Atomic layer deposition of 1D and 2D nickel nanostructures on graphite

Seung Wook Ryu, Jaehong Yoon, Hyoung Seok Moon, Bonggeun Shong, Hyungjun Kim, Han Bo Ram Lee

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8 Citations (Scopus)

Abstract

One-dimensional (1D) nanowires (NWs) and two-dimensional (2D) thin films of Ni were deposited on highly ordered pyrolytic graphite (HOPG) by atomic layer deposition (ALD), using NH3 as a counter reactant. Thermal ALD using NH3 gas forms 1D NWs along step edges, while NH3 plasma enables the deposition of a continuous 2D film over the whole surface. The lateral and vertical growth rates of the Ni NWs are numerically modeled as a function of the number of ALD cycles. Pretreatment with NH3 gas promotes selectivity in deposition by the reduction of oxygenated functionalities on the HOPG surface. On the other hand, NH3 plasma pretreatment generates surface nitrogen species, and results in a morphological change in the basal plane of graphite, leading to active nucleation across the surface during ALD. The effects of surface nitrogen species on the nucleation of ALD Ni were theoretically studied by density functional theory calculations. Our results suggest that the properties of Ni NWs, such as their density and width, and the formation of Ni thin films on carbon surfaces can be controlled by appropriate use of NH3.

Original languageEnglish
Article number115301
JournalNanotechnology
Volume28
Issue number11
DOIs
Publication statusPublished - 2017 Feb 13

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All Science Journal Classification (ASJC) codes

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

Cite this

Ryu, S. W., Yoon, J., Moon, H. S., Shong, B., Kim, H., & Lee, H. B. R. (2017). Atomic layer deposition of 1D and 2D nickel nanostructures on graphite. Nanotechnology, 28(11), [115301]. https://doi.org/10.1088/1361-6528/aa5aec