Abstract
A brief introduction into fundamentals of one new RTD project is given. Basic principles of chemical sensors based on the novel property of nanocrystalline silicon - bright room temperature photoluminescence - for detection of diacetyl in beer are presented.
The measurements are performed by analysis of head-space mixture that is in equilibrium with liquid beer sample. The gas mixture is not analyzed by means of separation of gas components followed by their subsequent detection but through an interaction of all gas phase components with an array of sensor elements and a measurement of the photoluminescence sensor response.
Sensor elements have different response to compounds in the gas mixture due to introduction of various chemical recognition selectors into the detection process via chemical modification of silicon nanocrystals surface with suitable chemical compounds. More detailed description and technical details will be published later.