Simulation of Interdigitated Electrodes (IDEs) Geometry Using COMSOL Multiphysics

Jun, Liew Qiao; Witjaksono, Gunawan; Hawari, Huzein Fahmi; Zakariya, M. A.

doi:10.1109/icias.2018.8540599

Cited by 18 publications

(12 citation statements)

References 13 publications

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“…Simulation results suggested that size and spacing of electrodes at 100 µm gives the best performance in terms of lowest impedance and highest capacitance because it is desirable for detection in low RH and practical measurement perspective 40,41 . These results were in accordance with the smaller width and smaller spacing criteria 42 . The screen-printing through mask, restricted the resolution of fabrication and optimization of the sensor at 100 µm spacing and width of IDEs, hence the sensor was designed in COMSOL in accordance with the printing limitations as discussed in Section 2 of this paper and sizing optimization is discussed in Supplementary information file.…”

supporting

confidence: 89%

Printable Highly Stable and Superfast Humidity Sensor Based on Two Dimensional Molybdenum Diselenide

Awais

Khan

Hassan

et al. 2020

Sci Rep

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Transition metal dichalcogenides (TMDCs) are promising materials for sensing applications, due to their exceptional high performance in nano-electronics. Inherentely, the chemical and thermal responses of TMDCs are highly stable, hence, they pave way for real time sensor applications. This article proposes inceptively a stable and superfast humidity sensor using two-dimensional (2D) Molybdenum diselenide (MoSe 2) through printed technlogies. The 2D MoSe 2 ink is synthesized through wet grinding to achieve few-layered nano-flakes. Inter digital electrodes (IDEs) are fabricated via screen-printing on Polyethylene terephthalate (PET) substrate and thin film of MoSe 2 nano-flakes is fabricated through spin coating. The impedance and capacitance response are recorded at 1 kHz between temperature levels ranging from 20-30 °C. The impedance and capacitance hysteresis results are recorded <1.98% and <2.36%, respectively, ensuring very good repeatability during humidification and dehumidification. The stability of impedance and capacitance response are recorded with maximum error rate of ~ 0.162% and ~ 0.183%, respectively. The proposed sensor shows fast impedance response time (T res) of ~ 0.96 s, and recovery time (T rec) of ~ 1.03 s, which has T res of ~ 1.87 s, and T rec of ~ 2.13 s for capacitance. It is aimed to develop a high performance and stable humidity sensor for various monitoring applications.

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supporting

confidence: 89%

Printable Highly Stable and Superfast Humidity Sensor Based on Two Dimensional Molybdenum Diselenide

Awais

Khan

Hassan

et al. 2020

Sci Rep

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“…A basic dielectric model was developed for estimating the Pt-IME capacitance for various electrode configurations using a simplified approach based on Jun et al [ 38 ] and Oberländer et al [ 39 ]. The in silico model predicted that the electric field decreases with increasing gap size for the geometries tested here, and the minimum number of fingers was approximately 20 for all geometries ( Supplementary Figure S4 ).…”

Section: Resultsmentioning

confidence: 99%

“…An in silico model (COMSOL Multiphysics, Burlington, MA) of Pt-IME capacitance was developed by combining the model developed by Jun et al [ 38 ] with the model by Oberländer et al [ 39 ] using Equation (1). The model estimated the electric field and used the calculated capacitance (C) to compare with impedance data for various IME geometries.…”

Section: Methodsmentioning

confidence: 99%

Planar Interdigitated Aptasensor for Flow-Through Detection of Listeria spp. in Hydroponic Lettuce Growth Media

Sidhu

Cavallaro

Pola

et al. 2020

Sensors

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Irrigation water is a primary source of fresh produce contamination by bacteria during the preharvest, particularly in hydroponic systems where the control of pests and pathogens is a major challenge. In this work, we demonstrate the development of a Listeria biosensor using platinum interdigitated microelectrodes (Pt-IME). The sensor is incorporated into a particle/sediment trap for the real-time analysis of irrigation water in a hydroponic lettuce system. We demonstrate the application of this system using a smartphone-based potentiostat for rapid on-site analysis of water quality. A detailed characterization of the electrochemical behavior was conducted in the presence/absence of DNA and Listeria spp., which was followed by calibration in various solutions with and without flow. In flow conditions (100 mL samples), the aptasensor had a sensitivity of 3.37 ± 0.21 kΩ log-CFU−1 mL, and the LOD was 48 ± 12 CFU mL−1 with a linear range of 102 to 104 CFU mL−1. In stagnant solution with no flow, the aptasensor performance was significantly improved in buffer, vegetable broth, and hydroponic media. Sensor hysteresis ranged from 2 to 16% after rinsing in a strong basic solution (direct reuse) and was insignificant after removing the aptamer via washing in Piranha solution (reuse after adsorption with fresh aptamer). This is the first demonstration of an aptasensor used to monitor microbial water quality for hydroponic lettuce in real time using a smartphone-based acquisition system for volumes that conform with the regulatory standards. The aptasensor demonstrated a recovery of 90% and may be reused a limited number of times with minor washing steps.

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“…They were manufactured in an environmentally friendly, physical vacuum deposition process (PVD) using silver with high purity (99.99% guaranteed by the Metals Mint Ltd., Poland) as the deposited metal. The authors investigated sensors with silver layers because this metal is known for its antibacterial properties [ 44 ] and as a material which is stable in air with a wide temperature range [ 45 ]. The electrodes were created on a textile composite substrate known on the market as Cordura.…”

Section: Methodsmentioning

confidence: 99%

Prototype of a Textronic Sensor Created with a Physical Vacuum Deposition Process for Staphylococcus aureus Detection

Korzeniewska

Szczęsny

Lipiński

et al. 2020

Sensors

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Staphylococcus aureus is a bacterium which people have been in contact with for thousands of years. Its presence often leads to severe disorders of the respiratory and circulatory systems. The authors of this article present a prototype of a textronic sensor enabling the detection of this bacterium. This sensor was created using a process of physical vacuum deposition on a flexible textile substrate which can be implemented on clothing. With increasing numbers of bacterial colonies, changes in the sensor’s electrical parameters were observed. The sensor’s resistance reduced by 50% and the capacitance more than doubled within the first two days of starting bacterial cultures. Extensive changes in electrical parameters were observed at 100 Hz and 120 Hz of the measurement signal.

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Simulation of Interdigitated Electrodes (IDEs) Geometry Using COMSOL Multiphysics

Cited by 18 publications

References 13 publications

Printable Highly Stable and Superfast Humidity Sensor Based on Two Dimensional Molybdenum Diselenide

Printable Highly Stable and Superfast Humidity Sensor Based on Two Dimensional Molybdenum Diselenide

Planar Interdigitated Aptasensor for Flow-Through Detection of Listeria spp. in Hydroponic Lettuce Growth Media

Prototype of a Textronic Sensor Created with a Physical Vacuum Deposition Process for Staphylococcus aureus Detection

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