Photoinduced ultrasonic transmitter and manufacturing method thereof

A technology of photoinduced ultrasound and manufacturing method, which is applied in the field of ultrasound, can solve problems such as dispersion of ultrasound directions, random and disordered conduction of heat, disorderly mixing of light-absorbing materials and thermoelastic materials, etc., achieve high light absorption coefficient, and improve photoacoustic conversion efficiency Effect

Pending Publication Date: 2022-06-21
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in most photo-ultrasonic emitting devices, light-absorbing materials and thermoelastic materials are mixed randomly, resulting in random and disordered conduction of heat, resulting in dispersion of ultrasonic directions and reduced intensity.

Method used

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  • Photoinduced ultrasonic transmitter and manufacturing method thereof
  • Photoinduced ultrasonic transmitter and manufacturing method thereof
  • Photoinduced ultrasonic transmitter and manufacturing method thereof

Examples

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Effect test

Embodiment 1

[0027] A structure and a preparation method of a photo-induced ultrasonic transmitter. The device is small in size and simple in structure. The ultrasonic sound pressure generated by the device is high, the frequency is high, the frequency bandwidth is wide and the divergence angle is small. The device is divided into a light absorbing part and a thermal expansion part.

[0028] The composition and production process of the light absorbing part

[0029] like Figure 1a Shown is the light-absorbing part of the device, that is, the metal nanoparticle-porous alumina array 5, which includes the metal thin film 1. The porous alumina array adopts the symmetrical double-pass AAO nanometer model DP450-300S-50000 produced by Shenzhen Topology Fine Membrane. Template 2 and metal nanoparticles 3.

[0030] The preparation steps are as follows: an aluminum film is grown on the surface of the porous anodic aluminum oxide by physical vapor deposition, and aluminum nanoparticles are deposite...

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Abstract

The invention discloses a light-induced ultrasonic transmitter and a manufacturing method thereof, and the light-induced ultrasonic transmitter comprises a metal nanoparticle-porous alumina array composite layer, polydimethylsiloxane for absorbing incident light and converting the incident light into heat, and a thermal expansion material, which is filled in nanopores of an alumina array and is used for absorbing heat energy. Ultrasonic waves are emitted through the thermoelastic effect. The substrate is a glass substrate, and the device generates an ultrasonic signal under the action of pulse laser by utilizing a light-induced ultrasonic principle. The method disclosed by the invention is simple in process, and the generated ultrasound has the characteristics of high intensity, high frequency and wide frequency band.

Description

technical field [0001] The invention relates to the field of ultrasonic technology, in particular to a photo-induced ultrasonic transmitter and a manufacturing method thereof. Background technique [0002] Ultrasound transmitters have a wide range of applications in ultrasound diagnostics and medical imaging. The traditional ultrasonic sound source is a piezoelectric ultrasonic transducer, which has the disadvantages of large volume, low frequency, high driving voltage, susceptibility to electromagnetic interference and large volume of the sound wave focusing point. With the continuous development of science and technology, researchers have proposed the concept of photo-induced ultrasound. The ultrasound generated by it has the characteristics of high intensity, high frequency and frequency bandwidth, and itself is free from electromagnetic interference and has the advantages of miniaturization. The ultrasonic transmitter prepared by utilizing the photo-induced ultrasonic e...

Claims

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Application Information

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IPC IPC(8): A61B8/00C23C14/18C23C14/35
CPCA61B8/4483C23C14/185C23C14/35
Inventor 胡二涛林一波韦玮余柯涵王静王博永丁建永
Owner NANJING UNIV OF POSTS & TELECOMM
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