Liquid metal nano-robot successfully developed
January 10, 2019 Source: Health News Author: clothing Hillsborough
Window._bd_share_config={ "common":{ "bdSnsKey":{ },"bdText":"","bdMini":"2","bdMiniList":false,"bdPic":"","bdStyle":" 0","bdSize":"16"},"share":{ }};with(document)0[(getElementsByTagName('head')[0]||body).appendChild(createElement('script')) .src='http://bdimg.share.baidu.com/static/api/js/share.js?v=89860593.js?cdnversion='+~(-new Date()/36e5)];In the sci-fi movie "Terminator 2", there has been a powerful robot "T-1000" made of liquid metal, which can be quickly restored regardless of the physical damage, and even free from the external environment. Change the shape. The liquid metal swimming nano-robot, which was successfully developed by the team of Professor Guo Bin of the Micro-Nano Technology Research Center of Harbin Institute of Technology, is, to a certain extent, turning these dreams into reality. The research paper has been published in the journal American Chemical Society Nano. Industry experts believe that this new nano-robot is expected to show its talents in the fields of wearable devices, biomedicine, and clinical precision therapy.
According to reports, the melting point of metal gallium is 29.8 degrees Celsius, the alloy is liquid at room temperature, and the liquid metal gallium and its alloys have high boiling point, low viscosity and good thermal conductivity, electrical conductivity, fluidity and biocompatibility. . Scientists have explored this and tried to apply liquid metal gallium and its alloys to robotics, biomedicine, wearable devices, etc. However, there have been no reports on the development of mobile nano-based robots based on liquid metal.
For the first time, Guo Bin's team used liquid metal gallium as raw material, and took the lead in the international application of nanoporous template plastic forming technology to obtain a rod-shaped liquid metal gallium nano robot with asymmetric structure. The nano-robot is highly controllable in length and diameter, with a minimum diameter of up to 200 nanometers. The research team observed that the rod-shaped liquid metal nano-robot has a core-shell structure with a metal gallium core and a gallium oxide layer. Due to the pre-melting effect of the metal gallium at the nanometer size, the core can remain in a liquid state even at normal temperature, and the gallium oxide layer of the outer shell can maintain its rod-like structure. The study also found that liquid metal nano-robots have stable full-wavelength fluorescence and can be used as fluorescent probes for precise disease diagnosis and treatment. The liquid metal nano-robot can perform self-propelled motion similar to bacterial swimming in the fluid under the action of external ultrasonic field, and the speed can reach 23 micrometers per second. It can also actively lock the cancer cells and gradually dissolve the shell after entering the cancer cells. The wonderful phenomenon of kernel deformation, fusion and complete degradation under acidic conditions.
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