点击次数：

发表刊物：ADVANCED SCIENCE

关键字：contact-free manipulationdynamic levitationferrofluidsubwavelengthultrasound

摘要：Acoustic levitation provides a means to achieve contactless manipulation of fragile materials and biological samples. Most acoustic levitators rely on complex electronic hardware and software to shape the acoustic field and realize their dynamic operation. Here, the authors introduce a dynamic acoustic levitator that is based on mechanically controlling the opening and (partial) closing of subwavelength apertures. This simple approach relies on the use of a single ultrasonic transducer and is shown to permit the facile and reliable manipulation of a variety targets ranging from solid particles, to fluid and ferrofluidic drops. Experimental observations agree well with numerical simulations of the Gor'kov potential. Remarkably, this system even enables the generation of time-varying potentials and induces oscillatory and rotational motion in the levitated objects via a feedback mechanism between the trapped object and the trapping potential. This is shown to result in long distance tran

论文类型：期刊论文

论文编号：2100888

学科门类：工学

文献类型：J

卷号：第8卷

期号：第5期

页面范围：SCI一区Top期刊,影响因子17.521

ISSN号：10.1002/advs.202100888

是否译文：否

发表时间：2021-06-01

收录刊物：SCIE

合写作者：Fischer Peer,Wallaschek Joerg,Tingting Yu,Zhichao Ma,Twiefel Jens