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Reference type: Journal
Authors: Gam-Derouich S, Mahouche-Chergui S, Truong S, Ben Hassen-Chehimi D, Chehimi MM
Article Title: Design of molecularly imprinted polymer grafts with embedded gold nanoparticles through the interfacial chemistry of aryl diazonium salts.
Publication date: 2011
Journal: Polymer
Volume: 52
Issue: (20)
Page numbers: 4463-4470.
DOI: 10.1016/j.polymer.2011.08.007
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0032386111006550

Abstract: A novel strategy is described for the preparation of highly sensitive molecularly imprinted (MIPs) sensors for dopamine. It combines mercaptobenzene diazonium salt as a coupling agent for immobilizing gold nanoparticles to gold electrodes and benzoyl benzene diazonium salt as photoinitiator of radical polymerization at the said gold nanoparticle-decorated gold electrodes. The MIP films were prepared by surface-initiated photopolymerization (SIPP) of methacrylic acid (MAA) as functional monomer (F) for dopamine (DA) the template molecule (T), and ethylene glycol dimethacrylate (EGDMA), the crosslinker (C). Dimethylaniline was employed as a hydrogen donor. The specificity and selectivity were demonstrated by square wave voltammetry (SWV). The detection limit was 0.35 nmol L-1 (0.054 ng mL-1). The sensor layers are stable and adherent to the surface through aryl layers. The originality and advantage of the process lie in the use of aryl diazonium salt as coupling agents for anchroring nanoparticles and MIP layers to the electrode surface in a simple and efficient way which ensures high sensing performance together with good surface-MIP adhesion. The same strategy can be extended to a broad range of templates
Template and target information: dopamine, DA
Author keywords: Aryl diazonium salts, Molecularly imprinted polymer grafts, gold nanoparticles

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