Chemistry Seminar: Biosensors, Chemical Sensors, and Gas sensors in the Applications of Healthcare and Agriculture


1:00 PM - 2:00 PM




Sensors have played a significant role in our routine life, such as glucose sensors, pH sensors, explosive detection, carbon monoxide monitors, etc. Accurate glucose monitoring has been the aim of researchers for the benefits of diabetes patients to manage the blood glucose level better. The acidity and basicity of a liquid phase often play a significant role in chemical preparation and reaction and biological sample preservation. The ability to monitor the local pH variation may also pave the way for early cancerous cell detections in a liquid environment. The toxic and explosive materials bring vapor into the gaseous phase and may lead to the surrounding crowds' dangerous condition. Therefore, developing sensitive, selective, and repeatable sensing elements is necessary to tackle various problems in our daily lives.
Dr Dong’s research covered metal oxides-based nanomaterials synthesis and sintering, electrode modification, electrochemical characterization for the as-prepared bulk, and screen-printed electrodes for glucose measurements and pH sensing. The metal oxides formed from Group 9 elements of the periodic table have shown dual sensitivity towards glucose and pH monitoring. For the gas sensor-related project, a patterned interdigitated gold electrode device modified with a thin layer of metal oxide ceramic nanofibers was applied for ammonia measurements in the range of 10-100 ppm. The detection limit for the proposed sensor was 3.22 ppm. Afterward, the proton-transfer-reaction mass spectrometry applied in an international competition project to distinguish the gender of the fertile chicken eggs will be presented as well. In the last, Qiuchen will briefly introduce his future work and plan.

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