Title of article :
Photochemical reactions of thiol-terminated self-assembled monolayers (SAMs) for micropatterning of gold nanoparticles and controlled surface functionality
Author/Authors :
Xuemingyue Han، نويسنده , , Kuang-Chong Wu، نويسنده , , Shuqing Sun، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
4
From page :
5153
To page :
5156
Abstract :
This paper reported a facile method for the patterning of gold nanoparticles (AuNPs) on SiO2/Si by combining photochemical reaction and self-assembly techniques, and the conversion of surface functionality through thiol-ene click chemistry. The oxidation of terminal thiols in self-assembled monolayer of (3-mercaptopropyl)trimethoxysilane upon exposure to 254 nm UV light under ambient atmosphere was investigated. Chemically well-defined microstructures were obtained by UV irradiation through a mask, and subsequent immersion of the substrate into a dispersion of AuNPs resulted in site-specific assembly of AuNPs via Au–S covalent bond in the unexposed area. Thiol-ene “click” reaction between surface thiol-group and alkene-containing molecules under illumination of 365 nm UV light was also demonstrated. X-ray photoelectron spectroscopy study indicated the successful conversion of surface functionality.
Keywords :
Thin films , Nanomaterials , Surfaces , Patterning
Journal title :
Applied Surface Science
Serial Year :
2012
Journal title :
Applied Surface Science
Record number :
1004904
Link To Document :
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