CORDIS Project
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This project explores the generation of ultra-high-speed micro-jets from vapor bubbles created by laser pulses in a liquid-filled micro-capillary. These micro-jets, reaching supersonic speeds, have potential applications in needle-free drug and vaccine delivery for humans and animals.
When focusing a laser pulse in a liquid, a vapor bubble can instantaneously (< 1μs) be produced.We have generated such vapor bubbles in a liquid-filled coated micro-capillary (diameter≈ 50μm).
Remarkably, in about one microsecond after vapor bubble formation, an ultra-high-speed, ultra-sharp, focused liquid micro-jet emerged out of the meniscus at the end of the micro-capillary.Even with laser pulse energies comparable to those used in laser-pointers, we have reached spectacular supersonic veloc…
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