Ultrathin perovskites as nanoresonators: a platform for sustainable low-energy quantum sensors

Research question

Nanomechanical resonators are miniature structures with exceptional sensitivity to mass, force, and
environmental changes, making them highly useful for both classical and quantum sensing.
This project develops these structures using ultrathin perovskite nanosheets with high sensitivity and quantum-relevant properties such as low mass and high quality factors. We aim to create on-chip devices compatible with existing nanofabrication. These resonators will enable advanced sensing of forces and environmental changes. The work also lays the foundation for incorporating functionalities such as piezoelectricity and magnetism in future devices.

Sustainability aspects
The project enables more sustainable sensor technologies by drastically reducing material use through nanoscale devices. Microwave-assisted synthesis lowers energy consumption and production time compared to conventional methods. Perovskite materials offer lead-free and less hazardous alternatives to current technologies. In infrared sensors,
perovskites may replace Hg, Te, Ge, and Ga-based materials, while applying intrinsically piezoelectric
(Na1-xKx)NbO3 nanosheets excludes the necessity of using lead-containing external piezoelectric
components in future devices. Thereby, we primarily address the UN Sustainable Development Goal (SDG)
12 of responsible consumption and production, while additionally contributing to SDG 3, SDG 6, SDG 8,
and SDG 9 through the reduction of hazardous substances and critical raw materials in sensor technologies.