Fabrication and luminescence of ZnS

Mn 2+ nanoflowers

Wei Chen, Jan Olov Bovin, Shaopeng Wang, Alan G. Joly, Yuqing Wang, Peter M A Sherwood

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Visually striking nanoflowers composed of ZnS:Mn 2+ nanoparticles are prepared and characterized. The configurations of these fractal structures are very sensitive to both the pH values of the particle solutions from which they are precipitated and the substrates on which they are deposited. At pH 2.2, the fractal structures resemble trees without leaves; at pH 7.7, they are tree-like with four arms and at pH 11.0 they resemble trees with six arms. High resolution transmission microscopy reveals that the nanoflowers are composed of ZnS:Mn 2+ nanoparticles of 2-5 nm in size. X-ray photoelectron spectral data indicate that the sample compositions of nitrogen, chlorine, and sulfur vary gradually with pH values of the solutions. These changes may have an impact on both the fractal configuration and the luminescence properties. The emission spectra of the particle solutions at pH values of 2.2 and 11.0 are similar with the emission maximum at 475 nm. As the pH value approaches 7.7, the emission spectral maximum shifts to longer wavelengths. At a pH value of 7.7, the emission peak wavelength is the reddest, 520 nm. The emission peak of the nanoflowers at a pH value of 9.3 is 510 nm, while the emission spectrum of the nanoflowers at 5.2 has two peaks at 500 nm and 440 nm, respectively. These blue-green emissions are attributed to defects and are the dominant luminescence from the nanoflowers. The emission from Mn 2+ dopant is only observed in the delayed spectra of the fractal solid samples.

Original languageEnglish (US)
Pages (from-to)1309-1322
Number of pages14
JournalJournal of Nanoscience and Nanotechnology
Volume5
Issue number9
DOIs
StatePublished - 2005
Externally publishedYes

Fingerprint

Nanoflowers
Luminescence
Fractals
Fabrication
Nanoparticles
Wavelength
Chlorine
Photoelectrons
Sulfur
Microscopic examination
Nitrogen
Doping (additives)
X rays
Defects
Substrates
Chemical analysis
Microscopy
X-Rays

Keywords

  • Defects
  • Doped Nanoparticles
  • Fabrication
  • Fractal Structures
  • Luminescence
  • Nanoflowers
  • Semiconductors
  • Surfaces
  • ZnS:Mn

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Materials Science (miscellaneous)
  • Engineering (miscellaneous)

Cite this

Chen, W., Bovin, J. O., Wang, S., Joly, A. G., Wang, Y., & Sherwood, P. M. A. (2005). Fabrication and luminescence of ZnS: Mn 2+ nanoflowers. Journal of Nanoscience and Nanotechnology, 5(9), 1309-1322. https://doi.org/10.1166/jnn.2005.302

Fabrication and luminescence of ZnS : Mn 2+ nanoflowers. / Chen, Wei; Bovin, Jan Olov; Wang, Shaopeng; Joly, Alan G.; Wang, Yuqing; Sherwood, Peter M A.

In: Journal of Nanoscience and Nanotechnology, Vol. 5, No. 9, 2005, p. 1309-1322.

Research output: Contribution to journalArticle

Chen, W, Bovin, JO, Wang, S, Joly, AG, Wang, Y & Sherwood, PMA 2005, 'Fabrication and luminescence of ZnS: Mn 2+ nanoflowers', Journal of Nanoscience and Nanotechnology, vol. 5, no. 9, pp. 1309-1322. https://doi.org/10.1166/jnn.2005.302
Chen, Wei ; Bovin, Jan Olov ; Wang, Shaopeng ; Joly, Alan G. ; Wang, Yuqing ; Sherwood, Peter M A. / Fabrication and luminescence of ZnS : Mn 2+ nanoflowers. In: Journal of Nanoscience and Nanotechnology. 2005 ; Vol. 5, No. 9. pp. 1309-1322.
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