Design and simulation of interdigitated electrode for Graphene-SnO2 sensor on acetone gas

Abstract

<span>This paper presents the design and simulation of interdigitated electrode for graphene-SnO2 sensor on acetone gas. This study focuses on designing and simulating a sensor platform based on IDE with different configuration parameters to obtain the most ideal and efficient layout concerning sensitivity. Eventhough the sensor platform can be easily fabricated by using photolithography, screen-printing and other methods, the simulation is preferable as it provides low cost, secure and quick analysis tools with required sensitivity analysis. The design is important before developing a hybrid gas sensor based on metal oxide and graphene to detect acetone for diabetic mellitus at room temperature. IDE is one of the sensor platforms which provide simplicity, miniaturization and offers an economical mass-fabrication as an alternative to large systems for a sensor. The sensitivity of this IDE can be improved by altering the parameters of the IDE configuration. Herein, COMSOL Multiphysics® 5.4 software is used for simulation where the IDE-based sensor is constructed, and the electrical field is simulated with dependence on several parameters such as width, gap, finger's number and thickness of the electrode. The electrical field that is generated by the simulation results were analyzed and discussed to find the ideal design with the highest sensitivity. From the simulation, it was found that the optimum sensitivity with electrical field of 58808 V/m was the design of IDE configuration with 14 fingers, 0.15 mm spacing size between fingers, 0.15 mm width of the finger and 0.7mm thickness of fingers and electrode.</span>

Detection of harmful gases present in the environment

“…They got struck impacts by combining backslide counts with electronic nose guarantees [20]. Hikmah et al also mentioned the z-nose in a study that determines the type of food [21].…”

A high-performance room-temperature NH3 gas sensor based on WO3/TiO2 nanocrystals decorated with Pt NPs

“…47 When the sensor is exposed to NH 3 gas by static volumetric method, O d− on the surface interacts with NH 3 in a redox reaction, releasing captured electrons back into WO 3 . 48 The electrons are transported smoothly out as the thickness of the space charge layers and barrier height decrease, thereby recovering the resistance of the material. 49,50 NH 3 molecules react with oxygen ions on the surface according to the following reaction: For the TW sensor, the enhancement of the NH 3 sensing performance due to TiO 2 decoration is attributed to the heterojunction effect between different semiconductor materials.…”

Platform for Graphene Sensors Using Printed Circuit Boards and Single Board Computers

“…The structure of the IDE essentially creates a network of parallel resistors which is difficult to model analytically [26]. Simulations of graphene IDEs are possible using COMSOL [27], however, simulations for graphene devices are out of the scope of this thesis, as the focus is on design and simulation of the interface.…”