Journal
APPLIED SURFACE SCIENCE
Volume 329, Issue -, Pages 337-346Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2014.12.060
Keywords
Diazonium salt; Cyclic olefin copolymer; COC; Grafting; Surface treatment; Interface
Categories
Funding
- INSA Rouen
- Rouen University
- CNRS
- Labex SynOrg [ANR-11-LABX-0029]
- Haute-Normandie region (CRUNCh network) and Grand Evreux Agglomeration
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Covalent immobilization of biomolecules on the surface of cyclic olefin copolymer (COC) is still a tough challenge. We developed a robust method for COC surface grafting through reaction with aryldiazonium. Chemical diazonium reduction generated an aryl radical and the formation of a grafted film layer on the organic surface. We also demonstrated that the chemical reduction of diazonium salt was not sufficient to form a film on the COC surface. UV illumination had to be combined with chemical reduction to graft an aryl layer onto the COC surface. We optimized organic film deposition by using different chemical reducers, different reaction times and reagent proportions. We characterized surface modifications by fluorescence microscopy and contact angle measurements, infrared spectroscopy, X-ray photoemission spectroscopy and Raman spectroscopy, and assessed the topography of the aryl film by atomic force microscopy. This original strategy allowed us to evidence various organic functions to graft biomolecules onto COC surfaces with a fast and efficient technique. (C) 2014 Elsevier B.V. All rights reserved.
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