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SUMMARY:MEchanics GAthering -MEGA- Seminar: 3D printed ultrasonically actu
 ated soft microactuators
DTSTART:20221006T161500
DTEND:20221006T173000
DTSTAMP:20260921T101718Z
UID:f86862b72af1d7bace928e87ea22058ba18659ddba485e317e905882
CATEGORIES:Conferences - Seminars
DESCRIPTION:Amit Dolev (MICROBS\, EPFL)\nAbstract:\nAcoustics can be harne
 ssed to apply forces and manipulate objects at the microscale. 3D nanoprin
 ting using two-photon polymerization enables the development of a plethora
  of soft microactuators and machines powered by ultrasound. The various ac
 oustic forces stem from nonlinear phenomena\, and their characterization i
 s crucial for the design of efficient and functional devices. The nonlinea
 r phenomena occur simultaneously in intense ultrasonic fields\, and by car
 eful design\, selected forces dominate. Here\, we focus on microscale air 
 bubbles (microbubbles) that are trapped inside microfabricated cavities fo
 r the application of anisotropic forces where only parts of the bubbles os
 cillate. Microbubbles are known to be efficient resonators when excited cl
 ose to their resonance frequencies\, but for acoustics\, it may be advanta
 geous to excite them at their natural frequencies where the velocity and n
 ot displacement are maximal. Oscillating microbubbles are subjected to pri
 mary radiation forces\, secondary radiation due to neighboring bubbles\, a
 nd thrust generated by acoustic streaming. We will demonstrate how to leve
 rage the latter forces to design acoustically controlled soft microactuato
 rs and discuss the limitations and difficulties.\n\nBio:\nAmit joined the 
 MicroBioRobotic Systems Laboratory headed by Prof. Sakar as a postdoctoral
  associate in January 2020. He received his B.Sc. in Mechanical Engineerin
 g at Technion – Israel Institute of Technology and Ph.D. in the Dynamics
  & Mechatronics Laboratory headed by Pro. Bucher at Technion during a dire
 ct doctoral track. During his Ph.D. Amit focused on nonlinear dynamics\, n
 amely parametric resonators\, and standing wave acoustic levitation. Curre
 ntly\, he works on the utilization of acoustics for powering and controlli
 ng  microscale technologies.\n 
LOCATION:MED 2 2423 https://plan.epfl.ch/?room==MED%202%202423 https://epf
 l.zoom.us/j/65022317743?pwd=alFuM0NVUUdxWWpRT0ZxeDUxa0lmUT09
STATUS:CONFIRMED
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