Ion Permeability of Polydopamine Films Revealed Using a Prussian Blue-Based Electrochemical Method

Gao, Bowen; Su, Lei; Tong, Ying; Miao, Guowang; Zhang, Xueji

doi:10.1021/jp507617t

Cited by 29 publications

(44 citation statements)

References 34 publications

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“…Quinone-imine and carboxylates may compete with catechols for metal cations and increase binding capacity in PDA since p K a,quinone-imine, carboxylate < p K a,dopamine [ 53 , 55 ]. These species also contribute negative stationary charges in PDA films that can affect ion transport within the film [ 56 , 57 ].…”

Section: Resultsmentioning

confidence: 99%

Calcium-Mediated Control of Polydopamine Film Oxidation and Iron Chelation

Klosterman

Bettinger

2016

IJMS

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The facile preparation of conformal polydopamine (PDA) films on broad classes of materials has prompted extensive research into a wide variety of potential applications for PDA. The constituent molecular species in PDA exhibit diverse chemical moieties, and therefore highly variable properties of PDA-based devices may evolve with post-processing conditions. Here we report the use of redox-inactive cations for oxidative post-processing of deposited PDA films. PDA films incubated in alkaline CaCl2 solutions exhibit accelerated oxidative evolution in a dose-dependent manner. PDA films incubated in CaCl2 solutions exhibit 53% of the oxidative charge transfer compared to pristine PDA films. Carboxylic acid groups generated from the oxidation process lower the isoelectric point of PDA films from pH = 4.0 ± 0.2 to pH = 3.1 ± 0.3. PDA films exposed to CaCl2 solutions during post-processing also enhance Fe2+/Fe3+ chelation compared to pristine PDA films. These data illustrate that the molecular heterogeneity and non-equilibrium character of as-deposited PDA films afford control over the final composition by choosing post-processing conditions, but also demands forethought into how the performance of PDA-incorporated devices may change over time in salt solutions.

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Section: Resultsmentioning

confidence: 99%

Calcium-Mediated Control of Polydopamine Film Oxidation and Iron Chelation

Klosterman

Bettinger

2016

IJMS

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“…At a neutral condition, PDA film on erGO surface possessed negative charges according to Gao etc. al . Fe(CN) 6 3− belongs to anionic family, which indicated that PDA rejected to Fe(CN) 6 3− causing few peak current response leading to higher R ct than GCE from Table .…”

Section: Resultsmentioning

confidence: 99%

“…Ion permselectivity is an important property of the PDA obtained above . Its extensive potential applications include ion‐channel sensors, controlled release systems, surface coatings in chromatographic separations, anticorrosion, and water purification .…”

Section: Introductionmentioning

confidence: 99%

Permselectivity of Electrodeposited Polydopamine/Graphene Composite for Voltammetric Determination of Dopamine

et al. 2019

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A novel permselective film of electrodeposited polydopamine (PDA) on electrochemical reduced graphene oxide (erGO) surface was prepared. The obtained composite films were characterized by atomic force microscope (AFM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The influences of permselectivity with different electropolymerized cycles and concentration of dopamine on electrochemical responses of biomolecules on electrode were investigated. It was found that the composite film held high cationic permeable to dopamine (DA) and good suppression of ascorbic acid (AA) and uric acid (UA) using CV. The anodic peak currents were proportional to dopamine concentration. The significant permselectivity suggested that the PDA/graphene‐modified electrode has opened a new route to high selective dopamine biosensor.

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“…To better understand the electrochemical sensing mechanism, EIS analysis was used to measure the charger transfer resistance at the electrode | electrolyte interface 43 . EIS was performed in 0.5 moL L −1 KCl containing 0.01 moL L −1 Fe(CN) 6 3−/4− as the supporting electrolyte.…”

Section: Resultsmentioning

confidence: 99%

Bare and boron-doped cubic silicon carbide nanowires for electrochemical detection of nitrite sensitively

Yang

Zhang

Hou

et al. 2016

Sci Rep

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Fabrication of eletrochemical sensors based on wide bandgap compound semiconductors has attracted increasing interest in recent years. Here we report for the first time electrochemical nitrite sensors based on cubic silicon carbide (SiC) nanowires (NWs) with smooth surface and boron-doped cubic SiC NWs with fin-like structure. Multiple techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) were used to characterize SiC and boron-doped SiC NWs. As for the electrochemical behavior of both SiC NWs electrode, the cyclic voltammetric results show that both SiC electrodes exhibit wide potential window and excellent electrocatalytic activity toward nitrite oxidation. Differential pulse voltammetry (DPV) determination reveals that there exists a good linear relationship between the oxidation peak current and the concentration in the range of 50–15000 μmoL L−1 (cubic SiC NWs) and 5–8000 μmoL L−1 (B-doped cubic SiC NWs) with the detection limitation of 5 and 0.5 μmoL L−1 respectively. Compared with previously reported results, both as-prepared nitrite sensors exhibit wider linear response range with comparable high sensitivity, high stability and reproducibility.

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Ion Permeability of Polydopamine Films Revealed Using a Prussian Blue-Based Electrochemical Method

Cited by 29 publications

References 34 publications

Calcium-Mediated Control of Polydopamine Film Oxidation and Iron Chelation

Calcium-Mediated Control of Polydopamine Film Oxidation and Iron Chelation

Permselectivity of Electrodeposited Polydopamine/Graphene Composite for Voltammetric Determination of Dopamine

Bare and boron-doped cubic silicon carbide nanowires for electrochemical detection of nitrite sensitively

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