Agenda
Highly Sensitive Room-temperature NH₃ and NO2 Sensors Based on 2D materials
- Monday, 13 July 2026
- 11:00-11:45
- LB01.010 (Snijderzaal)
Université Gustave Eiffel
Highly Sensitive Room-temperature NH₃ and NO2 Sensors Based on 2D materials
Two-dimensional (2D) nanomaterials such as graphene, transition metal dichalcogenides (TMDs) and MXenes have attracted significant interest in sensing applications due to their large surface area, outstanding electrical properties, and abundance of active sites (1-2). This work reports the design and fabrication of a high-performance NH3 and NO2 sensors based on 2D materials. Graphene and TMDs nanosheets were synthesized via liquid-phase shear exfoliation (LPSE), while Ti₃C₂Tx-MXene was obtained by selectively etching the Al layers from a Ti₃AlC₂ MAX-phase precursor using the minimally intensive layer delamination (MILD) method. Ultrathin 2D films with a thickness of approximately 10 nm were successfully fabricated using a scalable self-assembly method. The morphology and structure of the synthesized 2D materials and their films were characterized using a combination of complementary techniques. Altogether, the results highlight the uniform and continuous deposition of 2D nanosheet films on glass substrates. Chemiresistive NH3 and NO2 sensors based on 2D materials were fabricated and systematically evaluated under varying gas concentrations at room temperature. The 2D films exhibit superior sensing performance at room temperature. Moreover, the sensors demonstrate a high degree of stability and excellent reproducibility, making them promising candidates for practical applications such as environmental monitoring.
Biography:
Dr Fatima BOUANIS, studied the synthesis of nanomaterials (carbon nanotubes and 2D materials) for development of new generation of selective gas sensors for urban environmental applications. Her research focuses on i) the synthesis of nanomaterials using both Chemical Vapor deposition (CVD) and liquid phase exfoliation (LPE), ii) the non-covalent functionnalization of nanomaterials with organometallic complexes and iii) the development of electronic devices and the evaluation of their performances under differents environments.
