Video Experimental Relacionado
Updated: May 8, 2026
10:49
Planar and Three-Dimensional Printing of Conductive Inks
Published on: December 9, 2011
37.1K
Las tintas de sonido auto realzadas permiten una impresión acústica volumétrica de penetración profunda
Xiao Kuang1, Qiangzhou Rong2, Saud Belal2
1Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA.
Science (New York, N.Y.)
|December 7, 2023
Resumen
La impresión volumétrica acústica de penetración profunda (DAVP) utiliza ultrasonido para permitir una impresión 3D más rápida y más grande con diversos materiales, incluso a través de tejidos biológicos para aplicaciones médicas.
Área de la Ciencia:
- Fabricación aditiva
- Ingeniería biomédica
- Ciencias de los materiales
Sus antecedentes:
- La impresión volumétrica ofrece ventajas de velocidad y calidad sobre los métodos tradicionales.
- Las técnicas actuales están limitadas por la energía de la luz, las tintas transparentes y los tamaños de construcción pequeños.
Objetivo del estudio:
- Introducir una nueva técnica de impresión acústica volumétrica de penetración profunda (DAVP).
- Superar las limitaciones de la impresión volumétrica basada en la luz.
- Permitir la impresión con diversos materiales y a mayores profundidades.
Principales métodos:
- Desarrolló una tinta sonorizada de auto-mejoramiento (sono-tinta).
- Se utilizó ultrasonido enfocado para la polimerización.
- Realizó experimentos y modelos acústicos para optimizar los parámetros de impresión.
Principales resultados:
- Se ha logrado un bajo flujo acústico y una rápida polimerización sonotérmica.
- Impresión demostrada de hidrogeles volumétricos y nanocompuestos independientemente de sus propiedades ópticas.
- Habilitado la impresión a centímetros de profundidad a través de los tejidos biológicos.
Conclusiones:
- DAVP amplía las opciones de materiales y tamaños de construcción en la impresión volumétrica.
- La técnica muestra potencial para crear estructuras 3D complejas.
- DAVP allana el camino para aplicaciones médicas mínimamente invasivas.
Videos de Conceptos Relacionados
01:01Perception 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 frequency...
The pitch of a sound depends on the frequency and the pressure amplitude of the source. Two sounds of the same frequency...
00:58Sound 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 emitted...
01:14Sound 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...
01:17Sound 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...
The pressure fluctuation depends on the difference in displacements between the successive points in the...
01:05Intensity and Pressure of Sound Waves
The intensity of sound waves can be related to displacement and pressure amplitudes by using their wave expressions and the definition of intensity. The critical step to achieve this is to write the power delivered by the particles on the wave as the product of force and velocity and simplify the force per unit area as the pressure. The velocity of the medium's particles can be derived from the displacement.
Unlike the time average of a sinusoidal term, which is zero since it is positive and...
Unlike the time average of a sinusoidal term, which is zero since it is positive and...
01:21Perceiving Loudness, Pitch, and Location
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by identifying...