Controlling the growth and luminescence properties of well-faceted ZnO nanorods

E. De La Rosa, S. Sepúlveda-Guzman, B. Reeja-Jayan, A. Torres, P. Salas, N. Elizondo, M. Jose Yacaman

Research output: Contribution to journalArticlepeer-review

194 Scopus citations

Abstract

In this work, we synthesized ZnO nanorods by a wet chemical process. By varying different parameters of the synthesis process like precursor concentration, solvent used, surfactant, temperature, and reaction time, we were able to control the aspect ratio (l/d) and sharpness factor (S f = h/b) of the rods. Rods with an aspect ratio of ∼20 and a sharpness factor of 10 were repeatedly obtained and characterized from scanning electron microscopy. High-resolution transmission electron microscopy and dark field analysis revealed that nanorods grow as a single crystal along the c axis [0001]. UV and visible emission was obtained in both flat- and sharp-terminated rods. According to the XPS analysis, rods present an excess of Zn 2+ of ∼4% that is responsible for the strong yellow emission band. Such defects were removed by annealing of the sample at 200°C for 2 h. Possible mechanisms of changes in the morphology produced by changes in the synthesis process are also discussed.

Original languageEnglish (US)
Pages (from-to)8489-8495
Number of pages7
JournalJournal of Physical Chemistry C
Volume111
Issue number24
DOIs
StatePublished - Jun 21 2007
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Fingerprint

Dive into the research topics of 'Controlling the growth and luminescence properties of well-faceted ZnO nanorods'. Together they form a unique fingerprint.

Cite this