Publications de Daniel Moreno Garcia

Measuring direct flexoelectricity at the nanoscale

Luis Guillermo Villanueva Torrijo, Daniel Moreno Garcia

Flexoelectricity is a property of all dielectric materials, where inhomogeneous strain induces electrical polarization. This effect becomes particularly prominent at the nanoscale where larger strain gradients can be obtained. While flexoelectric charges h ...

Institute of Electrical and Electronics Engineers2025

Flexoelectric Transduction in Hafnium-based NEMS

Daniel Moreno Garcia

Flexoelectricity, the coupling between electric polarization and strain gradient, is a universal phenomenon in dielectric materials. When a material bends, electric charges are generated, and inversely, applying an electric voltage induces bending. This bi ...

EPFL2025

In-Sensor Passive Speech Classification with Phononic Metamaterials

Luis Guillermo Villanueva Torrijo, Daniel Moreno Garcia

Mitigating the energy requirements of artificial intelligence requires novel physical substrates for computation. Phononic metamaterials have vanishingly low power dissipation and hence are a prime candidate for green, always-on computers. However, their u ...

Wiley-V C H Verlag Gmbh2024

Effect of annealing on flexoelectricity in hafnium oxide (HfO2)

Luis Guillermo Villanueva Torrijo, Daniel Moreno Garcia

Flexoelectricity is universal in all dielectrics, effective at high temperatures, and a promising transduction technique for nanoelectromechanical systems (NEMS). However, as flexoelectricity is still in its early stages, many aspects require further inves ...

AIP American Institute of Physics2024

Flexoelectricity in amorphous hafnium oxide (HfO2)

Luis Guillermo Villanueva Torrijo, Kaitlin Marie Howell, Daniel Moreno Garcia

Flexoelectricity, inherent in all materials, offers a promising alternative to piezoelectricity for nanoscale actuation and sensing. However, its widespread application faces significant challenges: differentiating flexoelectric effects from those of piezo ...

2024

Photostrictive Actuators Based on Freestanding Ferroelectric Membranes

Luis Guillermo Villanueva Torrijo, Daniel Moreno Garcia

Complex oxides offer a wide range of functional properties, and recent advances in the fabrication of freestanding membranes of these oxides are adding new mechanical degrees of freedom to this already rich functional ecosystem. Here, photoactuation is dem ...

Wiley-V C H Verlag Gmbh2024

Resonant Transducers Consisting of Graphene Ribbons with Attached Proof Masses for NEMS Sensors

Luis Guillermo Villanueva Torrijo, Daniel Moreno Garcia

The unique mechanical and electrical properties of graphene make it an exciting material for nanoelectromechanical systems (NEMS). NEMS resonators with graphene springs facilitate studies of graphene's fundamental material characteristics and thus enable i ...

Amer Chemical Soc2023

A Resonant Graphene NEMS Vibrometer

Luis Guillermo Villanueva Torrijo, Daniel Moreno Garcia

Measuring vibrations is essential to ensuring building structural safety and machine stability. Predictive maintenance is a central internet of things (IoT) application within the new industrial revolution, where sustainability and performance increase ove ...

WILEY-V C H VERLAG GMBH2022

Proof Of Concept Of A Graphene-Based Resonant Accelerometer

Luis Guillermo Villanueva Torrijo, Daniel Moreno Garcia

Acceleration measurements are fundamental in applications such as consumer electronics, navigation, automotive safety and Internet of things (IoT). In comparison with capacitive or piezoresistive MEMS accelerometers, resonant graphene accelerometers have t ...

IEEE2021