Impedance spectra analysis of thermoresponsive poly(acryloyl-L-proline methyl ester) gel membrane in LiCl solution

2005 ◽  
Vol 43 (20) ◽  
pp. 2843-2851
Author(s):  
Jinhua Chen ◽  
Masaharu Asano ◽  
Norio Tsubokawa ◽  
Yasunari Maekawa ◽  
Tetsuya Yamaki ◽  
...  
Keyword(s):  
Methyl Ester ◽  
Impedance Spectra ◽  
Spectra Analysis

Synthesis, Electrical Properties and Chemical Stability of BaCe0.7In0.3-xGdxO3-δ

2016 ◽  
Vol 848 ◽  
pp. 401-410 ◽  
Author(s):  
Jia Huan Xu ◽  
Wei Han ◽  
Hui Ding ◽  
Wei Jin Chen ◽  
Jun Xiang
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Chemical Stability ◽  
Perovskite Structure ◽  
Doping Concentration ◽  
Interplanar Spacing ◽  
Sol Gel ◽  
Impedance Spectra ◽  
Spectra Analysis ◽  
Diffraction Angle

In3+, Gd3+ were selected as substitution elements for Ce4+ in order to increase electrical conductivity and chemical stability of BaCeO3. A modified sol-gel method was used to fabricate BaCe0.7In0.3-xGdxO3-δ (x = 0, 0.1, 0.2, 0.3) nanopowders. XRD results indicated that the diffraction angle moved to lower with increase of the Gd3 + doping concentration, so that the interplanar spacing gradually increased. The impedance spectra analysis showed that conductivity first increased (x = 0~0.2) and then decreased with the Gd3 + doping increase. The total conductivities at 800oC were 3.8 × 10-3 S·cm-1 (x = 0), 8.0 × 10-3 S· cm-1 (x = 0.1), 2.5 × 10-2 S· cm-1 (x = 0.2), 1.36 × 10-2 S ·cm-1 (x = 0.3). Chemical stability test in CO2 show that all samples except for x=0.3 sample calcination at 800oC for 2h under 100% CO2 and x=0, 0.1 samples heating in boiling water for 12h kept main perovskite structure. Therefore, x=0.1 sample show better electrical conductivity and chemical stability.

scholarly journals Electrochemical Characteristics of Particulate Matter

2011 ◽  
Vol 7 (-1) ◽  
pp. 19-26 ◽  
Author(s):  
Margarita Baitimirova ◽  
Agnese Osite ◽  
Juris Katkevich ◽  
Arturs Viksna
Keyword(s):  
Particulate Matter ◽  
Double Layer ◽  
Mass Concentration ◽  
Electrochemical Impedance ◽  
Cyclic Voltammograms ◽  
Electrochemical Characteristics ◽  
Impedance Spectra ◽  
Double Layer Capacitance ◽  
Spectra Analysis ◽  
Aerosol Mass Concentration

Electrochemical Characteristics of Particulate Matter The current work is dedicated to electrochemical impedance spectra analysis of the fine and coarse airborne particulate matter sampled on the glass fibre filters in Riga city air. The cyclic voltammograms, impedance spectra and double layer capacitance spectra of particulate matter were obtained after the pre-treatment of samples. The equivalent circuit method and the statistical method were used for impedance spectra analysis. Analyzing the impedance spectra, it was concluded that the impedance of both - fine and coarse particles heated in N2 flow does not change by aerosol mass concentration variations. On the other hand, the impedance of particulate matter heated in O2 flow increases, by increasing PM10 mass concentration. Describing the spectra of double layer capacitance, it was observed that the double layer capacitance of aerosols heated in N2 flow did not change, by mass concentration and size variations. However, by increasing mass concentration of coarse aerosols heated in O2 flow, the double layer capacitance reduced.

scholarly journals Differential impedance spectra analysis reveals optimal actuation frequency in bulk mode acoustophoresis

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Valentina Vitali ◽  
Giulia Core ◽  
Fabio Garofalo ◽  
Thomas Laurell ◽  
Andreas Lenshof
Keyword(s):  
Precise Determination ◽  
Impedance Spectra ◽  
Actuation Frequency ◽  
Spectra Analysis ◽  
Resonance Modes ◽  
Bulk Mode ◽  
Working Frequency ◽  
First Time ◽  
Channel Resonance

AbstractThis work reports a method to select the optimal working frequency in transversal bulk resonator acoustophoretic devices by electrical impedance measurements. The impedance spectra of acoustophoretic devices are rich in spurious resonance peaks originating from different resonance modes in the system not directly related to the channel resonance, why direct measurement of the piezoelectric transducer impedance spectra is not a viable strategy. This work presents, for the first time, that the resonance modes of microchip integrated acoustophoresis channels can be identified by sequentially measuring the impedance spectra of the acoustophoretic device when the channel is filled with two different fluids and subsequently calculate the Normalized Differential Spectrum (NDS). Seven transversal bulk resonator acoustophoretic devices of different materials and designs were tested with successful results. The developed method enables a rapid, reproducible and precise determination of the optimal working frequency.

Determination of Tortuosity Using Impedance Spectra Analysis of Symmetric Cell

2017 ◽  
Vol 164 (11) ◽  
pp. E3329-E3334 ◽  
Author(s):  
Simon Malifarge ◽  
Bruno Delobel ◽  
Charles Delacourt
Keyword(s):  
Impedance Spectra ◽  
Spectra Analysis

Impedance Spectra Analysis of p-Doped Organic Thin Films by Charge Carrier Distribution Evaluation

2019 ◽  
Vol 1 (10) ◽  
pp. 1994-2006
Author(s):  
Victoria Wißdorf ◽  
Markus Frericks ◽  
Michael Tzschoppe ◽  
Paula Connor ◽  
Sebastian Beck ◽  
...  
Keyword(s):  
Thin Films ◽  
Charge Carrier ◽  
Organic Thin Films ◽  
Impedance Spectra ◽  
Carrier Distribution ◽  
Spectra Analysis

In Situ Impedance Spectra Analysis of Lithium-Sulfur Battery Using Sulfolane-Based Super-Concentrated Electrolyte Solution

2021 ◽  
Vol MA2021-02 (1) ◽  
pp. 31-31
Author(s):  
Hikari Watanabe ◽  
Kazuhide Ueno ◽  
Kaoru Dokko ◽  
Isao Shitanda ◽  
Masayoshi Watanabe ◽  
...  
Keyword(s):  
Electrolyte Solution ◽  
Impedance Spectra ◽  
Spectra Analysis ◽  
Lithium Sulfur Battery ◽  
Sulfur Battery ◽  
Lithium Sulfur
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