Abstract
E-mail: Lswha@kyungwon.ac.krReceived September 4, 2010, Accepted October 30, 2010Ordered 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 theglass, the substrate surface has a limited number of hydroxyl groups which can produce functionalized aminegroups for Au binding, which resulted in the loosely-packed array of Au NPs on the ITO surface. Diamineligand as a molecular linker was introduced to enhance the lateral binding of adjacent Au NPs immobilized onthe amine-functionalized ITO glass, consequently leading to the densely-packed array of Au NPs over the ITOsubstrate. 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 ( 60 nm) did not produce densely-packed array on the ITO glass even for thedosage of C-12 diamine.Key Words : ITO Glass, Gold nanoparticles, Diamine ligand, Chain lengthIntroductionThe synthesis and application of gold nanoparticles (AuNPs) are one of the major nanomaterial researches owing tothe new discoveries by interdisciplinary works related toself-assembly, nano-catalysis, bio-imaging, and molecularelectronics.
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