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与光学机械传感器相连的静止滴的超声波谱学

K G Scheuer¹, F B Romero², G J Hornig²

¹Ultracoustics Technologies Ltd., Sherwood Park, AB, T8A 3H5, Canada.

|November 8, 2023

概括

这项研究介绍了一种新的光机械传感器系统,用于分析微小液滴的声学特性. 该技术准确地测量滴滴声模式,显示了小型生物和化学样本精确感测的潜力.

科学领域:

声学感应声学感应声学感应
微流体学微流体学
视觉机械学视觉机械学

背景情况:

描述小液体体积的声学特性是一项挑战.
现有的方法对亚纳米升样本缺乏灵敏度.

研究的目的:

开发一种系统,用于询问亚纳米升液体样本的声学特性.
为了证明这种技术用于监测滴水蒸发的应用.

主要方法:

使用带有集成光机械传感器的开放微流体平台.
在传感器上沉积静止滴,用于被动声谱传感.
在传感器的噪音频谱内分析热驱动的声学呼吸模式.

主要成果:

证明了对环境中介噪声有限的敏感性.
观察到滴滴声学呼吸模式与传感器模式混合.
在实验数据和0-40 MHz的理论预测之间取得了很好的一致性.

结论:

开发的光机械系统能够精确地对小液体体积进行声学传感.
该技术在分析生物和化学样本方面具有潜在的应用.
监控滴水蒸发是一个关键的应用例子.

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相关概念视频

UV–Vis Spectrometers

UV–Vis Spectrometers

The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.