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"Soft and rigid" dithiols and Au nanoparticles grafting on plasma-treated polyethyleneterephthalate

Svorcik, Vaclav and Kolska, Zdenka and Kvi­tek, Ondr™ej and Siegel, Jakub and R˜eznickova, Alena and Rezanka, Pavel and Zaruba, Kamil (2011) "Soft and rigid" dithiols and Au nanoparticles grafting on plasma-treated polyethyleneterephthalate. NANOSCALE RESEARCH LETTERS, 6 (1). pp. 1-7. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.nanoscalereslett.com/content/6/1/607

Abstract

Surface of polyethyleneterephthalate (PET) was modified by plasma discharge and subsequently grafted with dithiols (1, 2-ethanedithiol (ED) or 4, 4'-biphenyldithiol) to create the thiol (-SH) groups on polymer surface. This "short" dithiols are expected to be fixed via one of -SH groups to radicals created by the plasma treatment on the PET surface. "Free" -SH groups are allowed to interact with Au nanoparticles. X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and electrokinetic analysis (EA, zeta potential) were used for the characterization of surface chemistry of the modified PET. Surface morphology and roughness of the modified PET were studied by atomic force microscopy (AFM). The results from XPS, FTIR, EA and AFM show that the Au nanoparticles are grafted on the modified surface only in the case of biphenyldithiol pretreatment. The possible explanation is that the "flexible" molecule of ethanedithiol is bounded to the activated PET surface with both -SH groups. On the contrary, the "rigid" molecule of biphenyldithiol is bounded via only one -SH group to the modified PET surface and the second one remains "free" for the consecutive chemical reaction with Au nanoparticle. The gold nanoparticles are distributed relatively homogenously over the polymer surface.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
ID Code:11583
Deposited By:M T V
Deposited On:05 Jan 2012 10:48
Last Modified:05 Jan 2012 10:48

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