Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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The Characteristic Self-assembly of Gold Nanoparticles over Indium Tin Oxide (ITO) Substrate

  • Li, Wan-Chao (Department of Chemical and Bio Engineering, Kyungwon University) ;
  • Lee, Sang-Wha (Department of Chemical and Bio Engineering, Kyungwon University)
  • Received : 2010.09.04
  • Accepted : 2010.10.30
  • Published : 2011.04.20
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Abstract

Ordered array of gold nanoparticles (Au NPs) over ITO glass was investigated in terms of ITO pretreatment, particle size, and diamines with different chain length. Owing to the indium-tin-oxide (ITO) layer coated on the glass, the substrate surface has a limited number of hydroxyl groups which can produce functionalized amine groups for Au binding, which resulted in the loosely-packed array of Au NPs on the ITO surface. Diamine ligand as a molecular linker was introduced to enhance the lateral binding of adjacent Au NPs immobilized on the amine-functionalized ITO glass, consequently leading to the densely-packed array of Au NPs over the ITO substrate. The molecular bridging effect was strengthened with the increase of chain length of diamines: C-12 > C-8. The packing density of small Au NPs (< 40 nm) was significantly increased with the increase of C-8 diamine, but large Au NPs (> 60 nm) did not produce densely-packed array on the ITO glass even for the dosage of C-12 diamine.

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References

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