By controlling the target position, the ejected droplets can be carefully deposited and patterned anywhere.
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Acoustophoretic printing enables droplet formation of any material, generating the tiniest possible single drop of honey in a tiny honey jar. By controlling the target position, the ejected droplets can be carefully deposited and patterned anywhere.
In this example, honey drops are patterned on a glass substrate. Thanks to gravity, any liquid can drip — from water coming out of a faucet to the century-long pitch drop experiment. With gravity alone, droplet size remains large and drop rate difficult to control.
Pitch, which has a viscosity roughly billion times that of water, forms a single drop per decade. To enhance drop formation, the research team relies on generating sound waves. These pressure waves typically have been used to defy gravity, as in the case of acoustic levitation.
Now, the researchers are using them to assist gravity, dubbing the new technique acoustophoretic printing. This controllable force pulls each droplet off of the nozzle when it reaches a specific size and ejects it toward the printing target.
The higher the amplitude of the soundwaves, the smaller the droplet size, irrespective of the viscosity of the fluid. To eject droplets, acoustophoretic printing utilizes airborne ultrasounds — virtually material independent. Even liquid metal can be easily printed! The researchers tested the process on a wide range of materials, from honey to stem-cell inks, biopolymers, optical resins, and even liquid metals.
The application space is limitless. The Harvard Office of Technology Development has protected the intellectual property relating to this project and is exploring commercialization opportunities. Skip to content Printing with sound Movement monitor.
Check out Model profiles at H&m, job listings & salaries. Review & learn skills to be a Model. Welcome to H&M. Select your region to enter our site. Aug 31, · H Casual Selling H amp;M Selling Dress amp;M The research is published in Science Advances. Liquid droplets are used in many applications, from printing ink on paper to creating microcapsules for drug delivery.