The experiment of sunward flower

A team of researchers from the University of California and Arizona State University found a way to create a material that exhibits tropical behavior. In their paper published in the journal Nature Nanotechnology, the team described their material and how effective it was when tested. Ma Mingming of the University of Science and Technology of China published a news and opinion article in the same journal outlining the team’s work. googletag.cmd.push(function() {googletag.display(‘div-gpt-ad-1449240174198-2′); });
Many people have noticed that even when the sun is moving across the sky during the day, some flowers can keep their faces pointing towards the sun-this is an example of phototropism. Sunflowers are probably the most famous example. Scientists have developed a similar technique, but it involves crazy behavior-what they prefer is the ability to create a synthetic material that can follow the light source by simply bending it towards the light source in real time. In this new effort, the researchers claim to have achieved this goal. They created a polymer material that can bend toward the light source without other influencing factors.
Researchers create polymers by combining light-responsive nanomaterials with thermally responsive materials. The first absorbs light and converts it into heat, while the second shrinks when heated. The researchers molded their polymer into the shape of a flower stem, and then emitted a beam of light at it from different angles. They report that the stem is bent directly at the light source. This is because light is absorbed at a given angle at a given position on the stem and converted into heat. The heat forces the material on one side of the light to shrink, causing the rod to bend toward the light beam. This situation continues until the stem is bent to the point where its top and length partially obstruct the beam-at that time, the stem is fixed in place. Then, the team placed a “flower” on the tip of the stem, filling it in the shape of the flower. In their case, the flower is a small solar panel. The researchers said that their device can be used to keep solar cells pointed at the sun, thereby increasing efficiency.
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Post time: Nov-09-2021


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