Journal:ADVANCED SCIENCE
Key Words:contact-free manipulationdynamic levitationferrofluidsubwavelengthultrasound
Abstract: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
Indexed by:Journal paper
Document Code:2100888
Discipline:Engineering
Document Type:J
Volume:第8卷
Issue:第5期
Page Number:SCI一区Top期刊,影响因子17.521
ISSN No.:10.1002/advs.202100888
Translation or Not:no
Date of Publication:2021-06-01
Included Journals:SCIE
Co-author:Fischer Peer,Wallaschek Joerg,Tingting Yu,Zhichao Ma,Twiefel Jens
Date of Publication:2021-06-01