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Impact of Embedded System-Based Automatic Spin Coating Machine in the Growth of Pure Zinc Oxide and Magnesium Doped Zinc Oxide Thin Films for LPG Gas Sensing Application

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Abstract:

An embedded system-based spin coating machine has been developed to grow thin films. Pure zinc oxide (ZnO) and magnesium-doped zinc oxide (ZnO: Mg) thin films with different doped samples have been prepared using the spin coating technique for LPG gas sensing application. The spin coating machine is fully controlled by a PIC microcontroller (PIC16f877A), which can drive a driver circuit to drive a spinning motor, and ZnO: Mg thin films are deposited using this machine. XRD results indicated that the movie has a hexagonal wurtzite structure with a preferred orientation, and the crystallite size increases with the increasing doping concentration of Mg. The surface morphology investigation shows that grains are irregular in shape, and doping concentrations do not influence the surface morphology. From the TEM image, particle sizes observed ranged between 23 and 28 nm, with an average value of ~25.8 nm. The maximum visible average transmittance was 96% for an optimum Mg doping concentration of 10 wt% %. The investigated DC electrical conductivity of Mg-doped ZnO thin films shows enhanced electrical conductivity compared to pure ZnO, and the AC conductivity is decreased with increasing Mg doping concentrations from 5 to 10 wt%. The operation and sensing mechanism of Pure ZnO and ZnO: Mg thin films behind their impressive results has been studied in depth.

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Periodical:

Solid State Phenomena (Volume 392)

Pages:

19-32

DOI:

https://doi.org/10.4028/p-W1RsHW

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Online since:

April 2026

Authors:

V. Jagadeesan*, K.C. Aravind

Keywords:

Embedded Systems, Magnesium, Spin Coating, Thin Film, Zinc Oxide

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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