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Proceedings Paper

A study on self-assembled activation by Pd/Sn colloids
Author(s): Guixiang Wang; Ning Li; Guojun Dong
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Paper Abstract

3-Aminopropyltriethoxysilane (APTS) was used to form self-assembled molecular layers on ABS plastics surface and changed surface electrification. The processes were investigated by X-ray photoelectron spectra (XPS). After APTS treatment, the surface has some hydroxyl group which has hydrophilicity and the contact angle of ABS surface reduced. APTS-modified ABS surface has C, O, N and Si element and the results show that APTS was bonded on ABS surface. It was turned out that N and O element formed chemical bond with the ABS surface. The outermost electron configuration of Pd2+ is 4d85s0p0 and adopted dsp2 hybridization commonly. The electron wasn't filled with d orbital. O has two lone pair electrons while N has one lone pair electron, which can place the Pd vacancy orbital forming O-Pd or N-Pd σcoordinate bond. Based on XPS result, we proposed the mechanism for hydrolyzing of APTS in alcohol solution, APTS adsorbing on ABS plastics surface and its effect in activation process. After APTS hydrolyzed in water solution and forms 3-Aminopropyltrihydroxysilane which condensed in alcohol solution at 65°C and forming copolymer. The copolymer self-assembled on ABS surface and after hydrolyzing can form --O-- bond which react with Pd0 in succedent steps. After modification with APTS, the amount of adsorption of Pd/Sn colloids increased from 0.95mg/dm2 to 1.07mg/dm2.

Paper Details

Date Published: 31 October 2007
PDF: 7 pages
Proc. SPIE 6423, International Conference on Smart Materials and Nanotechnology in Engineering, 64234O (31 October 2007); doi: 10.1117/12.780304
Show Author Affiliations
Guixiang Wang, Harbin Engineering Univ. (China)
Ning Li, Harbin Institute of Technology (China)
Guojun Dong, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 6423:
International Conference on Smart Materials and Nanotechnology in Engineering
Shanyi Du; Jinsong Leng; Anand K. Asundi, Editor(s)

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