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Issue 17, 2010
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Microstructured poly(2-oxazoline) bottle-brush brushes on nanocrystalline diamond

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Abstract

We report on the preparation of microstructured poly(2-oxazoline) bottle-brush brushes (BBBs) on nanocrystalline diamond (NCD). Structuring of NCD was performed by photolithography and plasma treatment to result in a patterned NCD surface with oxidized and hydrogenated areas. Self-initiated photografting and photopolymerization (SIPGP) of 2-isopropenyl-2-oxazoline (IPOx) resulted in selective grafting of poly(2-isopropenyl-2-oxazoline) (PIPOx) polymer brushes only at the oxidized NCD areas. Structured PIPOx brushes were converted by methyl triflate into the polyelectrolyte brush macroinitiator for the living cationic ring-opening polymerization (LCROP) of 2-oxazolines. The LCROP was performed with 2-ethyl-2-oxazoline (EtOx) as well as 2-(carbazolyl)ethyl-2-oxazoline (CarbOx) as monomers, resulting in structured bottle-brush brushes (BBB) with different pendant side chains and functionalities. FT-IR spectroscopy, fluorescence microscopy, and AFM measurements indicated a high side chain grafting density as well as quantitative and selective reactions. Poly(2-oxazoline) BBBs containing hole conducting carbazole moieties on NCD as electrode material may open the way to advanced amperometric biosensing systems.

Graphical abstract: Microstructured poly(2-oxazoline) bottle-brush brushes on nanocrystalline diamond

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Article information


Submitted
11 Nov 2009
Accepted
20 Jan 2010
First published
18 Feb 2010

Phys. Chem. Chem. Phys., 2010,12, 4360-4366
Article type
Paper

Microstructured poly(2-oxazoline) bottle-brush brushes on nanocrystalline diamond

N. A. Hutter, A. Reitinger, N. Zhang, M. Steenackers, O. A. Williams, J. A. Garrido and R. Jordan, Phys. Chem. Chem. Phys., 2010, 12, 4360
DOI: 10.1039/B923789P

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