Abstract
An ultrasonic device for micro-patterning and precision manipulation of micrometre-scale particles is demonstrated. The device is formed using eight piezoelectric transducers shaped into an octagonal cavity. By exciting combinations of transducers simultaneously, with a controlled phase delay between them, different acoustic landscapes can be created, patterning micro-particles into lines, squares, and more complex shapes. When operated with all eight transducers the device can, with appropriate phase control, manipulate the two dimensional acoustic pressure gradient; it thus has the ability to position and translate a single tweezing zone to different locations on a surface in a precise and programmable manner.
| Original language | English |
|---|---|
| Article number | 164101 |
| Journal | Applied Physics Letters |
| Volume | 102 |
| Issue number | 16 |
| DOIs | |
| Publication status | Published - 22 Apr 2013 |
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