Electrical Characterization of Semiconductor Oxide-Based Gas Sensors Using Impedance Spectroscopy: A Review

Schipani, Federico; Miller, Donald B.; Ponce, Miguel Adolfo; Aldao, C. M.; Akbar, Sheikh A.; Morris, Patricia A.

doi:10.1166/rase.2016.1109

Cited by 51 publications

(47 citation statements)

References 3 publications

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“…As shown in figure 4(a), the impedance modulus decreases with an increase in frequency which is an indication of mix capacitive and resistive behavior [17]. Also, by increasing frequency, the phase difference plot moves toward a lower angle.…”

Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 82%

“…Alternative current (AC) measurement which is rarely used by researchers can give the same information as DC measurement. Besides, it clarifies the contribution from the bulk, surfaces and interfaces, grain boundaries, electrode contacts and even substrate whether it is polycrystalline material or single-crystal structure such as nanowires and nanorods [17]. Bode plot includes the modulus (|Z|) and phase (Ө) and Nyquist plot includes the imaginary (Z′) and real components (Z′).…”

Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 99%

“…The relaxation frequency is defined as the value where the charge carriers have to overcome the impedances of two different regions of the bulk and the boundaries. Also, a circuit has a relaxation frequency at the value where the currents switch from one element of the circuit to the other [17]. The semicircle impedance spectroscopy (Nyquist plot) in figure 4(c) shows the imaginary part of the impedance (- Z ) versus the real part, ( ¢ Z ) with a center depressed below the real axis.…”

Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 99%

“…The equivalent electrical circuit includes a resistor (R) in parallel with a capacitor (C), each representing a physical part of the device that has resistance and an alternating-current capacitance. In an ideal case, the Nyquist plot can take the form of a series of semicircles each representing one separate electrical phenomena attributed to the bulk material, grain boundary effects and the electrode phenomena [17]. Also, each semicircular arc has a characteristic maximum occurring at a unique relaxation frequency.…”

Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 99%

“…Alternative current (AC) measurement which is rarely used by researchers can give the same information as DC measurement, but also allow understanding contributions from the bulk, surfaces and interfaces, grain boundaries, electrode contacts and even substrate whether we work with polycrystalline materials or single-crystal structures such as nanowires and nanorods [17]. Impedance spectroscopy (IS) is known as a powerful measurement technique in understanding the mechanism of interactions based on a physical and chemical process that affects the electronic behavior of the materials [17][18][19][20][21][22][23][24]. A small AC voltage with variable frequency will be applied to measure the impedance that is defined as the ratio of the complex voltage to the complex current.…”

Section: Introductionmentioning

confidence: 99%

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Room temperature selective sensing of aligned Ni nanowires using impedance spectroscopy

Mohammadi

Fardindoost

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et al. 2020

Mater. Res. Express

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Room temperature gas sensing behavior of arrayed one-dimensional (1D) nickel nanowires (Ni NWs) are investigated using impedance spectroscopy. Ni nanowires synthesized via electrochemical deposition method based on anodic aluminum oxide (AAO) templates. Their structural characterization verified by scanning electron microscopy (SEM), x-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR) analysis. Impedance spectroscopy as an essential technique utilized to understand the mechanism of gas interaction with the wires through the changes in their electronic behavior. Bode and Nyquist plots with the real and imaginary impedances are plotted versus frequency range of 500 Hz to 2 MHz at different relative humidity values (varying from 30% to 70%) and ethanol vapor concentrations (varying from 2 to 18 ppm). The equivalent circuits are proposed and simulated for impedance responses to both humidity and ethanol vapors. The impedance plots indicate the increase in resistance of the aligned nanowires at low frequencies by the adsorption of water and ethanol molecules.

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Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 82%

Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 99%

Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 99%

Section: Impedance Spectroscopy 321 Humidity Sensingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Room temperature selective sensing of aligned Ni nanowires using impedance spectroscopy

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Mater. Res. Express

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3D Printed Design‐Assisted Multilayered Graphene Oxide‐Modified Polymer Glucose Sensor

Das,

Chugh

et al. 2023

Adv Eng Mater

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This work investigates the capabilities of a platform for nonenzymatic glucose sensing employing a novel 3D printed three‐electrode mask‐embedded design. A reservoir‐on‐mask has been fabricated for smart sample insertion to avoid spillage. Working and counter silver electrodes are modified with three different material combinations such as graphene oxide (GO), poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), and GO + PEDOT:PSS, and their performance comparison is demonstrated. It is observed that the GO + PEDOT:PSS modification shows 94.57 and 71.01% higher sensitivity than GO and PEDOT:PSS, respectively, including a higher linearity compared to its counterparts. Glucose concentrations ranging from 50 to 300 mg dL−1are detected by employing cyclic voltammetry and electrical impedance spectroscopic technique. Herein, a significantly high sensitivity of 18.8 μAmM−1 cm−2and low limit of detection ≈ 0.4 mM has been achieved for the proposed sensor. The 3D printed mask structure provides 75% higher sample retention ability, greater reliability in terms of sample placement in the sensor and improved test performances. The proposed sensor can provide a stable and large‐scale deployable solution to future biosensing platforms.

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Single Bimodular Sensor for Differentiated Detection of Multiple Oxidative Gases

Zhang

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2020

Adv Materials Technologies

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Semiconductive metal-oxide sensors suffer from cross-sensitivities under mixed chemical condition, specifically upon mixture of multiple oxidative or reducive gases. Herein, a single bimodular sensor has been demonstrated for smart differentation of multiple oxidative analytes by relating the resistance-metric mode to impedance-metric mode. The sensor construct based on ZnO nanorods readily outputs three response datasets upon exposure of oxidative-gas mixture including O 2 , SO 2 , and NO 2 , the resistance, real part impedance, and imaginary part impedance. The differentiative and correlated nature between these response signals allows such a single sensor platform to differentiate these oxidative gases accurately and robustly. Linear and non-linear decision boundaries were established over a large gas-concentration range from 2 ppm to 3 % through a combination of principal component analysis and artificial neural network training. A facile user interface was demonstrated for recognition and measurement of unknown gas analytes, with the error of the predicted analyteconcentration as low as 2 %.

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Electrical Characterization of Semiconductor Oxide-Based Gas Sensors Using Impedance Spectroscopy: A Review

Cited by 51 publications

References 3 publications

Room temperature selective sensing of aligned Ni nanowires using impedance spectroscopy

Room temperature selective sensing of aligned Ni nanowires using impedance spectroscopy

3D Printed Design‐Assisted Multilayered Graphene Oxide‐Modified Polymer Glucose Sensor

Single Bimodular Sensor for Differentiated Detection of Multiple Oxidative Gases

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