Conductive composites of engineered nanomaterials with excellent gas sensing properties

Thesis event information

Date and time of the thesis defence

Place of the thesis defence

L10, Linnanmaa

Topic of the dissertation

Conductive composites of engineered nanomaterials with excellent gas sensing properties

Doctoral candidate

Master of engineering Jin Zhou

Faculty and unit

University of Oulu Graduate School, Faculty of Information Technology and Electrical Engineering, Microelectronics Research Unit

Subject of study

Electrical Engineering

Opponent

Professor Knut Irgum, University of Umeå

Custos

Professor Krisztian Kordas, University of Oulu

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Novel Sensing Materials Offer Highly Selective and Sensitive Detection of Hazardous Gases

Novel Sensing Materials Offer Highly Selective and Sensitive Detection of Hazardous Gases
Gas sensors are essential devices for ensuring safety and process control in a wide range of industries as well as for monitoring health/medical and environmental conditions. While numerous commercial gas sensors exist on the market, their typical limitations include the use of rare metals and high operating temperatures. In his thesis, doctoral candidate Jin Zhou at the University of Oulu, together with his collaborators, has developed new types of gas sensor materials that overcome these drawbacks. By using engineered composites of conductive nanomaterials (carbon nanotubes and titanium carbides) and conjugated polymers (polysquaraines and polycroconaine) highly selective and sensitive detection of hazardous gases such as Hydrogen Sulfide and/or Ammonia is enabled at ultra-low, part-per-billion concentrations, even at room temperature. The breakthrough is achieved by designing and modeling the chemical structure of the materials along with experimental optimization of their compositions. The developed new gas sensing materials offer promising environmentally benign and economically beneficial alternatives to currently applied semiconducting metal oxides. Moreover, they and can contribute to the seamless expansion of the global efforts towards the digitalization of environment, health/medicine and process industries.

Last updated: 23.1.2024