Unraveling the influence of substrate on the growth rate, morphology and covalent structure of surface adherent polydopamine films

Svoboda, Ján; Král, Martin; Dendisová, Marcela; Matějka, Pavel; Pop‐Georgievski, Ognen

doi:10.1016/j.colsurfb.2021.111897

Cited by 25 publications

(18 citation statements)

References 55 publications

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“…KPFM imaging further supported that PDA−Au1h slides contained less aggregated AuNPs (Figure 4a, b), while a layer of AuNPs covered the PDA−Au24h surface with a larger particle diameter (Figure 4c, d). Note, that the nature of the substrate (Si vs. quartz) may influence the outer PDA structure to some extent, which could affect somewhat the AuNP size on its surface [72] . Although in our case the surface coverage is slightly different between the silicon and quartz substrate samples, probably due to moderate variance in the substrate surface polarity, the overall morphology is similar.…”

Section: Resultsmentioning

confidence: 53%

“…Note, that the nature of the substrate (Si vs. quartz) may influence the outer PDA structure to some extent, which could affect somewhat the AuNP size on its surface. [72] Although in our case the surface coverage is slightly different between the silicon and quartz substrate samples, probably due to moderate variance in the substrate surface polarity, the overall morphology is similar. According to the contact potential differences (CPD), which is proportional to the differences in the localized sample and probe work functions, the substrate and the observed particles are dissimilar in their chemical nature.…”

Section: Preparation and Characterization Of Pda-au Composites With D...mentioning

confidence: 52%

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Light‐Induced and Thermal Isomerization of Azobenzenes on Immobilized Gold Nanoparticle Aggregates

et al. 2022

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Morphologically different gold nanoparticle (AuNP) aggregates were prepared on macroscopic surfaces covered with a layer of polydopamine (PDA). The extent of particle aggregation and the particle size distribution could be controlled by the Au(III) reduction times, while the reduction process was triggered solely by the redox active polymer. Shorter reaction times led to smaller particles along with lower levels of aggregation, while longer reductions resulted in larger average particle diameter and heavier aggregation. The prepared surfaces were characterized by UV‐Vis, AFM and KPFM techniques. These surfaces were used as solvent‐free condensed phases to probe the photochemical and thermal isomerization processes of attached azobenzenes with different spacer lengths. Fast and reversible light‐induced switching was observed in each case. The thermal cis‐to‐trans isomerization was found to be accelerated for particle‐bound azobenzenes compared to those in solution.

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Section: Resultsmentioning

confidence: 53%

Section: Preparation and Characterization Of Pda-au Composites With D...mentioning

confidence: 52%

Light‐Induced and Thermal Isomerization of Azobenzenes on Immobilized Gold Nanoparticle Aggregates

et al. 2022

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“…[ 56,67 ] It is, however, apparent that the adhesive strength of poly(dopamine) depends strongly on the type of substrate employed, making it hard to draw general conclusions on the stability of poly(dopamine) layers. [ 51,67,68 ] In this work, the stability against DMSO of the poly(dopamine) layer is highest when this was deposited at pH 7 in the presence of NaIO 4 , and—as shown by a control experiment with twice the amount of NaIO 4 (20 m m )—not affected by the concentration of NaIO 4 , similar to the observation made earlier on the deposition kinetics. Preliminary stability tests were performed on the produced surfaces, which turned out to be remarkably stable upon 24 h exposure to aqueous solutions in the pH range from 1 to 9 (see Figure S16, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…[43,[45][46][47][48][49] To add to the complexity, it has been demonstrated that the chemical structure and morphological features of a poly(dopamine) film are influenced by both the type of substrate and the deposition conditions. [49][50][51][52][53] These properties can be expected to strongly influence the reactivity of the poly(dopamine) toward any subsequent modification steps. Evidently, insight in these factors is of great value for any procedure that involves modification of poly(dopamine) films.…”

Section: Introductionmentioning

confidence: 99%

19 nm‐Thick Grafted‐To Polymer Brushes onto Optimized Poly(Dopamine)‐Coated Surfaces

Teunissen

Smulders

Zuilhof

2023

Adv Materials Inter

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to carefully consider the interactions of the device's interfaces with the complex media it is subjected to. The type of interactions and their extent can be effectively controlled by modification of the surface using polymer chains. Polymer brush coatings, in particular, can be employed to introduce specific surface properties with great accuracy due to extensive control over variables such as brush thickness, grafting density, polymer architecture, and functional groups. [4][5][6] Polymer brush coatings have therefore been used to equip surfaces with, e.g., antifouling, [7][8][9][10][11][12][13][14] lubricating, [15] and/or (thermo)responsive properties. [16] Polymer brushes are most commonly synthesized by a grafting-from procedure, in which the chains are grown bottom-up from surface-bound initiators. [17,18] This approach is primarily selected because high grafting densities and brush thicknesses can be readily achieved. Additionally, the advent of surface-initiated, controlled polymerization techniques that allow for both the presence of water and oxygen has greatly expanded the potential of grafting-from approaches. [10,[19][20][21][22] However, polymer brushes obtained via surface-initiated polymerization are difficult to characterize, and detailed analysis would optimally involve degrafting of the polymer chains. Degrafting reactions typically require harsh conditions that may damage the polymers and, in addition, large surface areas are needed to obtain sufficient amounts of detached polymer for detailed analysis. [23,24] The primary alternative synthesis route toward polymer brushes is the grafting-to approach. [25] This strategy involves the synthesis of desired polymers in solution followed by their attachment to the target substrate. In contrast with surfacegrown polymers, characterization of solution-grown polymers can be easily performed using straightforward analysis techniques. As a result, valuable information such as polymer molecular weight, polydispersity, and, after immobilization, the grafting density of the polymer brush can be routinely determined. The major disadvantage to the grafting-to strategy is the inherent limitation in attainable layer thicknesses, which generally do not exceed 10 nm. [26] That limitation is at least partially the result of the excluded volume of each polymer chain on the surface, which hinders subsequent, incoming polymers to reach reactive sites on the surface. This thickness limitation might hamper several applications, such as optimal antifouling and self-healing performance, and as such is a highly desirable Grafting-to polymer coatings are typically easy to apply, but the thickness of such coatings is typically limited to a few nanometers, which may hamper applications. This paper presents a grafting-to coating approach that yields polymer brushes up to an unprecedented thickness of 19 nm. To this aim, an easy-to-apply poly(dopamine) (PDA) primer layer is optimized. PDA is an easy-to-apply, but highly complex and chemically not well understood primer layer...

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“…[131] Copyright 2021, Elsevier. Substrate dependency [ 131] *45-50 nm in a single deposition step after about 16 h [9] *Possibility of multistep deposition. [ 46,47] E between 3 and 12 GPa, in the dry state, [ 27,[89][90][91] 𝜃 water almost substrate independent [9] *UV-vis spectra, [ 46,74] * 1 H and 13 C NMR [ 26,28] *FTIR of PDA-O 2 on Ge [ 134] *FTIR on different substrates [ 131] *EPR spectra [51] *Impermeability to Fe(CN) 6 4− anions [46] *Reduction of Ag + and Au 3+ [9] Isoelectric point:…”

Section: Surface Dependency On the Morphology And Covalent Structure ...mentioning

confidence: 99%

Experimental Methods to Get Polydopamine Films: A Comparative Review on the Synthesis Methods, the Films’ Composition and Properties

Ball

Hirtzel

Leks

et al. 2023

Macromol. Rapid Commun.

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In 2007, polydopamine (PDA) films were shown to be formed spontaneously on the surface of all known classes of materials by simply dipping those substrates in an aerated dopamine solution at pH = 8.5 in the presence of Tris(hydroxymethyl) amino methane buffer. This universal deposition method has raised a burst of interest in surface science, owing not only to the universality of this water based one pot deposition method but also to the ease of secondary modifications. Since then, PDA films and particles are shown to have applications in energy conversion, water remediation systems, and last but not least in bioscience. The deposition of PDA films from aerated dopamine solutions is however a slow and inefficient process at ambient temperature with most of the formed material being lost as a precipitate. This incited to explore the possibility to get PDA and related films based on other catecholamines, using other oxidants than dissolved oxygen and other deposition methods. Those alternatives to get PDA and related films are reviewed and compared in this paper. It will appear that many more investigations are required to get better insights in the relationships between the preparation method of PDA and the properties of the obtained coatings.

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Unraveling the influence of substrate on the growth rate, morphology and covalent structure of surface adherent polydopamine films

Cited by 25 publications

References 55 publications

Light‐Induced and Thermal Isomerization of Azobenzenes on Immobilized Gold Nanoparticle Aggregates

Light‐Induced and Thermal Isomerization of Azobenzenes on Immobilized Gold Nanoparticle Aggregates

19 nm‐Thick Grafted‐To Polymer Brushes onto Optimized Poly(Dopamine)‐Coated Surfaces

Experimental Methods to Get Polydopamine Films: A Comparative Review on the Synthesis Methods, the Films’ Composition and Properties

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