Test Chamber for Nano Gas Sensor Development

Project Description

The objectives of this project are to design and build a test chamber for nano gas sensor characterization. Nano gas sensors have a lot of applications in firefighting, biomedical, chemical, drug and food industries. The objectives are to develop a highly sensitive and selective nano gas sensor and determine its sensitivity to specific gases like alcohol vapor to further improve its performance. The principle of the alcohol vapor sensing is that the sensor reacts with the vapor at a certain temperature, and as a result, the resistance of the sensor will be changed. By measuring the resistance change, we can determine the sensitivity of the sensor. For the testing purpose, we need a testing system similar to what is shown in the figure below. However, your design does not have to be exactly like that. The diameter of the chamber can be 30cm, and the height can be about 50cm. It should be airtight and the desired amount of gas or vapor can be injected into the chamber from outside through a syringe. The temperature of the sensor mounting plate (SUBSTRATE in the figure) should be controllable with the temperature ranged from room temperature to about 350 °C. The bottom heater for alcohol evaporation can be set from room temperature to 100°C. Nano sensors and the resistance measurement equipment will be provided for the sensitivity measurement test.