Have you view Chladni figure ? They ’re patterns made when sand is disclose to sound waves on metal plates . They can be amazingly intricate . And now scientists could be making them with living cells .
Put a grain of Amandine Aurore Lucie Dupin on a frantically vibrate plate and it will skip off . Put it on a still plate and it will stay where it ’s put . Due to the miracle of sound , the vibrating plate and the still denture can be the same . Sound waves , in good order combined , vibrate frantically at antinodes , but are still at nodes . By pull off the king and relative frequency of the quivering , the guest and antinodes can change their location and their pattern . Scatter backbone on plates and you may see a miscellany of different radiation diagram .
scientist have realized that this does n’t have to be confined to a metal photographic plate . Place cells in a substrate and vibrate that substratum with levelheaded Wave , and those sound wave can crowd cellular phone around . That ’s what newfangled “ acoustic pair of tweezers ” do . research worker can carefully station four “ acoustical sources ” around a substrate in a container , and tune their power and frequency to make exactly placed nodes and antinode . Just like the sand , cell will naturally slide to the non - vibrating parts of the substrate .
There are various grade of wafture - based tweezers . Many researchers use optical tweezers , which utilize lasers . But lasers come with heat and energy , which can damage thin jail cell . acoustical tweezers are comparably soft , but can still move cells into complex pattern or hold them still to be learn .
twist and Cell Image : Tony Jun Huang , Penn State
[ ViaAcoustic tweezers pull strings cell - to - jail cell contact ]
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