Laser nanostructuring of ZnO thin films

N. Nedyalkov, M. Koleva, R. Nikov, P. Atanasov, Y. Nakajima, A. Takami, A. Shibata, Mitsuhiro Terakawa

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In this work, results on laser processing of thin zinc oxide films deposited on metal substrate are presented. ZnO films are obtained by classical nanosecond pulsed laser deposition method in oxygen atmosphere on tantalum substrate. The produced films are then processed by nanosecond laser pulses at wavelength of 355 nm. The laser processing parameters and the film thickness are varied and their influence on the fabricated structures is estimated. The film morphology after the laser treatment is found to depend strongly on the laser fluence as two regimes are defined. It is shown that at certain conditions (high fluence regime) the laser treatment of the film leads to formation of a discrete nanostructure, composed of spherical like nanoparticles with narrow size distribution. The dynamics of the melt film on the substrate and fast cooling are found to be the main mechanisms for fabrication of the observed structures. The demonstrated method is an alternative way for direct fabrication of ZnO nanostructures on metal which can be easy implemented in applications as resistive sensor devices, electroluminescent elements, solar cell technology.

Original languageEnglish
Pages (from-to)172-176
Number of pages5
JournalApplied Surface Science
Volume374
DOIs
Publication statusPublished - 2016 Jun 30

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Keywords

  • Laser nanostructuring
  • ZnO nanostructures

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

Nedyalkov, N., Koleva, M., Nikov, R., Atanasov, P., Nakajima, Y., Takami, A., ... Terakawa, M. (2016). Laser nanostructuring of ZnO thin films. Applied Surface Science, 374, 172-176. https://doi.org/10.1016/j.apsusc.2015.10.216