Preparation of nanostructured tin dioxide semiconductor for use as a mechanical sensor for doped crystals

Abstract

Preparation of transparent conductive films for dioxide By oxidizing tin (Sno2) films Pre-precipitated tin using the oxidation process Rapid thermal (RTO) membranes were prepared Purified by adding a quantity of tin (Sn) powder (25±300) The material that achieves the required thickness nanometers in a basin made of molybdenum. The basin has a perforated cover made of the same material (Mo). To prevent the membrane material from evaporating during the deposition process When the vacuum pressure reaches its maximum value The sedimentation process begins by passing (5x10-5 mbar) The electric current during the basin, knowing that the increase in current is gradual and slow in order to achieve thermal balance inside the bell jar, while monitoring the pressure gauge, because a rapid rise in temperature leads to a large increase in pressure inside the vacuum chamber. The process involved the deposition of tin films. With very high purity, reaching (Sn) the mineral Up to (99.999%) using the sedimentation system Based on Edwards' thermal vacuum type rules Quartz of varying thicknesses, ranging from 50 to 250 nanometers, was then layered onto silicon wafers to achieve optimal conditions for various sensor applications. The research included a study and analysis of the optical and structural properties of the prepared tin dioxide nanofilms. These prepared films were then used under optimal conditions as versatile sensors. A mechanical sensor was designed to monitor the concentration of narcotics in a specific location. The piezoelectric signal is obtained using a transducer that transmits mechanical waves through a cell containing the narcotics. The resulting signal is then received by receivers (the cell is positioned between two terminals: one terminal is a piezoelectric element, and the other is tin dioxide nanoparticles deposited on quartz substrates). The operating frequency range used in this research is between... The tests included (1500-20000 KHz)This research records the first-order resonant frequency of all prepared samples and calculates the damping factor as a function of time. Keywords: Nanofilms, rapid thermal oxidation ratio SnO2, response