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Micro-patterns of Au@SiO2 core-shell nanoparticles formed by electrostatic interactions by Youli Qi; Miao Chen; Shan Liang; Wu Yang; Jing Zhao is a Materials Science article available to read on EtoBox.

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In this paper, silica-coated Au nanoparticles (Au@SiO 2 ) were prepared by the technique of vortex mixing. Subsequently, these monodisperse Au@SiO 2 nanoparticles were functionalized by the silane reagents 3-aminopropyltriethoxysilane (APS) and 3-mercaptopropyltriethoxysilane (MPTS) respectively. Then, these NH 2 -terminated and SO 3 2À -terminated Au@SiO 2 nanoparticles were respectively assembled onto the substrates, which have been patterned with different self-assembly monolayers (SAMs), to form close-packed two-dimensional Au@SiO 2 nanoparticle arrays by electrostatic interactions. The morphologies and the optical properties of Au@SiO 2 nanoparticles with different silica-shell thicknesses were characterized by TEM and UV-vis. The compositions and zeta potentials of the functionalized Au@SiO 2 nanoparticles were examined by X-ray photoelectron spectroscopy (XPS) and dynamic light scattering (DLS). The morphologies of the patterns formed on different templates were characterized by atomic force microscopy (AFM).

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Author

Youli Qi; Miao Chen; Shan Liang; Wu Yang; Jing Zhao

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0169-4332)

Published

2008

Language

EN

Field

Materials Science (Physical Sciences)