Folding a focalized acoustical vortex on a flat holographic transducer: Miniaturized selective acoustical tweezers
Folding a focalized acoustical vortex on a flat holographic transducer: Miniaturized selective acoustical tweezers
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DOI：
10.1126/sciadv.aav1967
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发表时间：
2019-04-01
期刊：
影响因子：
13.6
通讯作者：
Thomas, Jean-Louis
中科院分区：
文献类型：
--
作者：
Baudoin, Michael;Gerbedoen, Jean-Claude;Thomas, Jean-Louis
基于聚焦声学涡流的声学镊子有望以前所未有的组合选择性和捕获力，对毫米级到亚微米级的颗粒、微生物和细胞进行精确的非接触式操纵。然而，当前系统在性能和/或小型化和可集成性方面的严重限制阻碍了该技术的广泛传播。在这里，我们通过开发第一个扁平、紧凑、成对的单电极聚焦声学镊子来释放聚焦声学涡流的潜力。这些镊子依赖于通过将球形声涡旋折叠在平坦压电基板上而获得的螺旋换能器。我们展示了这些镊子在标准微流体环境中以独特的选择性抓取和移位微米物体的能力。该系统的简单性及其对更高频率的可扩展性为微生物学、微型机器人和显微镜学开辟了巨大的前景。
Acoustical tweezers based on focalized acoustical vortices hold the promise of precise contactless manipulation of millimeter down to submicrometer particles, microorganisms, and cells with unprecedented combined selectivity and trapping force. Yet, the widespread dissemination of this technology has been hindered by severe limitations of current systems in terms of performance and/or miniaturization and integrability. Here, we unleash the potential of focalized acoustical vortices by developing the first flat, compact, paired single electrode focalized acoustical tweezers. These tweezers rely on spiraling transducers obtained by folding a spherical acoustical vortex on a flat piezoelectric substrate. We demonstrate the ability of these tweezers to grab and displace micrometric objects in a standard microfluidic environment with unique selectivity. The simplicity of this system and its scalability to higher frequencies open tremendous perspectives in microbiology, microrobotics, and microscopy.