Development of Inkjet-Printed Nanocomposite Films for Microwave Gas Sensor Application

Inkjet printing technology can provide the development of films diversity through the combination of ink modulation and process conditions. In addition, digitally control the coating films at the desired position to provide easy fabrication, fast, low cost and environment friendly, with today's demand for processes. The project uses inkjet printing technology to develop a nanocomposite film (PEDOT:PSS-CNT) with gas sensing characteristics. The sensing characteristics of nanocomposite films will be optimized by using inkjet printing technology. Differential microwave resonators and voltage-controlled oscillators are loaded with sensing layer to provide the real-time gas sensing. This technology combines the fabrication of nanocomposite films and the design of microwave circuits to achieve real-time detection which provide a highly competitive choice for the Internet of Things technology. In the following is our proposed plan for three years:1. Development of inkjet-printed nanocomposite film: Process parameters such as naoncomposite ink (PEDOT: PSS-CNT) modulation, drop spacing, multipasses, and annealing temperature are optimized by gas sensing based on electrical and physical properties.2. Design and implementation of inkjet-printed differential microwave gas sensing resonator: coplanar waveguide and microstrip transmission lines loaded nanocomposite film are developed circuit equivalent model. A differential microwave split ring resonator with nanocomposite film are designed and implemented based on circuit model for gas test to obtain multi-dimensional quantities and accurate characteristics.3. Design and Implementation inkjet-printed microwave gas sensing oscillator: the split ring resonator is used as the resonant cavity to design and implement a single-ended voltage-controlled oscillator. After sensing the gas, the frequency and output power of the resonant cavity can be determined by the voltage-controlled oscillator after gas sensing to provide real-time changes which can integrate with the Internet of Things.

Project ID:PB10907-2954
External Project ID:MOST109-2221-E182-027