1. Introduction1.1 NanoelectronicsNanoelectronics indicates the application of nanotechnology in electronic modules. In simple terms, this can be defined as defining an electron at the nanoscale. A thin film is a layer of material whose thickness varies from nanometers to several micrometers. Thin films are more important than thick films due to their interface and surface effects. Semiconductor devices and optical coatings are the main areas benefiting from thin film construction. Several other applications of thin film materials are photoconductors, solar cells, dye-sensitized solar cells, selective solar coatings, large area array fabrication, narrow band filters, thin film batteries, polarizers , sensors, photothermal solar coatings, photoconductors, IR detectors, satellites. temperature control, anti-reflective coatings, interference elements, waveguide coatings, etc. Metal oxide thin films have greater importance in nanoelectronics due to their extraordinary chemical sensing properties. The preparation of a chemical sensing element is classified into two categories. One is a physical method and the other is a chemical method. In the physical method, the substrate is held stationary and the film material has been moved from a target material to the substrate either in the form of vapor or by an impact process with some form of external energy. Vacuum evaporation falls into this category. While chemical film manufacturing involves the chemical reaction of precursors occurring either on the surface of the substrate or near it. The chemical method is further classified into vapor phase and liquid phase technique. The chemical vapor deposition technique falls under the vapor phase technique and electrodeposition, chemical bath deposition...... middle of paper ......e an automated system on a scale of laboratory using a stepper motor and an NI USB 6212 data acquisition (DAQ) card in the LabVIEW platform.1.4 Automated SILAR system: ADD LABVIEW AND STEPPER MOTOR CONTENT HERE1.5 Metal oxide sensor - Biomarker : The electrical conductivity of the metal oxide sensor varies depending on the amount of gas/vapour surrounding them. Depending on its sensing nature, a sensor may be able to effectively detect a particular gas/vapor. This property can be used in medical diagnosis to serve as an electronic nose. If the sensor is able to detect the biologically significant gas present in the patient's exhaled breath, then it can be used as a biomarker to detect diseases non-invasively. The doctor has been informed by email if the detected values ​​turn out to be abnormal. ADD SMTP CONTENT HERE