Control of the initial growth in atomic layer deposition of Pt films by surface pretreatment

Jung Joon Pyeon, Cheol Jin Cho, Seung Hyub Baek, Chong Yun Kang, Jin Sang Kim, Doo Seok Jeong, Seong Keun Kim

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The controllability of the nucleation behavior of Pt in atomic layer deposition (ALD) by surface pretreatments with H2O, H2S, and NH3 was investigated. The H2O pretreatment on SiO2 and TiO2 surfaces had little effect on the nucleation of Pt. The H2S pretreatment on the SiO2 and TiO2 surfaces significantly delayed the nucleation of Pt on them, while the NH3 pretreatment on the TiO2 surface led to fluent nucleation of Pt. In particular, a continuous Pt film was successfully formed even at an ultrathin thickness of approximately 2.2 nm by NH3 pretreatment. This work suggests that the pretreatment with H2S and NH3 is an efficient way to control the nucleation of Pt in ALD without the support of any reactive species, such as plasma or O3. Such a strategy enables the easy control of the size and distribution density of Pt nanoparticles for a wide range of applications.

Original languageEnglish
Article number304003
JournalNanotechnology
Volume26
Issue number30
DOIs
Publication statusPublished - 2015 Jul 31

Keywords

  • Pt
  • atomic layer deposition
  • initial growth
  • nucleation behavior
  • surface pretreatment

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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