Self-assembly and tribological properties of a novel organic–inorganic nanocomposite film on silicon using polydopamine as the adhesion layer

Songfeng, E; Shi, Lei; Guo, Zhiguang

doi:10.1039/c3ra45293j

Cited by 14 publications

(1 citation statement)

References 38 publications

(40 reference statements)

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“…Another interesting property of PDA is that it is also able to form coordination bonds with several transition metal species such as titanium(IV) oxide, silver oxide, and ferric ions . Early studies by Wilker et al and Sever et al showed that the adhesive plaques in marine mussels were formed by the cross-linking of catechol-containing proteins with ferric ions. − The degree of cross-linking between catechol groups and ferric ions was subsequently found be dependent on pH, with one ferric ion chelating with one, two, or three catechol groups in pH range of approximately <5.6, 5.6–9.1, and >9.1, respectively. , Mimicking mussel adhesive proteins, ferric ions have been used to cross-link catechol-containing synthetic polymers to produce self-healing hydrogels/networks .…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of Fe(III)–Polydopamine Complex Nanospheres: Morphological Evolution, Mechanism, and Application of the Carbonized Hybrid Nanospheres in Catalysis and Zn–Air Battery

Ang

Tay

et al. 2016

Langmuir

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We report one-pot synthesis of Fe(III)-polydopamine (PDA) complex nanospheres, their structures, morphology evolution, and underlying mechanism. The complex nanospheres were synthesized by introducing ferric ions into the reaction mixture used for polymerization of dopamine. It is verified that both the oxidative polymerization of dopamine and Fe(III)-PDA complexation contribute to the "polymerization" process, in which the ferric ions form coordination bonds with both oxygen and nitrogen, as indicated by X-ray absorption fine-structure spectroscopy. In the "polymerization" process, the morphology of the complex nanostructures is gradually transformed from sheetlike to spherical at the feed Fe(III)/dopamine molar ratio of 1/3. The final size of the complex spheres is much smaller than its neat PDA counterpart. At higher feed Fe(III)/dopamine molar ratios, the final morphology of the "polymerization" products is sheetlike. The results suggest that the formation of spherical morphology is likely to be driven by covalent polymerization-induced decrease of hydrophilic functional groups, which causes reself-assembly of the PDA oligomers to reduce surface area. We also demonstrate that this one-pot synthesis route for hybrid nanospheres enables the facile construction of carbonized PDA (C-PDA) nanospheres uniformly embedded with Fe3O4 nanoparticles of only 3-5 nm in size. The C-PDA/Fe3O4 nanospheres exhibit catalytic activity toward oxygen reduction reaction and deliver a stable discharge voltage for over 200 h when utilized as the cathode in a primary Zn-air battery and are also good recyclable catalyst supports.

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Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of Fe(III)–Polydopamine Complex Nanospheres: Morphological Evolution, Mechanism, and Application of the Carbonized Hybrid Nanospheres in Catalysis and Zn–Air Battery

Ang

Tay

et al. 2016

Langmuir

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Precise Control of Polydopamine Film Formation by Electropolymerization

Stöckle

Meier

et al. 2014

Macromolecular Symposia

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Summary Dopamine offers the possibility to build polymer films on any substrates via an oxidative process. This redox process cannot only be used for self‐oxidation in air, but also in an electrochemical deposition process using cyclic voltammetry. Electropolymerization provides the opportunity to customize film thicknesses on surfaces detectable by X‐ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The topography and nanomechanical properties of the films have been characterized in liquid via AFM. Electrochemical quartz crystal microbalance (EQCM) allows the determination of the deposited polymer quantities during the polymerization process and the ultra‐thin films have been detected by attenuated total reflection Fourier transform infrared spectroscopy (ATR‐FTIR).

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Polydopamine surface functionalized submicron ZnO for broadening the processing window of 3D printable PLA composites

et al. 2023

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The “catalytic degradation” of metal oxides limits the wide application of PLA when PLA needs to be modified by adding metal oxides to achieve desired properties. Zinc oxide (ZnO) is a common and widely used agent as it can be used for many properties, such as antioxidant, antibacterial, etc. However, detrimental effects often exist on the properties of polymers after introducing the ZnO, due to the catalytic degradation. In this study, we used polydopamine (PDA) to construct ZnO@PDA core-shell submicron particles via the self-polymerization of dopamine (DA) in alkaline solution, aimed to produce a surface functionalization that would be used to control the rate of degradation of PLA by ZnO during thermal processing, and promote the preservation of mechanical properties. PLA with different contents of ZnO and ZnO@PDA were prepared by a simple melt extrusion method. The degradation behavior, mechanical properties and antibacterial activity of ZnO/PLA and ZnO@PDA/PLA were investigated. It was found that the incorporation of ZnO@PDA in PLA at different contents exhibits a dramatic control over the degradation rate when compared to that of the ZnO/PLA with the same filler content. Notably, the T5% and T50% of 3%-ZnO@PDA/PLA increased by 36.4 oC and 31.9 oC. GPC results showed the molecular weight of 3%-ZnO@PDA/PLA was only reduced by 15.8% after thermal processing. In addition, 3%-ZnO@PDA/PLA can be 3D-printed smoothly. That is to say, the introduction of ZnO@PDA can increase the processing window of PLA/ZnO composites, providing the possibility for materials that need to be included in civil application. Accordingly, ZnO@PDA/PLA samples showed higher tensile strength and elongation at break than that of corresponding ZnO/PLA samples. Regarding the antibacterial behavior, the ZnO@PDA/PLA have more bacterial growth disability effect against Gram(+) bacteria than that of pure PLA.

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Self-assembly and tribological properties of a novel organic–inorganic nanocomposite film on silicon using polydopamine as the adhesion layer

Cited by 14 publications

References 38 publications

One-Pot Synthesis of Fe(III)–Polydopamine Complex Nanospheres: Morphological Evolution, Mechanism, and Application of the Carbonized Hybrid Nanospheres in Catalysis and Zn–Air Battery

One-Pot Synthesis of Fe(III)–Polydopamine Complex Nanospheres: Morphological Evolution, Mechanism, and Application of the Carbonized Hybrid Nanospheres in Catalysis and Zn–Air Battery

Precise Control of Polydopamine Film Formation by Electropolymerization

Polydopamine surface functionalized submicron ZnO for broadening the processing window of 3D printable PLA composites

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