Amination of surfaces via self-assembly of dopamine

Liu, Ying; Yu, Bo; Hao, Jingcheng; Zhou, Feng

doi:10.1016/j.jcis.2011.06.007

Cited by 29 publications

(26 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can be seen that MAO‐HA coating (Figure A) exhibits a rough surface with the root mean square (RMS) roughness of 553.56 nm, which is normal for the MAO derived coatings . Compared with the MAO‐HA coating, the number of pores on the surface of PDA/MAO‐HA is obviously decreased, and the surface (Figure B) presents lower surface roughness with a RMS roughness of 106.46 nm, which could play a positive role in cell adhesion and longevity . It has been reported that the self‐polymerize of PDA could be accomplished within 6 hours, and the dispersive PDA islands gradually link up into a single stretch, occurring only on the transverse direction .…”

Section: Resultsmentioning

confidence: 96%

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Feng

Zhang

Lei

et al. 2017

Surface & Interface Analysis

View full text Add to dashboard Cite

Magnesium has been suggested as a potential biodegradable metal for the usage as orthopaedic implants. However, high degradation rate in physiological environment remains the biggest challenge, impeding wide clinical application of magnesium‐based biomaterials. In order to reduce its degradation rate and improve the biocompatibility, micro‐arc oxidation coating doped with HA particles (MAO‐HA) was applied as the inner coating, and polydopamine (PDA) film was synthesized by dopamine self‐polymerization as the outer coating. The microstructure evolution of the coating was characterized using scanning electron microscopy (SEM), atomic force microscope (AFM), X‐ray diffraction analyses (XRD), Fourier transform infrared spectroscopy (FT‐IR), and X‐ray photoelectron spectroscopy (XPS). The results showed that PDA film had covered the entire surface of MAO‐HA coating and the pore size of MAO‐HA coating decreased. The root mean square (RMS) roughness of PDA/MAO‐HA coatings was approximately 106.46 nm, which was closer to the optimum surface roughness for cellular attachment as compared with MAO‐HA coatings. Contact angle measurement indicated that the surface wettability had been transformed from hydrophobic to hydrophilic due to the introduction of PDA. The PDA/MAO‐HA coatings exhibited better corrosion resistance in vitro, with the self‐corrosion potential increasing by 150 mV and the corrosion current density decreasing from 2.09 × 10−5 A/cm2 to 1.46 × 10−6 A/cm2. In hydrogen evolution tests, the corrosion rates of the samples coated with PDA/MAO‐HA and MAO‐HA were 4.40 and 5.95 mm/y, respectively. MTS assay test and cell‐surface interactions experiment demonstrated that PDA/MAO‐HA coatings exhibited good cellular compatibility and could promote the adhesion and proliferation of MC3T3‐E1 cells.

show abstract

Section: Resultsmentioning

confidence: 96%

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Feng

Zhang

Lei

et al. 2017

Surface & Interface Analysis

View full text Add to dashboard Cite

show abstract

“…The XPS survey shows N 1 s and C 1 s peaks (Figure 2c) that are higher than those of the -NH 2 -Si sample (Figure 2b). Also, Si 2 s and Si 2 p peaks disappeared in the DOPA-Si sample because of the thickness of the DOPA film, implying the well-formed DOPA layer with self-assembled monolayer [45-47]. …”

Section: Resultsmentioning

confidence: 99%

Nanomechanical characterization of chemical interaction between gold nanoparticles and chemical functional groups

Lee

Nam

et al. 2012

Nanoscale Res Lett

View full text Add to dashboard Cite

We report on how to quantify the binding affinity between a nanoparticle and chemical functional group using various experimental methods such as cantilever assay, PeakForce quantitative nanomechanical property mapping, and lateral force microscopy. For the immobilization of Au nanoparticles (AuNPs) onto a microscale silicon substrate, we have considered two different chemical functional molecules of amine and catecholamine (here, dopamine was used). It is found that catecholamine-modified surface is more effective for the functionalization of AuNPs onto the surface than the amine-modified surface, which has been shown from our various experiments. The dimensionless parameter (i.e., ratio of binding affinity) introduced in this work from such experiments is useful in quantitatively depicting such binding affinity, indicating that the binding affinity and stability between AuNPs and catecholamine is approximately 1.5 times stronger than that between amine and AuNPs. Our study sheds light on the experiment-based quantitative characterization of the binding affinity between nanomaterial and chemical groups, which will eventually provide an insight into how to effectively design the functional material using chemical groups.

show abstract

“…As shown in Fig. 29 Therefore, we can conclude that the Fc-dopamine monolayer was formed onto the mica substrate. Aer modication with Fcdopamine (48 h), small grains with heights ranging from 0.7 to 1 nm are seen uniformly distributed over the whole mica surface, and the rms roughness of 0.236 nm was obtained from the AFM image in Fig.…”

Section: Resultsmentioning

confidence: 63%

Self-assembly of catecholic ferrocene and electrochemical behavior of its monolayer

Qian

Wang

et al. 2015

RSC Adv.

Self Cite

View full text Add to dashboard Cite

Self-assembly of catecholic ferrocene was studied on different surfaces. The self-assembly kinetics of Fcterminated (Fc-dopamine) self-assembled monolayers (SAMs) and their stability have been studied and characterized using atomic force microscopy (AFM) and cyclic voltammetry (CV), respectively. AFM images have revealed that the self-assembly process of Fc-dopamine molecules on a mica surface follows the systematic increase of surface coverage with assembly time until a closely packed density is reached. The redox behavior of the Fc-dopamine monolayer in NaClO 4 electrolyte solutions was characterized using CV, and the stability of the Fc-dopamine SAMs on an Au surface at different pH values and voltages was evaluated. CV results show that the Fc-dopamine SAMs are stable over a scan voltage range of À0.8-1.0 V under pH values lower than 11, but very rapidly destroyed above pH 11. Finally, the wetting behavior of the Fc-dopamine grafted on rough surfaces is tuned by a redox reaction of the Fc group in SAMs, which exhibits superhydrophobicity with a static water contact angle of 161 on anodized alumina surfaces, and hydrophilicity with a CA of 5 after Fc is oxidized. The work provides useful information for understanding the adhesion and deposition mechanisms of catecholic compounds on substrates.Scheme 1 The synthetic pathway to the Fc-dopamine compound.This journal is

show abstract

Amination of surfaces via self-assembly of dopamine

Cited by 29 publications

References 56 publications

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Characterization and cytocompatibility of polydopamine on MAO‐HA coating supported on Mg‐Zn‐Ca alloy

Nanomechanical characterization of chemical interaction between gold nanoparticles and chemical functional groups

Self-assembly of catecholic ferrocene and electrochemical behavior of its monolayer

Contact Info

Product

Resources

About