Degradation of polydopamine coatings by sodium hypochlorite: A process depending on the substrate and the film synthesis method

Frari, Doriane Del; Bour, Jérôme; Ball, Vincent; Toniazzo, Valérie; Ruch, David

doi:10.1016/j.polymdegradstab.2012.05.002

Cited by 40 publications

(35 citation statements)

References 17 publications

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“…Epitaxial gold substrates were kept in vertical orientation while immersed in a stirred buffered solution of dopamine hydrochloride (pH 8.5) for an hour and then rinsed with Milli‐Q water (see Experimental Section for more details). AFM imaging of PDA‐coated substrates revealed a rough topography formed by small aggregates deposited on the surface, in agreement with previously reported data (see Supporting Information Figure S4). Afterwards, F – d curves were recorded and represented in the histogram shown in Figure .…”

Section: Resultssupporting

confidence: 91%

Bioinspired Catechol‐Terminated Self‐Assembled Monolayers with Enhanced Adhesion Properties

Guardingo

Bellido

Miralles-Llumà

et al. 2013

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The role of the catechol moiety in the adhesive properties of mussel proteins and related synthetic materials has been extensively studied in the last years but still remains elusive. Here, a simplified model approach is presented based on a self-assembled monolayer (SAM) of upward-facing catechols thiol-bound to epitaxial gold substrates. The orientation of the catechol moieties is confirmed by spectroscopy, which also showed lack of significant amounts of interfering o-quinones. Local force-distance curves on the SAM measured by atomic force microscopy (AFM) shows an average adhesion force of 45 nN, stronger than that of a reference polydopamine coating, along with higher reproducibility and less statistical dispersion. This is attributed to the superior chemical and topographical homogeneity of the SAM coating. Catechol-terminated SAMs are also obtained on high-roughness gold substrates that show the ability to assemble magnetic nanoparticles, despite their lack of enhanced adhesion at the molecular level. Finally, the influence of the catechol group on the formation and quality of the SAM is explored both theoretically (molecular dynamics simulations) and experimentally using direct-write AFM lithography.

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Section: Resultssupporting

confidence: 91%

Bioinspired Catechol‐Terminated Self‐Assembled Monolayers with Enhanced Adhesion Properties

Guardingo

Bellido

Miralles-Llumà

et al. 2013

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“…Indeed, electrochemical impedance spectroscopy measurements indicate that CoP/CNT has a much lower impedance and thus markedly faster HER kinetics than CoP (Figure S7) 27. To further verify this hypothesis, we prepared another control sample using polydopamine (PDA) spheres as a non‐conductive support28 (Figure S8). As expected, the PDA material that had been decorated with small CoP nanocrystals (CoP/PDA) exhibited a much lower HER activity (Figure S9) and a much larger impedance than CoP/CNT (Figure S7).…”

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confidence: 94%

Carbon Nanotubes Decorated with CoP Nanocrystals: A Highly Active Non‐Noble‐Metal Nanohybrid Electrocatalyst for Hydrogen Evolution

et al. 2014

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The development of effective and inexpensive hydrogen evolution reaction (HER) electrocatalysts for future renewable energy systems is highly desired. The strongly acidic conditions in proton exchange membranes create a need for acid-stable HER catalysts. A nanohybrid that consists of carbon nanotubes decorated with CoP nanocrystals (CoP/ CNT) was prepared by the low-temperature phosphidation of a Co 3 O 4 /CNT precursor. As a novel non-noble-metal HER catalyst operating in acidic electrolytes, the nanohybrid exhibits an onset overpotential of as low as 40 mV, a Tafel slope of 54 mV dec À1 , an exchange current density of 0.13 mA cm À2 , and a Faradaic efficiency of nearly 100 %. This catalyst maintains its catalytic activity for at least 18 hours and only requires overpotentials of 70 and 122 mV to attain current densities of 2 and 10 mA cm À2 , respectively.

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“…Also, hydrogen peroxide at low concentration (5 × 10 −3 m ) slowly degrades polydopamine particles over time, and has been used to convert particles into nanodots by disturbing supramolecular interactions in the particles ( Figure ) . Concentrated hydrogen peroxide and other strong oxidizers, such as hypochlorite solutions, are able to rapidly degrade polydopamine coatings …”

Section: Catecholamine Polymers: Chemistry and Structurementioning

confidence: 99%

“…For example, coatings on hydrophobic polymer surfaces are less stable to acid and base than those on hydrophilic polymer surfaces and poly( l ‐DOPA) coatings were more stable than polydopamine to acid and base for both hydrophilic and hydrophobic polymer substrates . Similarly, oxidative stability was also substrate and catecholamine chemistry dependent, with the stability increasing for coatings of nitrodopamine and an anchelin‐like derivative compared to dopamine …”

Section: Catecholamine Polymers: Chemistry and Structurementioning

confidence: 99%

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

Barclay

Hegab

Clarke

et al. 2017

Adv Materials Inter

278

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Almost ten years ago, Lee et al. [13] formulated a universal adhesive coating based on observation of the strong attachment by mussels through their byssal threads to virtually all types of inorganic and organic surfaces. The amino acid compositions of the mussel foot proteins that generate the attachment are rich in catechol and amine groups. [13][14][15] These groups associate under marine conditions, forming strong covalent and noncovalent interactions with substrates. [13] This led to the idea that both catechol and amine groups were crucial in forming robust, wide spectrum adhesive nanolayers [16,17] and consequently dopamine was conceived as a powerful building block for spontaneous deposition of thin polymer films. The dopamine monomer is deposited onto unadulterated surfaces through self-assembly and oxidative cross-linking from mild pH aqueous solution in a rapid reaction. This results in a durable, nanoscale, conformal, and hydrophilic coating that can be readily modified to introduce specific surface chemistries for a particular application. [18][19][20][21][22] These bioinspired, polydopamine materials are chemically and structurally indistinguishable from eumelanins found in the human body, [23,24] providing excellent biocompatibility. Additionally, polydopamine has broad electromagnetic absorption and excellent photothermal energy conversion [25] as well as having ionic-electronic hybrid conductivity. [26] Along with the excellent coating performance, these properties provide a vast array of potential applications for polydopamine materials.In this article, we explain what is known about polydopamine and related catecholamine coatings; their formation, the adhesion mechanism, and their physicochemical properties and we also review the applications of these materials (Figure 1). Since 2011, there have been a number of reviews on this subject matter, including general reviews on the physicochemical properties of polydopamine coatings [11,20,[27][28][29] and their applications. [20,27,30] There are also a number of more specific reviews on the chemical synthesis and modulation of polycatecholamine coatings, [31] the biomedical applications of these coatings, [8,[32][33][34] their electronic properties, [26,35] the use of polydopamine to make films at fluid interfaces, [36] in hierarchically constructed particles, [33] and capsules, [30] exploitation of polycatecholamine coatings in membrane filtration, [37] polydopamine-derived carbon materials, [38] and the use of coordination chemistry in catechol-based materials. [39] Nonetheless, this area of research is growing so rapidly [25,27] that many recent Polydopamine and related polycatecholamines can be easily deposited onto almost any surface from mild, aqueous solution. This results in durable, nanoscale coatings that exhibit high biocompatibility and have useful chemical and electronic properties. Additionally, these materials can be readily chemically and physically modified, and consequently, they are used extensively for surface modification. This ...

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Degradation of polydopamine coatings by sodium hypochlorite: A process depending on the substrate and the film synthesis method

Cited by 40 publications

References 17 publications

Bioinspired Catechol‐Terminated Self‐Assembled Monolayers with Enhanced Adhesion Properties

Bioinspired Catechol‐Terminated Self‐Assembled Monolayers with Enhanced Adhesion Properties

Carbon Nanotubes Decorated with CoP Nanocrystals: A Highly Active Non‐Noble‐Metal Nanohybrid Electrocatalyst for Hydrogen Evolution

Versatile Surface Modification Using Polydopamine and Related Polycatecholamines: Chemistry, Structure, and Applications

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