Generation of an enhanced acoustical quasi-Bessel beams with a grating Bessel interdigital transducer

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-09-29 DOI:10.1016/j.apacoust.2025.111089

Kaining Wen , Jiaojiao Liu , Tengfei Zheng , Yupei Qiao , Guangbin Zhang , Xiaofeng Zhang

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引用次数: 0

Abstract

The manipulation of micrometer-scale particles using surface acoustic waves has been demonstrated to have broad application potential across a range of disciplines, including materials science, precision engineering, the biomedical fields and chemical analysis. The device offers a number of advantages, including non-contact operation, good biocompatibility, the elimination of the need for chemical biomarkers, and straightforward integration. However, due to the structure of interdigital transducers, the performance in complex microfluidic environments remains constrained by limitations in energy efficiency and field uniformity. In this paper, a grating-Bessel interdigital transducer (GBIDT) is presented to produce modulating quasi-Bessel beam, which can enhance acoustic energy distribution in the manipulation region. Numerical simulations and experimental validation have been conducted to verify the preservation of the non-diffracting and self-healing properties of quasi-Bessel beams within the manipulation region by the proposed GBIDT. The results show that the integrated grating structure can enhance the main lobe intensity while suppressing side lobes (59.38% improvement in main-to-side lobe ratio), enabling a 29.41% acceleration in particle transport velocity under equivalent energy input. Then, the GBIDT is used in crystallization experiment and the results show that the device can produce pyramid-shaped NaCl crystals with controlled morphology, which distincts from naturally formed cubic crystals. This work demonstrates a practical approach to enhancing SAW-based manipulation systems, with potential applications in microfluidics, bioseparation, and programmable crystal engineering.

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用光栅贝塞尔数字间换能器产生增强声学准贝塞尔光束

利用表面声波操纵微米级粒子已被证明在包括材料科学、精密工程、生物医学领域和化学分析在内的一系列学科中具有广泛的应用潜力。该设备具有许多优点，包括非接触操作，良好的生物相容性，消除了对化学生物标志物的需求，以及直接集成。然而，由于数字间换能器的结构，其在复杂微流体环境中的性能仍然受到能量效率和场均匀性的限制。本文提出了一种光栅-贝塞尔数字间换能器（GBIDT），用于产生调制准贝塞尔光束，从而改善操纵区域的声能分布。通过数值模拟和实验验证，验证了所提出的GBIDT在操纵区内保持准贝塞尔光束的非衍射和自愈特性。结果表明，集成光栅结构可以增强主瓣强度，同时抑制副瓣（主瓣与副瓣比提高59.38%），在等效能量输入下，粒子输运速度可提高29.41%。然后，将GBIDT用于结晶实验，结果表明，该装置可以形成不同于自然形成的立方晶体的锥形NaCl晶体，其形貌可控。这项工作展示了一种实用的方法来增强基于saw的操作系统，在微流体、生物分离和可编程晶体工程中具有潜在的应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.