Hong Kong City Granddaughter Doctor Develops New Bionic Materials
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Chen Xuemei is introducing new biomimetic materials.
The surface structure of the new material under the electron microscope.
A female doctoral student from the Mainland, City University of Hong Kong, Chen Xuemei, recently developed a new type of biomimetic material that can significantly enhance the heat dissipation performance of materials. The volume of electronic products will therefore be further reduced. The technology can be widely used in electronic products containing chips, such as computers and mobile phones, as well as electrical appliances containing heat pipes such as air conditioners and refrigerators, as well as water collection systems in arid regions.
Electronic chips are small and fast, but the heat generated is also increasing. Therefore, effective heat dissipation in a limited space has always been a concern in the electronics manufacturing industry.
After completing her bachelor's and master's degree in philosophy at the University of Jinan, Chen Xuemei went to the City University of Hong Kong to pursue his doctoral degree. Now he is a second-year doctoral student in the School of Mechanical and Biomedical Engineering. Under the guidance of Dr. Wang Dingkai, Assistant Professor of the Department, and Dr. Yao Shuhuai, Assistant Professor of Mechanical Engineering, Hong Kong University of Science and Technology, she processed the micron pyramid on the surface of the silicon material, and then skillfully covered a layer of nanometers between the upper part of the pyramid and the gap. Grasses make the surface of the material superhydrophobic, and the bottom of the pyramid is relatively favorable for droplet formation and growth. After the water vapor generated by the heat touches the surface of the material and condenses into water droplets, it adheres to the hydrophilic smooth surface and builds up, and then quickly slides away from the surface of the hydrophobic nanograss to take the heat away. , to achieve rapid and effective cooling effect.
This modified silicon surface structure can improve material heat dissipation performance by one to two times, greatly reducing the energy consumed by heat dissipation, and further reducing the volume of electronic products.
Chen Xuemei said that the design was inspired by observations of nature, such as muddy lotus leaves and beetles in the desert. The difference between the two is that their surface has a layer of micro-nanostructures that exhibit superhydrophobic properties; however, in terms of heat transfer properties, the materials developed far exceed those of nature.
Chen Xuemei published the above research papers as the first author and was recently published by Advanced Functional Materials, a leading academic journal of the material sciences. He was selected as the cover story. (Reporter Liu Qiuwei)
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