO Korean source hexagonal β Korean source Ni(OH)2 Korean source. / Hwang, Sung Hwan; Lee, Tae Il; Choi, Ji Hyuk; Myoung, Jae Min.

In: Korean Journal of Materials Research, Vol. 21, No. 2, 01.02.2011, p. 111-114.

Research output: Contribution to journalArticle

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