在水中通过半周期性断裂的聚合物核心外微珠激发无线电波的超声波生成
Salvatore Buonocore1, Aliaksandr Hubarevich2, Francesco De Angelis3
1Istituto Italiano Di Tecnologia, Via Morego 30, 16163, Genova, Italy. salvatore.buonocore@iit.it.
Scientific reports
|March 13, 2024
概括
研究人员在核心外微珠中发现了一种新的动态,它会产生压力振荡. 这一发现可能会导致在Mega-Hertz范围内进行射电声学成像的先进微传感器.
科学领域:
- 物理 物理学 物理
- 材料科学 材料科学 材料科学
- 声学 声学 在声学上
背景情况:
- 具有核心外结构的聚合物微珠对各种应用有兴趣.
- 了解微型系统中的动态行为对于开发新技术至关重要.
研究的目的:
- 为了研究核心外聚合物微珠中的随机共振双可变动力学.
- 探索这些微珠的潜力作为微传感器用于射电声学成像.
主要方法:
- 进行了理论和数值研究.
- 一个亚微米的核心外微珠系统被激发使用脉冲Mega-Hertz激光器.
- 嵌入在外中的碳纳米管产生热量,与声学振荡相互作用.
主要成果:
- 观察到一个随机共振的双稳定系统,由激光诱导的热量和声学振荡驱动.
- 该系统表现出快速穿过的扭曲,导致两个状态之间的过渡,并产生压力振荡.
- 发现了显著的周期性和能量转换效率.
结论:
- 这项研究表明,在核心外微珠中产生压力振荡的新机制.
- 这一现象为开发用于射电声学成像的新型Mega-Hertz范围核心微传感器铺平了道路.
- 这些发现为微观规模的能量转换和热力学过程提供了洞察力.
更多相关视频
06:02Multi-timescale Microscopy Methods for the Characterization of Fluorescently-labeled Microbubbles for Ultrasound-Triggered Drug Release
Published on: June 12, 2021
3.9K
06:51Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
7.0K
相关概念视频
01:17Ultrasonography
4.5K
Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...
During an ultrasonography procedure, a handheld device called...
4.5K
01:28Standing Waves in a Cavity
919
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
919