| 利用体声波微流阱阵列捕获微米级颗粒 |
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| 引用本文： | 王生庚,易夕圆,王振宇,杨增涛.利用体声波微流阱阵列捕获微米级颗粒[J].声学学报,2021,46(3):440-446. |
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| 作者姓名： | 王生庚 易夕圆 王振宇 杨增涛 |
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| 作者单位： | 1. 重庆医科大学 生物医学工程学院超声医学工程国家重点实验室 重庆 400016; |
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| 基金项目： | 重庆市自然科学基金项目(cstc2019jcyj-msxmX0098)资助 |
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| 摘 要： | 提出了一种利用体声波微流阱在三维流体空间中捕获微米级颗粒的方法,制备了2种体声波微流阱阵列,并采用有限元法进行仿真计算,求解方程得到一阶声场、二阶声场,仿真分析了聚苯乙烯微粒在流场中的运动情况。实验结果显示体声波微流阱能够快速、高效捕获三维流体空间中的微米级颗粒,实验结果与仿真结果吻合良好,圆柱型体声波微流阱与圆孔型体声波微流阱都能在几十秒内捕获三维空间中的微粒,且圆柱型体声波微流阱的捕获效率比圆孔型体声波微流阱高。该方法突破了声表面波微流阱无法操控三维空间中的微粒的局限,提高了捕获微粒的效率。
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| 关 键 词： | 体声波 声流 声操控 微流阱阵列 |
| 收稿时间： | 2020-10-09 |
Bulk acoustic wave microstreaming trap array for capturing micron particle |
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| Affiliation: | 1. State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical. Engineering, Chongqing Medical University, Chongqing 400016;2. Chongqing Key Laboratory of Biomedical Engineering, Chongqing 400016 |
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| Abstract: | The paper proposes a method to capture micron-sized particles in a three-dimensional fluid space by using bulk acoustic wave microstreaming traps.Two types of bulk acoustic wave microstreaming trap arrays were prepared,and the finite element method was used for simulation calculations.The first-order and second-order acoustic fields are obtained by solving the equations.The movement of polystyrene particles in the flow field was simulated and analyzed.The experimental results show that the bulk acoustic wave microstreaming traps can quickly and efficiently capture micron-sized particles in the three-dimensional fluid space.The experimental results are in good agreement with simulation results.Both cylindrical and circular hole bulk acoustic wave microstreaming traps can capture particles in three-dimensional space in tens of seconds.Moreover,the capturing efficiency of the cylindrical bulk acoustic wave microstreaming traps is higher than that of circular hole bulk acoustic wave microstreaming traps.This method breaks the limitation that the surface acoustic wave microstreaming traps cannot manipulation the particles in the threedimensional space,and improves the efficiency of capturing the particles. |
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