Nanoscale Chemical Imaging of Zinc Oxide Nanowire Corrosion

Cimatu, Katherine; Mahurin, Shannon M.; Meyer, Kent A.; Shaw, Robert W.

doi:10.1021/jp301922a

Cited by 19 publications

(20 citation statements)

References 33 publications

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“…Therefore NP surfaces should be both uncharged and hydrophobic. In addition TMS plays the role of a passivation layer preventing the corrosion of ZnO 28 in NaCl medium. Indeed, without it, the nanopore gets blocked quickly during voltage clamp experiments.…”

Section: Resultsmentioning

confidence: 99%

Ionic transport through sub-10 nm diameter hydrophobic high-aspect ratio nanopores: experiment, theory and simulation

Balme

Picaud

Manghi

et al. 2015

Sci Rep

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Fundamental understanding of ionic transport at the nanoscale is essential for developing biosensors based on nanopore technology and new generation high-performance nanofiltration membranes for separation and purification applications. We study here ionic transport through single putatively neutral hydrophobic nanopores with high aspect ratio (of length L = 6 μm with diameters ranging from 1 to 10 nm) and with a well controlled cylindrical geometry. We develop a detailed hybrid mesoscopic theoretical approach for the electrolyte conductivity inside nanopores, which considers explicitly ion advection by electro-osmotic flow and possible flow slip at the pore surface. By fitting the experimental conductance data we show that for nanopore diameters greater than 4 nm a constant weak surface charge density of about 10−2 C m−2 needs to be incorporated in the model to account for conductance plateaus of a few pico-siemens at low salt concentrations. For tighter nanopores, our analysis leads to a higher surface charge density, which can be attributed to a modification of ion solvation structure close to the pore surface, as observed in the molecular dynamics simulations we performed.

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Section: Resultsmentioning

confidence: 99%

Ionic transport through sub-10 nm diameter hydrophobic high-aspect ratio nanopores: experiment, theory and simulation

Balme

Picaud

Manghi

et al. 2015

Sci Rep

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“…15,16,37 In addition, the HMDS plays an important role by preventing the corrosion of the ZnO coating in the NaCl solution. 38 Indeed, without this coating the ZnO layer is corroded in the NaCl medium. 38 This induces an irreversible nanopore blocking.…”

Section: Resultsmentioning

confidence: 99%

Experimental and simulation studies of unusual current blockade induced by translocation of small oxidized PEG through a single nanopore

Cabello-Aguilar

Chaaya

Picaud

et al. 2014

Phys. Chem. Chem. Phys.

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Detection of a single macromolecule based on the use of artificial nanopores is an attractive and promising field of research. In this work, we report a device based on a 5 nm single nanopore with a high length/diameter ratio, tailored by the track etching and atomic layer deposition techniques. The translocation of neutral polyethylene glycol (PEG) and charged polyethylene glycol-carboxylate (PEG-carboxylate) molecules of low molar masses (200 and 600 g mol(-1)) through this nanodevice was studied. It was shown that charged PEG-carboxylate molecules, which permeate through the pore, promote an unusual blockade of ionic current whereas the neutral PEG molecules do not show such behaviour. The molecular dynamics simulation shows that both neutral and charged PEGs permeate through the nanopore close to its inner surface. The main difference between the two macromolecules is the existence of a structured shell of cations around the charged PEG, which is likely to cause the observed unusual current blockade.

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“…The characterization of the natural inhibitor was performed with the help of the GC-MS technique 29,30 . 14 major compounds were identified in the methanol extract of coriander seeds, as shown in Table 1.…”

Section: Characterization Of Coriander Seed Extractmentioning

confidence: 99%

Improvement in Corrosion Protection of Zinc by A Natural Inhibitor Incorporated with Zinc Oxide Nanoparticles in an Acidic Medium Evaluated using Gravimetric Measurement, Electrochemical Method and Atomic Force Microscopy

Parekh¹,

Ladha²,

Wadhwani³

et al. 2016

Orient. J. Chem

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In this study, the improvement in the corrosion inhibition efficiency of a natural inhibitor (coriander seed extract) incorporated with zinc oxide nanoparticles (np-natural inhibitor) was investigated using the gravimetric method and electrochemical methods. The weight loss method indicated that a 25.7% and 57.1% inhibition efficiency (I%) were found when using 0.66 g/L of natural inhibitor and np-natural inhibitor, respectively. Moreover, as the temperature increases, the I% also increases for both inhibitors, suggesting a chemisorption mechanism. EIS revealed that the polarization resistance value (R p ) of np-natural inhibitor is greater than that of the natural inhibitor, indicated that np-natural inhibitor was more resistive. The Temkin adsorption isotherm gave the best fit for both the inhibitors. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) showed the surface morphology of the zinc metal in the absence and presence of both the inhibitors.

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Nanoscale Chemical Imaging of Zinc Oxide Nanowire Corrosion

Cited by 19 publications

References 33 publications

Ionic transport through sub-10 nm diameter hydrophobic high-aspect ratio nanopores: experiment, theory and simulation

Ionic transport through sub-10 nm diameter hydrophobic high-aspect ratio nanopores: experiment, theory and simulation

Experimental and simulation studies of unusual current blockade induced by translocation of small oxidized PEG through a single nanopore

Improvement in Corrosion Protection of Zinc by A Natural Inhibitor Incorporated with Zinc Oxide Nanoparticles in an Acidic Medium Evaluated using Gravimetric Measurement, Electrochemical Method and Atomic Force Microscopy

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