Abstract
Single-beam acoustic tweezers (SBAT), used in laboratory-on-a-chip (LOC) device has promising implications for an individual micro-particle contactless manipulation. In this study, a freestanding hydrothermal PZT thick film with excellent piezoelectric property (d33 = 270pC/N and kt = 0.51) was employed for SBAT applications and a press-focusing technology was introduced. The obtained SBAT, acting at an operational frequency of 50MHz, a low f-number (∼0.9), demonstrated the capability to trap and manipulate a micro-particle sized 10μm in the distilled water. These results suggest that such a device has great potential as a manipulator for a wide range of biomedical and chemical science applications.
Highlights
Single-beam acoustic tweezers (SBAT), used in laboratory-on-a-chip (LOC) device has promising implications for an individual micro-particle contactless manipulation
Micro-particle manipulation by single beam acoustic tweezers based on hydrothermal PZT thick film
The weak piezoelectric response of ZnO (d33 ≈ 10–26 pm/V, kt ≈ 0.28)[16] presents a major obstacle, limiting the trapping force. This film sputtering technology is just right for ultra-high frequency (>100MHz) SBAT, and it doesn’t work for the SBAT with a relatively lower operational frequency, for example 50MHz∼100MHz
Summary
Single-beam acoustic tweezers (SBAT), used in laboratory-on-a-chip (LOC) device has promising implications for an individual micro-particle contactless manipulation. Micro-particle manipulation by single beam acoustic tweezers based on hydrothermal PZT thick film
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