Retrieving the Mach Newsletter
A new printing technique developed at Harvard Engineering School uses sound waves to control and radiate droplets from a nozzle with incredible force, making researchers print thicker and more viscous can be more than ever.
Honey, stem cell-based inks and liquid metals, all of which have been fluidly printed using these vibrations derived from acoustic techniques that researchers had previously used to float fluids, not to print with them.
The new technique was described in an article published today (August 31
As Live Science has already reported, sound waves apply pressure to the objects they impinge on. Researchers have long experimented with adjusting the pressure to push, pull, float or even create tractor beams. (You can try it at home.) In the new study, the researchers used the same pressure to precisely control the ink in a printer, greatly expanding the range of liquids that could be printed. [6 Weird Facts About Gravity]
"Our goal was to lose sight of the viscosity [the thickness of the liquid] by developing a printing system that is independent of the material properties of the liquid," says Daniele Foresti, a researcher in materials science and mechanical engineering at Harvard University School of Engineering and Applied Sciences, said in a statement.
Under normal circumstances, printers rely on gravity to make ink droplets and deposit them, according to the study. This is effective to some extent, but it limits the materials that a printer can use; a printer that drops droplets of fast flowing ink would not do a good job with much slower dripping sound.
The scientists said that sonic pressure experiments have used sonic waves to form droplets in the past, but offer only limited control
For the new method to work, the researchers tuned sound waves that collect droplets from a nozzle and only then would fire after the drops had grown to the correct size. And the burning is intense: the researchers wrote that their system accelerates droplets with more than 100 times of gravitational acceleration at sea level (near 1,000 meters per square second) – or about 3.5 times the sun's surface gravity of 274 meters per second in the Square.
"The idea is to create an acoustic field that literally detaches tiny droplets from the nozzle, much like picking apples from a tree," Foresti says.
No matter how thick or thin the liquid is, as soon as it reaches the right place Englisch: bio-pro.de/en/region/stern/magazine/…2/index.html strive for precise control over materials such as stem cells, when they should first benefit from their new printing method, but that they assume they are in. html all kinds of industries working with viscous materials
Originally published on Live Science.
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