Nanopore Size Estimation by Electrochemical Impedance Spectroscopy Analysis

Chien, Ming-Chun; Wang, Gou‐Jen; Yu, Ming-Chang

doi:10.1143/jjap.47.7459

Cited by 8 publications

(4 citation statements)

References 32 publications

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“…However, the fluorescent probe molecules may have an effect on the water properties. Other groups performed the electrical impedance measurement of liquids in nanopores using an alternate current (ac) method. , In these experiments, a voltage was applied to the nanopores using bulk electrodes. However, using this arrangement, signals were obtained from liquids in the nanopores and in the bulk and from the nanopore and electrode materials.…”

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confidence: 99%

Dielectric Constant of Liquids Confined in the Extended Nanospace Measured by a Streaming Potential Method

et al. 2015

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Understanding liquid structure and the electrical properties of liquids confined in extended nanospaces (10-1000 nm) is important for nanofluidics and nanochemistry. To understand these liquid properties requires determination of the dielectric constant of liquids confined in extended nanospaces. A novel dielectric constant measurement method has thus been developed for extended nanospaces using a streaming potential method. We focused on the nonsteady-state streaming potential in extended nanospaces and successfully measured the dielectric constant of liquids within them without the use of probe molecules. The dielectric constant of water was determined to be significantly reduced by about 3 times compared to that of the bulk. This result contributes key information toward further understanding of the chemistry and fluidics in extended nanospaces.

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confidence: 99%

Dielectric Constant of Liquids Confined in the Extended Nanospace Measured by a Streaming Potential Method

et al. 2015

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“…R p and R s show opposite trends and explained as the effect of pore structure parameters of the electrodes on their respective internal resistance per unit electrode geometric area . Available electrolyte ions inside the pores generates an electrical double layer on inner surface of pores which resulted in high impedance inside the pores thus, R p is much larger than R s …”

Section: Resultsmentioning

confidence: 98%

Electrospun carbon nanofiber web electrode: Supercapacitor behavior in various electrolytes

İşmar

Karazehir

Ateş

et al. 2017

J of Applied Polymer Sci

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Carbon nanofibers (CNFs) draw great interest due to their noticeable mechanical, electrochemical, and physical properties. In this study, polyacrylonitrile-based CNFs are obtained via electrospinning technique. Thermal oxidation and low temperature (950 8C) carbonization are applied to the electrospun web in order to achieve CNF. Through the process, Fourier transform infraredattenuated total reflectance spectroscopy and Raman spectroscopic results are investigated. The electrochemical properties of the self-standing CNF webs are examined with electrochemical impedance spectroscopy and cyclic voltammetry. In addition, various electrolyte solutions are studied to investigate the capacitive behavior of CNF webs. Electrolyte type variation has a significant effect on the capacitance results and high capacitance values are achieved in aqueous solution. According to the differing electrolyte types, specific capacitance values (C sp ) are recorded between 204 and 149 F g 21 where maximum specific capacitance is obtained in 0.5 M H 2 SO 4 as 204 F g 21 .

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“…Therefore, R P is much larger than R S . It is also found that both R S and R P decrease with increasing concentration indicating that the nanopore resistance is a function of the electrolyte concentration inside the nanopore, so the high concentration ratio induced by the trans-membrane potential increases the mobility of the charged ions inside the nanopore resulting in a relatively lower electrolyte resistance [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

The Influence of Nanopore Dimensions on the Electrochemical Properties of Nanopore Arrays Studied by Impedance Spectroscopy

Kant

Priest

Shapter

et al. 2014

Sensors

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The understanding of the electrochemical properties of nanopores is the key factor for better understanding their performance and applications for nanopore-based sensing devices. In this study, the influence of pore dimensions of nanoporous alumina (NPA) membranes prepared by an anodization process and their electrochemical properties as a sensing platform using impedance spectroscopy was explored. NPA with four different pore diameters (25 nm, 45 nm and 65 nm) and lengths (5 μm to 20 μm) was used and their electrochemical properties were explored using different concentration of electrolyte solution (NaCl) ranging from 1 to 100 μM. Our results show that the impedance and resistance of nanopores are influenced by the concentration and ion species of electrolytes, while the capacitance is independent of them. It was found that nanopore diameters also have a significant influence on impedance due to changes in the thickness of the double layer inside the pores.

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Nanopore Size Estimation by Electrochemical Impedance Spectroscopy Analysis

Cited by 8 publications

References 32 publications

Dielectric Constant of Liquids Confined in the Extended Nanospace Measured by a Streaming Potential Method

Dielectric Constant of Liquids Confined in the Extended Nanospace Measured by a Streaming Potential Method

Electrospun carbon nanofiber web electrode: Supercapacitor behavior in various electrolytes

The Influence of Nanopore Dimensions on the Electrochemical Properties of Nanopore Arrays Studied by Impedance Spectroscopy

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