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Engineering Nitroxide Functional Surfaces Using Bioinspired Adhesion
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DOI：10.1021/acs.langmuir.7b03755.png)
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摘要
En 中文
We pioneer a versatile surface modification strategy based on mussel-inspired oxidative catecholamine polymerization for the design of nitroxide-containing thin polymer films. A 3,4-dihydroxy-L-phenylalanine (L-DOPA) monomer equipped with a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-derived oxidation-labile hydroxylamine functional group is employed as a universal coating agent to generate polymer scaffolds with persistent radical character. Various types of materials including silicon, titanium, ceramic alumina, and inert poly(tetrafluoroethylene) (PTFE) were successfully universal coating coated with poly(DOPA-TEMPO) thin films in a one-step dip-coating procedure under aerobic, slightly alkaline (pH 8.5) conditions. Steadily growing polymer films (similar to 1.1 nm h(-1)) were monitored by ellipsometry, and their thicknesses were critically compared with those obtained from atomic force microscopic cross-sectional profiles. The heterogeneous composition of surface-adherent nitroxide scaffolds examined by X-ray photoelectron spectroscopy was correlated to that examined by in-solution polymer analysis via high-resolution electrospray ionization mass spectrometry, revealing oligomeric structures with up to six repeating units, mainly composed of covalently linked dihydroxyindole along the polymer backbone. Critically, the reversible redox-active character of the nitroxide-containing polymer scaffolds was investigated by cyclic voltammetric measurements, revealing a convenient and facile access route to electrochemically active nitroxide polymer coatings with potential application in electronic devices such as organic radical batteries.
Keyword:
POLYDOPAMINE
POLYMERS
FILM
POLYMERIZATION
DEPOSITION
RADICALS
KINETICS
INSIGHTS
BATTERY
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期刊
IF:
3.9
论文数:
5.4W
被引数:
12.4W
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引用论文
Kinetics of polydopamine film deposition as a function of pH and dopamine concentration: Insights in the polydopamine deposition mechanism聚多巴胺膜沉积的动力学与pH和多巴胺浓度的关系: 聚多巴胺沉积机理的见解
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High resolution mass spectrometric access to nitroxide containing polymers.png)
POLYMER CHEMISTRY
POLYMER CHEMISTRYIF3.9
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