Project funded by the National Science Centre (NCN) under the “OPUS-21” call
Project No.: 2021/41/B/ST5/04328
Project value: 2,258,420.00 PLN,
including PORT: 1,550,620.00 PLN
Funding value: 2,258,420.00 PLN,
including PORT: 1,550,620.00 PLN
Project implementation period: 29/04/2022 – 29/04/2025
Project leader: Dr. hab. Alicja Bachmatiuk
Project implemented in consortium with:
- Łukasiewicz Research Network – PORT Polish Center for Technology Development
- Wrocław University of Science and Technology
The scientific objective of this research project is to conduct systematic studies of piezoelectricity in ultrathin transition-metal compounds with defined oxygen and chalcogen content. Piezoelectricity in transition metal dichalcogenides (TMDCs) is receiving increasing attention due to their unique atomic-scale structure and high surface-to-thickness ratio. The piezoelectric effect—and thus piezoelectric materials—has applications in sensors, as well as in systems for energy generation and conversion.
Theoretical and experimental studies have estimated piezoelectric coefficients of approximately 0.2–1 pm·V⁻¹ for graphene and hBN, and 2–10 pm·V⁻¹ for most TMDCs. Another interesting category of 2D materials is Janus monolayers, which may exhibit stronger piezoelectricity than their conventional TMDC counterparts.
We hypothesize that a transition exists between piezoelectricity in MoX₂ and apparent piezoelectricity in MO₂, and that this state depends on the composition of the mixed M(XₓO₁₋ₓ)₂ layer. Within the project, we aim to synthesize MO₂-type materials with defined chalcogen content using CVD and subsequently examine their piezoelectric response. Additionally, we will develop fabrication methods for Janus-type MSO materials with controlled composition and establish strategies for material doping.
