Structural- and optical-property characterization of three-dimensional branched ZnO nanospikes

M. Y. Chia, W. S. Chiu, S. N H Daud, P. S. Khiew, Shahidan Radiman, Roslan Abd. Shukor, Muhammad Azmi Abdul Hamid

Research output: Contribution to journalArticle

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Abstract

Current study reports the synthesis of three-dimensional (3-D) ZnO nanospikes with anomalous optical property, where zinc stearate is adopted as a safe, common and low-cost precursor that undergoes thermal pyrolysis under non-hydrolytic approach. High resolution transmission electron microscope (HRTEM) and scanning electron microscope (SEM) result show that the as-synthesized 3-D ZnO nanospikes are constructed by bundle of nanorods that sprout radially outwards in random orientation. The possible growth mechanism is discussed by referring to the microscopy results. X-ray diffraction (XRD) pattern confirms that the nanospikes are highly crystalline, which existed in hexagonal wurtzite crystal structure. Optical absorption characterization shows that the onset absorption for the nanospikes is slightly red-shifted if compared to commercial ZnO and the corresponding bandgap energy is estimated to be 3.1 eV. The photoluminescene (PL) result of ZnO nanospikes indicate that its optical emission exhibits weak UV emission but very intense visible-light emission that ranged from green- up to red-region. The factors that contributed to the intriguing PL characteristic are discussed. Current finding would offer a versatile synthesis scheme in engineering advanced nanostructures with new design that exhibit congruent optical property.

Original languageEnglish
Pages (from-to)185-194
Number of pages10
JournalMaterials Characterization
Volume106
DOIs
Publication statusPublished - 4 Jun 2015

Fingerprint

light emission
Structural properties
Electron microscopes
Optical properties
electron microscopes
optical properties
stearates
Light emission
synthesis
Nanorods
wurtzite
Light absorption
Diffraction patterns
nanorods
bundles
pyrolysis
Nanostructures
Microscopic examination
Energy gap
Pyrolysis

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Structural- and optical-property characterization of three-dimensional branched ZnO nanospikes. / Chia, M. Y.; Chiu, W. S.; Daud, S. N H; Khiew, P. S.; Radiman, Shahidan; Abd. Shukor, Roslan; Abdul Hamid, Muhammad Azmi.

In: Materials Characterization, Vol. 106, 04.06.2015, p. 185-194.

Research output: Contribution to journalArticle

Chia, M. Y. ; Chiu, W. S. ; Daud, S. N H ; Khiew, P. S. ; Radiman, Shahidan ; Abd. Shukor, Roslan ; Abdul Hamid, Muhammad Azmi. / Structural- and optical-property characterization of three-dimensional branched ZnO nanospikes. In: Materials Characterization. 2015 ; Vol. 106. pp. 185-194.
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