Antimicrobial effect of polydopamine coating on Escherichia coli

Iqbal, Zafar; Lai, Edward P. C.; Avis, Tyler J.

doi:10.1039/c2jm34825j

Cited by 121 publications

(86 citation statements)

References 38 publications

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“…A peak that is common for both dopamine hydrochloride and PD near 1500 cm -1 may be attributed to aromatic regions that are common in both structures. The spectrum for the PD product appears to resemble the spectrum that would be achieved by overlaying the spectra for dopamine hydrochloride and Tris base, and also shows similarity to spectra obtained by Iqbal et al [4] for PD with the 1200-1500 cm -1 region being assigned to C-C, C-O and C-N, and the 3000 cm -1 region assigned to C, N, O and 3500 cm -1 to primary amine stretching which is supportive of PD. There is also similarity to Mei et al's [18] spectrum with a common peak near 1600 cm -1 indicative of aromatic rings.…”

Section: Spectroscopic Analysissupporting

confidence: 50%

“…The mussel adhesive-inspired polydopamine (PD) appears to be an ideal biomaterial coating since it fulfils all these criteria. It exhibits low cytotoxicity [2], antibacterial properties [3,4], promotes cell growth [5][6][7][8], resists corrosion [9], can aid antibiotic release [10,11], is simple to produce with control over film thickness [12] and can be attached to a variety of surfaces including silanes [13], metals [9,14], polymers [7,[15][16][17] dentine [18] and even hair [19].…”

Section: Introductionmentioning

confidence: 99%

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Probing polydopamine adhesion to protein and polymer films: microscopic and spectroscopic evaluation

2017

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Polydopamine has been found to be a biocompatible polymer capable of supporting cell growth and attachment, and to have antibacterial and antifouling properties. Together with its ease of manufacture and application, it ought to make an ideal biomaterial and function well as a coating for implants. In this paper, atomic force microscope was used to measure the adhesive forces between polymer-, protein-or polydopamine-coated surfaces and a silicon nitride or polydopamine-functionalised probes. Surfaces were further characterised by contact angle goniometry, and solutions by circular dichroism. Polydopamine was further characterised with infrared spectroscopy and Raman spectroscopy. It was found that polydopamine functionalisation of the atomic force microscope probe significantly reduced adhesion to all tested surfaces. For example, adhesion to mica fell from 0.27 ± 0.7 to 0.05 ± 0.01 nN nm -1 . The results suggest that polydopamine coatings are suitable to be used for a variety of biomedical applications.

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Section: Spectroscopic Analysissupporting

confidence: 50%

Section: Introductionmentioning

confidence: 99%

Probing polydopamine adhesion to protein and polymer films: microscopic and spectroscopic evaluation

2017

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“…[ 18 ] The Fourier transform infrared (FTIR) spectrum of the nanofi lm showed characteristic vibrations of dopamine-melanin: 3307 ( ν (N H), ν (O H)); 3045, 2925 ( ν (C H)); 1597,1490 ( ν ring (C C), ν ring (C N));1433 ( ν ring (C C)); and 1298 cm −1 ( ν ring (CNC)) (Figure 1 d). These signals were consistent with the previous results for dopamine-melanin nanofi lms formed directly on substrate surface, [ 19 ] indicating that the melanin nanofi lms formed via a similar mechanism.…”

Section: Doi: 101002/admi201500203supporting

confidence: 92%

An Ultrasensitive and Fast Moisture Sensor Based on Self‐Assembled Dopamine–Melanin Thin Films

Wee

Hong

2015

Adv Materials Inter

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biomacromolecule remains a challenge. [ 11 ] Diffi culties associated with the extraction of natural melanin have inspired the development of synthetic melanin, [ 12 ] which can mimic the properties of natural melanin, including its hydrationdependent conducting behavior. For example, the conductivity of 1 mm thick 3,4-dihydroxyphenylalanine (DOPA) melanin pellets was found to be 10 −13 S cm −1 at relative humidity (RH) of 0% and 10 −5 S cm −1 at 100% RH, an eight order of magnitude difference. [ 13 ] Thin fi lms are considered ideal building blocks for constructing miniatured sensing devices due to high surface to volume ratio. However, the preparation of homogeneous melanin thin fi lms at a large scale are extremely diffi cult using conventional solution processing methods due to insolubility of natural and synthetic melanin. [ 6 ] Several attempts have been made to prepare DOPA melanin thin fi lms. For example, ready-made DOPA melanin powders have been used to prepare ammonia-aided melanin aqueous dispersions, which was used to produce DOPA melanin fi lms at a micrometer scale by spin casting. [ 6 ] Synthesized DOPA melanin, soluble in organic solvents such as dimethyl sulfoxide (DMSO) and N , N -dimethyl formamide was also used to produce nanofi lms using spin coating. [ 14 ] A 30 nm thick DOPA melanin nanofi lm spin coated on silicon from DMSO suspension showed about a three order of magnitude change in conductivity on going from 50% RH to 100% RH. [ 15 ] The adhesive proteins secreted by mussels have inspired the design of dopamine-melanin nanofi lms dozens of nanometers thick. [ 16 ] Previous studies have focused mainly on hydration dependence of melanin conductivity (humidity sensitivity), without assessing other parameters critical for practical applications of humidity sensors including response and recovery times, and humidity detection range.This study describes a highly sensitive humidity sensor with rapid response fabricated of self-assembled dopamine-melanin thin fi lms that formed at air/solution interface. These thin fi lms could be transferred to a variety of substrates. Film thickness could be controlled in the nanoscale range by adjusting the reaction times between dopamine monomers and melanin. Examination of the fi lm surface morphology using atomic force microscopy (AFM) showed that the surface was compact and smooth at the nanoscale level. These dopamine-melanin thin fi lm sensor exhibited ultrasensitive and rapid responses to moisture, relatively good reproducibility, and its linear response to RH, allowing their calibration.Dopamine undergoes oxidative polymerization in aqueous solutions in the presence of dissolved oxygen, resulting insoluble melanin aggregates. [ 16 ] In practice, the synthesis of dopamine-melanin starts with deprotonating protonated dopamine (e.g., dopamine hydrochloride), which is chemically stable in air. High-quality melanin thin fi lms were formed at

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“…The PDA coating layer acts as a spacer for the post-modication. 38,39 Besides, surface crosslinked PVP segments on the membrane can also form hydrogen bonds with dopamine to promote the adsorption of PDA, which is in accordance with previous studies. The varied morphological evolutions of the HM, MSiM and MSoM with different deposition times in dopamine solution for 2 h, 8 h and 24 h are shown in Fig.…”

Section: Morphology and Chemistry Of The Au-pda-pvdf Membranessupporting

confidence: 89%

Enhanced catalytic degradation of 4-NP using a superhydrophilic PVDF membrane decorated with Au nanoparticles

Lin

Wang

et al. 2016

RSC Adv.

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Poly(vinylidene fluoride) (PVDF) membranes have been widely applied to treat wastewater, however, the removal of toxic aromatic phenolic compounds remains a technical challenge due to the serious adsorption fouling and difficult degradation. Herein, we aimed to design a superhydrophilic PVDF membrane decorated with Au nanoparticles, which enhanced the rapid degradation of p-nitrophenol (4-NP). The superhydrophilic PVDF membrane with a micro/nano structured surface was decorated with Au nanoparticles via poly(dopamine) (PDA) as a spacer. The influences of membrane affinity (e.g.Hydrophilic Membrane (HM), micro/nano structured superhydrophilic membrane (MSiM), and micro/ nano structured superhydrophobic membrane (MSoM)) on PDA deposition and the subsequent Au decoration were comprehensively investigated. The synthesized Au nanoparticles were characterized using transmission electron microscopy (TEM) and UV-vis absorption spectra. The morphology and composition was evaluated using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Static catalytic experiments demonstrated that MSiM degraded over 90% of 4-NP in 5 minutes with a kinetic reaction rate constant of 47.84 Â 10 À2 min À1 and high stability over 6 cycles. A membrane catalytic reactor (MCR) was designed to realize the continuous catalytic degradation of 4-NP with a kinetic reaction rate constant of 7 Â 10 À2 min À1 .

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Antimicrobial effect of polydopamine coating on Escherichia coli

Cited by 121 publications

References 38 publications

Probing polydopamine adhesion to protein and polymer films: microscopic and spectroscopic evaluation

Probing polydopamine adhesion to protein and polymer films: microscopic and spectroscopic evaluation

An Ultrasensitive and Fast Moisture Sensor Based on Self‐Assembled Dopamine–Melanin Thin Films

Enhanced catalytic degradation of 4-NP using a superhydrophilic PVDF membrane decorated with Au nanoparticles

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