ZnO formation through decomposition of zinc bis(ethyl acetoacetate) by steaming treatment

  • Ryohei Hayami
  • Nagato Endo
  • Yuta Miyase
  • Kazuki Yamamoto
  • Takahiro GunjiEmail author
Original Paper: Fundamentals of sol−gel and hybrid materials processing


Zinc bis(ethyl acetoacetate) (Zn(etac)2) was steamed with water vapor at various temperatures (40–70 °C). A portion of the ethyl acetoacetato group was dissociated upon steaming Zn(etac)2 at 40 °C. However, zinc oxide (ZnO) was not formed. On steaming at 50 °C, the ethyl acetoacetato group was completely removed. The Zn(etac)2 steamed at 50 °C was attributed to the wurtzite ZnO, but impurity was contaminated. Zn(etac)2 steamed at 60–70 °C was converted into pure wurtzite ZnO powder. The Zn(etac)2 could be decomposed by water vapor; interestingly, wurtzite ZnO powder was formed from Zn(etac)2 by steaming treatment at low temperature. Moreover, a Zn(etac)2 solution was coated on a glass substrate followed by steaming at 70 °C; a thin film showed a transparency and a flat surface.

When zinc bis(ethyl acetoacetate) (Zn(etac)2) undergoes a steaming treatment at 60–70 °C, a wurtzite ZnO powder was formed.


  • Zn(etac)2 was prepared by the reaction of diethylzinc with ethyl acetoacetate.

  • Zn(etac)2 was decomposed in hot water vapor.

  • Zn(etac)2 was converted into wurtzite ZnO powder in water vapor at 60–70 °C.


Zinc β-ketoester complex Low-temperature growth of ZnO FTIR spectra Wurtzite ZnO powder 



Prof. Koji Arimitsu and Mr. Kouta Ooki (Tokyo University of Science) are acknowledged for their assistance with the thickness measurement. Dr. Kazuhiro Sayama (AIST) is greatly acknowledged for providing the AFM instrumentation.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10971_2019_5043_MOESM1_ESM.docx (9.8 mb)
Supplementary Information


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Ryohei Hayami
    • 1
  • Nagato Endo
    • 1
  • Yuta Miyase
    • 1
  • Kazuki Yamamoto
    • 1
  • Takahiro Gunji
    • 1
    Email author
  1. 1.Department of Pure and Applied Chemistry, Faculty of Science and TechnologyTokyo University of ScienceChibaJapan

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