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Tongji University: A major breakthrough in single diamond!
2024-04-30 16:36:34
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Recently, Professor Han Lu's team from the School of Chemical Science and Engineering of Tongji University made a major breakthrough in the field of photonic crystals and successfully realized the self-assembly construction of a single diamond (SD) curved titanium dioxide skeleton. This achievement is known as the "Holy Grail" of photonic crystal structures. . Relevant research papers have been published in the internationally authoritative academic journal "Proceedings of the National Academy o
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Recently, Professor Han Lu's team from the School of Chemical Science and Engineering of Tongji University made a major breakthrough in the field of photonic crystals and successfully realized the self-assembly construction of a single diamond (SD) curved titanium dioxide skeleton. This achievement is known as the "Holy Grail" of photonic crystal structures. . Relevant research papers have been published in the internationally authoritative academic journal "Proceedings of the National Academy of Sciences" (PNAS).
▲ Schematic diagram of SD skeleton synthesis strategy
The research team conducted a detailed characterization of the SD skeleton structure through a series of experimental methods. The results of small-angle X-ray scattering and wide-angle X-ray diffraction showed the high degree of order of the sample; observations with scanning electron microscopy and transmission electron microscopy further confirmed the existence and high degree of order of the SD structure; the electrostatic potential density distribution obtained by three-dimensional reconstruction of electron crystallography This proves the four-connection configuration of the SD structure. In addition, calculation results show that the structure has a complete photonic band gap, providing a theoretical basis for its application in photonic crystals and other fields.
▲ Structural characterization of SD skeleton structure before and after roasting
▲ Transmission electron microscopy analysis and three-dimensional structure analysis of SD skeleton
▲ Photonic band gap diagram of SD skeleton structure
Professor Han Lu said that this research result not only solved the problem of synthesizing non-equilibrium structures that has long been pursued in the field of self-assembly, but also provided new ideas and methods for the preparation of other thermodynamic non-equilibrium structures. This method has broad application prospects and important significance in the fields of self-assembly, bionic materials, and next-generation optical devices.Professor Han Lu said that this research result not only solved the problem of synthesizing non-equilibrium structures that has long been pursued in the field of self-assembly, but also provided new ideas and methods for the preparation of other thermodynamic non-equilibrium structures. This method has broad application prospects and important significance in the fields of self-assembly, bionic materials, and next-generation optical devices.
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