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

Bulletin of the Korean chemical society

Wan Chao Li¹  Sang Wha Lee¹ 

关键词: ITO Glass;    Gold nanoparticles;    Diamine ligand;    Chain length;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

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 substrate. The molecular bridging effect was strengthened with the increase of chain length of diamines: C-12 > C-8 > C-4. The packing density of small Au NPs (< 40 nm) was significantly increased with the increase of diamine dosages, but large Au NPs (> 60 nm) did not produce densely-packed array on the ITO glass even for longer chain length of C-12 diamine.

【 授权许可】

Unknown