Layer-dependent morphologies of silver on n-layer graphene

Cheng wen Huang, Hsing Ying Lin, Chen Han Huang, Ren Jye Shiue, Wei Hua Wang, Chih Yi Liu, Hsiang Chen Chui

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The distributions of sizes of silver nanoparticles that were deposited on monolayer, bilayer, and trilayer graphene films were observed. Deposition was carried out by thermal evaporation and the graphene films, placed on SiO2/Si substrates, were obtained by the mechanical splitting of graphite. Before the deposition, optical microscopy and Raman spectroscopy were utilized to identify the number of the graphene layers. After the deposition, scanning electron microscopy was used to observe the morphologies of the particles. Systematic analysis revealed that the average sizes of the nanoparticles increased with the number of graphene layers. The density of nanoparticles decreased as the number of graphene layers increased, revealing a large variation in the surface diffusion strength of nanoparticles on the different substrates. The mechanisms of formation of these layer-dependent morphologies of silver on n-layer graphene are related to the surface free energy and surface diffusion of the n-layer graphene. The effect of the substrate such as SiO2/Si was investigated by fabricating suspended graphene, and the size and density were similar to those of supported graphene. Based on a comparison of the results, the different morphologies of the silver nanoparticles on different graphene layers were theorized to be caused only by the variation of the diffusion barriers with the number of layers of graphene.

Original languageEnglish
Article number618
Pages (from-to)1-6
Number of pages6
JournalNanoscale Research Letters
Volume7
DOIs
Publication statusPublished - 2012 Jan 1

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Graphite
Silver
Graphene
graphene
silver
Nanoparticles
nanoparticles
Surface diffusion
surface diffusion
Substrates
Thermal evaporation
Diffusion barriers
Free energy
Optical microscopy
Raman spectroscopy
Monolayers
graphite
free energy
evaporation
microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Huang, C. W., Lin, H. Y., Huang, C. H., Shiue, R. J., Wang, W. H., Liu, C. Y., & Chui, H. C. (2012). Layer-dependent morphologies of silver on n-layer graphene. Nanoscale Research Letters, 7, 1-6. [618]. https://doi.org/10.1186/1556-276X-7-618
Huang, Cheng wen ; Lin, Hsing Ying ; Huang, Chen Han ; Shiue, Ren Jye ; Wang, Wei Hua ; Liu, Chih Yi ; Chui, Hsiang Chen. / Layer-dependent morphologies of silver on n-layer graphene. In: Nanoscale Research Letters. 2012 ; Vol. 7. pp. 1-6.
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Huang, CW, Lin, HY, Huang, CH, Shiue, RJ, Wang, WH, Liu, CY & Chui, HC 2012, 'Layer-dependent morphologies of silver on n-layer graphene', Nanoscale Research Letters, vol. 7, 618, pp. 1-6. https://doi.org/10.1186/1556-276X-7-618

Layer-dependent morphologies of silver on n-layer graphene. / Huang, Cheng wen; Lin, Hsing Ying; Huang, Chen Han; Shiue, Ren Jye; Wang, Wei Hua; Liu, Chih Yi; Chui, Hsiang Chen.

In: Nanoscale Research Letters, Vol. 7, 618, 01.01.2012, p. 1-6.

Research output: Contribution to journalArticle

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Huang CW, Lin HY, Huang CH, Shiue RJ, Wang WH, Liu CY et al. Layer-dependent morphologies of silver on n-layer graphene. Nanoscale Research Letters. 2012 Jan 1;7:1-6. 618. https://doi.org/10.1186/1556-276X-7-618