Effects of aging time on microstructure, hydrophobic and optical properties of BiFeO 3 thin films synthesized via sol-gel method

H. Baqiah, Z. A. Talib, A. H. Shaari, M. M. Awang Kechik, J. Y.C. Liew, Noor Baa`Yah Ibrahim

Research output: Contribution to journalArticle

Abstract

BiFeO 3 (BFO) films were synthesized with the sol-gel method followed by the spin coating technique using 2-methoxyethanol as solvent and acetylacetone as chelating agent. The effects of aging time (t = 0, 1, 3, 6 days) of the BFO sol on the microstructure, wettability and optical properties of BFO films were investigated by means of X-ray diffraction (XRD), atomic force microscopy (AFM), contact angle (CA) measurement, Uv-vis and photoluminescence. The crystallinity of films was affected by t. Crystallite size of the films changed slightly in the range of 14.2 – 15.2 nm while the lattice parameters clearly varied with t. The average particle size of BFO films ranged between 45.9 and 52.7 nm while the mean square roughness (R q ) varied between 1.0 and 4.2 nm. The films showed maximum optical transmittance (81 – 90 %) in the range 600 – 800 nm. The band gap of the films was also affected with t, and it has a value of 2.85 to 2.76 eV. The films showed a hydrophobic property with CA ranging between 95.3 to 104.7 °. The best crystallinity, lowest R q and highest E g = 2.85 eV were obtained for the film with t = 1 day. The results demonstrate possible development of a superhydrophobic coating using BiFeO 3 coating.

Original languageEnglish
Pages (from-to)419-426
Number of pages8
JournalJournal of Ceramic Science and Technology
Volume9
Issue number4
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Sol-gel process
Optical properties
Aging of materials
Thin films
Microstructure
Contact angle
Coatings
Coating techniques
Opacity
Spin coating
Polymethyl Methacrylate
Angle measurement
Crystallite size
Chelating Agents
Sols
Chelation
Lattice constants
Wetting
Atomic force microscopy
Photoluminescence

Keywords

  • Aging time
  • Band gap
  • BiFeO films
  • Roughness
  • Wettability

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Effects of aging time on microstructure, hydrophobic and optical properties of BiFeO 3 thin films synthesized via sol-gel method . / Baqiah, H.; Talib, Z. A.; Shaari, A. H.; Awang Kechik, M. M.; Liew, J. Y.C.; Ibrahim, Noor Baa`Yah.

In: Journal of Ceramic Science and Technology, Vol. 9, No. 4, 01.01.2018, p. 419-426.

Research output: Contribution to journalArticle

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