Abstract:Abstract. This paper presents the simple fabrication of interdigital capacitor (IDC) using print circuit board (PCB) for glucose biosensor. PCB type FR04 laminated with Cu as electrode was used as sensor base. The IDC pattern of sensor was designed by computer aided design program and printed with a laser printer on plastic polymers. Then, the IDC pattern was transferred into PCB by a laminating machine. The etching process of PCB was done by immersing in ferric chloride liquid to form Cu pattern. There were f… Show more
“…Hence, in this paper we present the electrochemical and surface characteristics of the sensing electrodes as received by the manufacturer and also after our surface treatment process. Glucose oxidase is subsequently covalently immobilized on the chemically pre-treated, Au plated working electrodes, as opposed to previously presented PCB-implemented glucose sensors [10][11][12][13], resulting in a lower limit of detection of 500 µM.…”
Here we report the first PCB-implemented electrochemical glucose biosensor usingcovalently immobilized glucose oxidase (GOx) on the commercially fabricated PCB electrodesurface, taking particular care on the electrode surface characteristics and their effect on sensorperformance. Based on the results, this assay exhibits a highly linear response from 500 μM to 20mM (R = 0.9961) and a lower limit of detection of 500 μM.
“…Hence, in this paper we present the electrochemical and surface characteristics of the sensing electrodes as received by the manufacturer and also after our surface treatment process. Glucose oxidase is subsequently covalently immobilized on the chemically pre-treated, Au plated working electrodes, as opposed to previously presented PCB-implemented glucose sensors [10][11][12][13], resulting in a lower limit of detection of 500 µM.…”
Here we report the first PCB-implemented electrochemical glucose biosensor usingcovalently immobilized glucose oxidase (GOx) on the commercially fabricated PCB electrodesurface, taking particular care on the electrode surface characteristics and their effect on sensorperformance. Based on the results, this assay exhibits a highly linear response from 500 μM to 20mM (R = 0.9961) and a lower limit of detection of 500 μM.
“…The samples were then degassed again before being left to cure at room temperature for 8 hours. The design of the IDC sensors was based on [6], [7]. For the IDC, the total capacitance is equal to the sum of the capacitances of the unit cells, and is calculated using the following:…”
Offshore wind turbines are subjected to harsh environmental conditions which can include high temperatures and elevated levels of ambient humidity. Failure of wind turbines can often be the result of damage over time to the power devices used within converters, leading to significant downtime and maintenance costs. The absorption of moisture within the silicone gel used as a dielectric in power modules poses a potential reliability concern due to its altered electrical properties. Samples of a commercial dielectric gel recommended for use in power modules are subjected to harsh environmental conditions consisting of high temperature alone, high humidity alone, and combined high temperature and humidity. The electrical properties of the gel during these tests are measured using bespoke sensors, and the results of this testing are discussed. A notable increase in the capacitance of samples is observed for the combined high-temperature, high-humidity condition.
“…To date, large-volume liquid-level measuring instruments use the interdigital electrode sensor mainly based on their capacitive property [34][35][36][37][38][39]. Generally, this type of sensor is bonded up to a few kHz operational frequency measurement.…”
This paper uses the co-planar interdigital electrode (IDE)
sensor to measure water level. The researchers generally
characterize the interdigital electrode sensor as a fringe field
capacitor sensor developed on the printed circuit board and utilize
the capacitor sensor's properties for liquid-level measurement. The
interdigital electrode sensors illustrate more than one resonance at
the higher frequencies, and in this study, the first resonance
frequency fr
-has been utilized for the water level
measurement. Three water types are examined here: distilled, tap,
and river. The study assesses that with the transition of water, the
permittivity between the electrodes is changed and, it leads to a
change in capacitance hence, the change in resonance frequency was
observed. The proposed sensor can be represented by the lumped
element equivalent series RLC circuit. The developed IDE sensor has
good repeatability, small variability, and small hysteresis
error. The maximum standard error for distilled, tap, and river
water are 0.02833, 0.02503, and 0.02618, respectively, and the
hysteresis error is less than 1.903% of full-scale output
variation. The maximum error for the fr
estimation is about
±2 Hz.
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