Video Experimental Relacionado

Updated: Jan 15, 2026

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

Hacia materiales hipersónicos ambientalmente sensibles

Edson R Cardozo de Oliveira¹, Gastón Grosman², Chushuang Xiang¹

¹Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS), Centre de Nanosciences et de Nanotechnologies (C2N), 10 Boulevard Thomas Gobert, 91120 Palaiseau, France.

|January 13, 2026

Resumen

Los investigadores desarrollaron un novedoso resonador nanoacústico utilizando películas de sílice mesoporosa. Este dispositivo es sensible a la humedad, lo que permite un confinamiento hipersónico sintonizable para aplicaciones de fonónica adaptable y detección.

Área de la Ciencia:

Ciencia de Materiales; Nanotecnología; Acústica

Sus antecedentes:

Los fonones acústicos de gigahertz (GHz) son cruciales para tecnologías avanzadas como el procesamiento de datos y la computación cuántica.; Los resonadores nanfónicos convencionales luchan con la adaptabilidad ambiental.

Objetivo del estudio:

Introducir un novedoso resonador nanoacústico de cavidad abierta.; Demostrar la sensibilidad ambiental, específicamente a la humedad, para el confinamiento hipersónico sintonizable.

Principales métodos:

Fabricación de películas delgadas de SiO2 mesoporoso (MTF) para el resonador.; Utilización de mediciones de reflectividad transitoria para analizar los cambios en la frecuencia de resonancia.; Comparación sistemática de dispositivos con diferentes tamaños de poros y grosores de película.

Principales resultados:

El resonador nanoacústico exhibe cambios significativos en la frecuencia de resonancia en respuesta a cambios en la humedad relativa.; Las resonancias están dictadas principalmente por el grosor de la película y las propiedades del material, no por la geometría de los poros.; El tamaño de los poros influye en la dinámica de sintonización a través de la acción capilar.

Conclusiones:

El resonador mesoporoso desarrollado ofrece una plataforma versátil para integrar la mecánica a nanoescala con factores ambientales.; Este diseño proporciona una vía simple para crear dispositivos hipersónicos ambientalmente sensibles.; Las aplicaciones potenciales incluyen sistemas avanzados de detección y nanfónicos adaptables.

Palabras clave:

fonones acústicos coherentes materiales mesoporosos nanofónica

Más Videos Relacionados

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Fabricating Degradable Thermoresponsive Hydrogels on Multiple Length Scales via Reactive Extrusion, Microfluidics, Self-assembly, and Electrospinning

Published on: April 16, 2018

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

Assessment of Audio-Tactile Sensory Substitution Training in Participants with Profound Deafness Using the Event-Related Potential Technique

Published on: September 7, 2022

Videos de Conceptos Relacionados

Sound as Pressure Waves

Sound as Pressure Waves

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
The pressure fluctuation depends on the difference in displacements between the successive points in the...

Sound Waves: Resonance

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...

Perception of Sound Waves

Perception of Sound Waves

The human ear is not equally sensitive to all frequencies in the audible range. It may perceive sound waves with the same pressure but different frequencies as having different loudness. Moreover, the perception of sound waves depends on the health of an individual's ears, which decays with age. The health of one's ears may also be affected by regular exposure to loud noises.
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same...

Sound Intensity

Sound Intensity

The loudness of a sound source is related to how energetically the source is vibrating, consequently making the molecules of the propagation medium vibrate. To measure the loudness of a source, the physical quantity of interest is the intensity. This is defined as the energy emitted per unit of time per unit of area perpendicular to the sound wave's propagation direction. Since the total energy is greater if the source vibrates for a longer duration and over a larger area, dividing the...

Sound Intensity Level

Sound Intensity Level

Humans perceive sound by hearing. The human ear helps sound waves reach the brain, which then interprets the waves and creates the perception of hearing. The loudness of the environment in which a person is located determines whether they can distinguish between different sound sources.
The human ear can perceive an extensive range of sound intensity, necessitating the use of the logarithmic scale to define a physical quantity—the intensity level. It is a ratio of two intensities and...

Sound Waves

Sound Waves

Sound waves can be thought of as fluctuations in the pressure of a medium through which they propagate. Since the pressure also makes the medium's particles vibrate along its direction of motion, the waves can be modeled as the displacement of the medium's particles from their mean position.
Sound waves are longitudinal in most fluids because fluids cannot sustain any lateral pressure. In solids, however, shear forces help in propagating the disturbance in the lateral direction as well....