South Korea R & D biomimetic nano gap sensor has a breakthrough significance
The spider is an arthropod that is extremely flexible in limb activity. When you try to roll up a magazine and slap the "terrifying monster" on the table, the spider can detect your behavior for the first time and run away early. Spider's eight legs on the joint position has a magical "sensory organs", and the internal nervous system is directly linked. The movement of objects in the external environment, even humans and their minor tricks, can trigger the "sixth sense alarm" in spiders through vibration. Using the principle of acoustic vibrations, Korean scientists developed a nano-gap sensor derived from the "true spider" bionic. Not long ago, "Nature" magazine published this groundbreaking bionics research report, I believe it will bring future prosperity to solve human problems. The whole system is unique in that the gap between the sensors reaches a nanometer level, which guarantees high sensing sensitivity. Specifically, researchers added a platinum layer of 20 nanometers to the viscoelastic polymer surface to create a sensor frame. By stretching the surface of the platinum variant, voids are created between the upper and lower layers, exposing the underlying polymer and allowing researchers to measure the conductance of the sensor's surface. In actual experiments, especially for the audio test, the performance of the nano-crack sensor is superior to the traditional microphone. In an experimental environment with up to 92 decibels of noise, the sensor captures exactly the words "go" "jump", "shoot" and "stop" the testers say, but even the standard microphones can not even record the sound clearly . Researchers conducted more in-depth testing. When the sensor is placed on the violin's surface, it can accurately record each note in the song and "translate" it to an external device for output as electronic music. What is even more interesting is that the sensor is worn at the wrist and it can accurately measure the human heartbeat. Peter Fratzl, a professor at the Planck Institute in Germany, published an academic paper on electromechanical transducer systems in Nature in 2009. Daeshik Kang, the head of the Korean team, was inspired by the paper to launch a research project on nanosensors. Professor Fratzl said that if the research was somewhat obscure, it could be explained by an example of the "tile effect" of the image: comparing a nanosensor to a neatly arranged tile that adheres firmly to the underlying rubber. When using the external force to stretch the area of ​​the bottom rubber to 101%, the area of ​​the tile will not change, but the gap between the tiles will inevitably become larger. The key is that each tile covers the bottom of the rubber, the expansion of the area should be greater than 1%. The example in the tile is equivalent to the nano-sensor, bone movement is equivalent to the operation of the tensile rubber. Professor Mansoo Choi, aerospace engineering major at Seoul National University, who participated in the study, said: "The opening and closing of the gap will be magnified during the measurement. As a result, the nano-crack sensor offers superb sensitivity in detecting resistivity. " In a follow-up study, the team hoped to find a more appropriate material to replace the expensive platinum in the current version of the nano-crack conductor to make the technology universally available. Professor Choi said, "The focus of future research will be on improving the durability and durability of the system, and we hope that in 3-5 years, the product can be put into commercial production." The concept of using the sound of the air to vibrate and thus identify the movement is actually very subtle. In addition to being able to effectively exclude outside noise, nano-sensors also need to be able to accurately identify the specific frequency band sound. For example, the medical blood pressure and pulse functions mentioned in the previous section need to make the sensor particularly sensitive to a certain body signal rather than simply recording sound and vibration. So Xiaobian think, function is not much, but rather refined. But still very much looking forward, in the future to see a "Spider-Man sixth sense" sensor. Heat Exchanger Cleaning Agent/Metal Decreasing Agent
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