2022
DOI: 10.1002/adfm.202203109
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Generating Multistructured Ultrasound via Bioinspired Metaskin Patterning for Low‐Threshold and Contactless Control of Living Organisms

Abstract: Metasurfaces of the subwavelength thicknesses provide a distinctive route for acoustic wave manipulation. Based on the advanced 3D printing, those judiciously designed 2D metamaterials enable intriguing effects such as abnormal reflection, transmission, and absorption. However, acoustic metasurfaces, with strong wave–structure interactions in subwavelength scales, have encountered a big challenge of being acoustically transparent due to the insufficient impedance mismatch underwater. Here, reconfigurable bioin… Show more

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Cited by 11 publications
(5 citation statements)
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“…However, due to the existence of stable Cassie-Baxter states (viz., micro-sized air cavities) on the nanosurface of BC meta-skins, we hereby focus on the acoustic properties of patterned BC meta-skins. The non-infiltrative fibrous structure hosts a large volume of air inside, not only allowing the meta-skin to exhibit small elastic modulus and density but also leading to a huge acoustic impedance contrast with water, physically equivalent to an ‘soft boundary’ 22 , 23 . In this case, the paper-cutting BC meta-skin of deep-subwavelength thickness (viz., a patterned soft boundary) can be regarded as a new class of acoustic metasurfaces that can provide a sophisticated and full modulation of transmission acoustic field 22 , 24 28 .…”
Section: Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…However, due to the existence of stable Cassie-Baxter states (viz., micro-sized air cavities) on the nanosurface of BC meta-skins, we hereby focus on the acoustic properties of patterned BC meta-skins. The non-infiltrative fibrous structure hosts a large volume of air inside, not only allowing the meta-skin to exhibit small elastic modulus and density but also leading to a huge acoustic impedance contrast with water, physically equivalent to an ‘soft boundary’ 22 , 23 . In this case, the paper-cutting BC meta-skin of deep-subwavelength thickness (viz., a patterned soft boundary) can be regarded as a new class of acoustic metasurfaces that can provide a sophisticated and full modulation of transmission acoustic field 22 , 24 28 .…”
Section: Introductionmentioning
confidence: 99%
“…The non-infiltrative fibrous structure hosts a large volume of air inside, not only allowing the meta-skin to exhibit small elastic modulus and density but also leading to a huge acoustic impedance contrast with water, physically equivalent to an ‘soft boundary’ 22 , 23 . In this case, the paper-cutting BC meta-skin of deep-subwavelength thickness (viz., a patterned soft boundary) can be regarded as a new class of acoustic metasurfaces that can provide a sophisticated and full modulation of transmission acoustic field 22 , 24 28 . The ultrasound modulation in ~10 μm precision enables a wide spectrum of applications, such as high-quality acoustic holography 29 , 3D ultrasonic tweezing 30 , 31 , and perfect focusing 32 , 33 , being especially significant in controlling the high-frequency (>5 MHz) ultrasound field’s profile 34 , 35 .…”
Section: Introductionmentioning
confidence: 99%
“…In the past decade, acoustic metamaterials (AMMs) have greatly expanded the parameter space of acoustic materials, thereby yielding diverse functionalities, [3][4][5] such as extreme refraction and refractive index, [6][7][8][9] extraordinary transmission, 10 perfect absorption, 11 super-resolution focusing, 12 complex field manipulation, [13][14][15] and other functionalities. [16][17][18][19] Moreover, considerable effort has been made for the design of planar focusing lenses; 20,21 however, these works are largely demonstrated in the wavefront manipulation field.…”
Section: Introductionmentioning
confidence: 99%
“…However, due to the existence of stable Cassie-Baxter states (viz., micro-sized air cavities) on the nanosurface of BC meta-skins, we hereby move our attentions on the acoustic properties of BC meta-skin kirigami. The non-infiltrative fibrous structure hosts a large volume of air inside, not only allowing the meta-skin to exhibit small elastic modulus and density, but also leading to a huge acoustic impedance contrast with liquid water, physically equivalent to an ideal 'soft boundary' 22,23 . In this case, BC meta-skin kirigami can be regarded as a new class of acoustic metasurface (viz., a patterned soft boundary) that offers a sophisticated and full modulation of transmission field through a deep-subwavelength thickness 22,[24][25][26][27][28] .…”
mentioning
confidence: 99%
“…The non-infiltrative fibrous structure hosts a large volume of air inside, not only allowing the meta-skin to exhibit small elastic modulus and density, but also leading to a huge acoustic impedance contrast with liquid water, physically equivalent to an ideal 'soft boundary' 22,23 . In this case, BC meta-skin kirigami can be regarded as a new class of acoustic metasurface (viz., a patterned soft boundary) that offers a sophisticated and full modulation of transmission field through a deep-subwavelength thickness 22,[24][25][26][27][28] . The wavefront modulation in ~10 μm precision enables a wide spectrum of applications, such as the high-quality acoustic holography 29 , ultrasonic tweezing 30,31 , and perfect focusing 32,33 , especially significant in high-frequency (>5 MHz) ultrasound controls 34,35 .…”
mentioning
confidence: 99%