Room-temperature deposition of crystalline patterned ZnO films by confined dewetting lithography

S. Sepulveda-Guzman, B. Reeja-Jayan, E. De la Rosa, U. Ortiz-Mendez, C. Reyes-Betanzo, R. Cruz-Silva, M. Jose-Yacaman

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In this work patterned ZnO films were prepared at room-temperature by deposition of ∼5 nm size ZnO nanoparticles using confined dewetting lithography, a process which induces their assembly, by drying a drop of ZnO colloidal dispersion between a floating template and the substrate. Crystalline ZnO nanoparticles exhibit a strong visible (525 nm) light emission upon UV excitation (λ = 350 nm). The resulting films were characterized by scanning electron microscopy (SEM) and atomic force microscope (AFM). The method described herein presents a simple and low cost method to prepare crystalline ZnO films with geometric patterns without additional annealing. Such transparent conducting films are attractive for applications like light emitting diodes (LEDs). As the process is carried out at room temperature, the patterned crystalline ZnO films can even be deposited on flexible substrates.

Original languageEnglish (US)
Pages (from-to)3386-3389
Number of pages4
JournalApplied Surface Science
Volume256
Issue number11
DOIs
StatePublished - Mar 15 2010
Externally publishedYes

Keywords

  • Confined dewetting lithography
  • Microcontact printing
  • Nano-patterning
  • ZnO nanoparticles

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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