Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (07): 587-589.doi: 10.3866/PKU.WHXB19950704

• Communication • Previous Articles     Next Articles

Electronic Spin Resonance Properties of ZnO Nanocrystallite

Yu Bao-Long,Zhang Gui-Lan,Tang Guo-Qing,Wu Xiao-Chun,Chen Wen-Ju   

  1. Institute of Modern Optics,Nankai University,Tianjin 300071
  • Received:1995-03-27 Revised:1995-05-18 Published:1995-07-15
  • Contact: Yu Bao-Long

Abstract:

The microemulsion method for preparing ZnO nanocrystallites was reported. Through measuring ZnO microcrystllite ESR spectra, we found that at room temperature it has a significant ESR signal and its intensity descends with the increase of annealed temperature. This result is in contrast with that of bulk ZnO which is a diamagnetic material and no ESR signal. Finally it was found and verified that on the surfaces of ZnO nanocrystallites there are a lot of oxygen vacancies and defects which trap electrons and form paramagnetic centers to provide the observed ESR signal.

Key words: Electronic spin resonance, ZnO nanocrystallite