Publications by authors named "Ruben H Guis"
Article Synopsis
- Suspended piezoelectric thin films are crucial for high-frequency filtering in telecommunications, needing reduced thickness for higher resonance frequencies.
- The research combines the robust mechanical and electrical properties of graphene electrodes with the strong piezoelectric effects of BaTiO (BTO) to create ultrathin resonators.
- The findings show that these devices can achieve mechanical resonance and reconfigure by switching ferroelectric states through a DC bias, vibrating at an impressive frequency of 233 GHz.
Although 2D materials hold great potential for next-generation pressure sensors, recent studies revealed that gases permeate along the membrane-surface interface, necessitating additional sealing procedures. In this work, we demonstrate the use of free-standing complex oxides as self-sealing membranes that allow the reference cavity beneath to be sealed by a simple anneal. To test the hermeticity, we study the gas permeation time constants in nanomechanical resonators made from SrRuO and SrTiO membranes suspended over SiO/Si cavities which show an improvement up to 4 orders of magnitude in the permeation time constant after annealing the devices.
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