Single-Beam Acoustic Tweezer Prepared by Lead-Free KNN-Based Textured Ceramics

Micromachines

Matthew Xinhu Ren¹  Tomoaki Karaki²  Jinyan Zhao³  Gang Niu³  Jian Zhuang³  Kun Zheng³  Wei Ren³  Zhe Wang³  Lingyan Wang³  Nan Zhang³  Zhishui Jiang⁴  Li Wen⁴  Yi Quan⁵  Chunlong Fei⁵  Tianlong Zhao⁵  Chenxi Zheng⁵  Xinhao Sun⁵  Zhaoxi Li⁵ 

[1] Biology Program, Faculty of Science, The University of British Columbia, Vancouver, BC V6T 1Z4, Canada;Department of Intelligent Systems Design Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Imizu 939-0398, Toyama, Japan;Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education & International Center for Dielectric Research, School of Electronic Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China;Guangdong JC Technological Innovation Electronics Co., Ltd., Zhaoqing 526000, China;School of Microelectronics, Xidian University, Xi’an 710071, China;

关键词: acoustic tweezer;    non-contact manipulation;    ultrasound;    lead-free;    piezoelectric;    textured ceramics;   

DOI  :  10.3390/mi13020175

来源: DOAJ

【 摘 要 】

Acoustic tweezers for microparticle non-contact manipulation have attracted attention in the biomedical engineering field. The key components of acoustic tweezers are piezoelectric materials, which convert electrical energy to mechanical energy. The most widely used piezoelectric materials are lead-based materials. Because of the requirement of environmental protection, lead-free piezoelectric materials have been widely researched in past years. In our previous work, textured lead-free (K, Na)NbO₃ (KNN)-based piezoelectric ceramics with high piezoelectric performance were prepared. In addition, the acoustic impedance of the KNN-based ceramics is lower than that of lead-based materials. The low acoustic impedance could improve the transmission efficiency of the mechanical energy between acoustic tweezers and water. In this work, acoustic tweezers were prepared to fill the gap between lead-free piezoelectric materials research and applications. The tweezers achieved 13 MHz center frequency and 89% −6 dB bandwidth. The −6 dB lateral and axial resolution of the tweezers were 195 μm and 114 μm, respectively. Furthermore, the map of acoustic pressure measurement and acoustic radiation calculation for the tweezers supported the trapping behavior for 100 μm diameter polystyrene microspheres. Moreover, the trapping and manipulation of the microspheres was achieved. These results suggest that the KNN-based acoustic tweezers have a great potential for further applications.

【 授权许可】

Unknown