The University Of Hong Kong Has Successfully Prepared Various Unique Forms Of Diamond Particles

Associate Professor Chu Zhiqin's team and Professor Lin Yuan's team from the University of Hong Kong have proposed a new nano carving technology that utilizes air oxidation to achieve large-scale morphology and nanostructure reshaping of diamond particles, successfully preparing various unique forms of diamond particles. This technology significantly enhances the application potential of diamond materials in multiple fields such as optics, quantum technology, and information technology.

 

Diamond is not only widely known in the jewelry industry, but also has broad application prospects in various fields such as electronics, optics, thermodynamics, and biomedical due to its unique material properties, such as high hardness, high thermal conductivity, wide bandgap, and biocompatibility. At the micro and nano scales, the geometric shape and structure of diamond particles directly affect their performance and application effectiveness. However, due to the chemical inertness and extremely high hardness of diamond, as well as the limitations of existing synthesis, preparation, and processing technologies, the preparation of diamond nanoparticles and microparticles with precise morphology and structure has always faced many challenges. Therefore, how to flexibly control the morphology and surface structure of diamond particles has become an important issue that materials scientists urgently need to solve.

 

To address this issue, the teams of Associate Professor Chu Zhiqin and Professor Lin Yuan from the University of Hong Kong have proposed an innovative technology in their latest research: "Programmable Nanocarving". Considering that diamond particles have different crystal planes and internal crystal defects, and these structures exhibit varying degrees of reactivity, researchers believe that air oxidation, as a simple and direct method, can achieve large-scale diamond particle shape engineering by selectively oxidizing specific crystal structures. This method accurately selects initial diamond particles (including seeds, crystal planes, and defects), combines Monte Carlo simulation to predict specific structures, and processes them under appropriate oxidation conditions (such as temperature, time, and oxygen concentration) to ultimately achieve the desired reshaping of diamond particles. The research team has successfully prepared various unique microstructures of diamond particles, including spherical, twisted surface, conical, inverted conical, nanoflower, and porous shapes. Through extensive experimental verification and Monte Carlo simulation, a shape library has been established to guide the design, manufacturing, and practical application development of diamond particles.

Unlike traditional physical or chemical processing methods, this nano carving technology enables researchers to accurately reshape the morphology, surface, and internal structure of diamond particles at the nanoscale, effectively changing the electrical, optical, and other properties of diamond particles, opening up broad prospects for diamond materials in new application fields. For example, in the field of optics, reshaped diamond particles can be used as efficient optical devices, fully utilizing their excellent optical properties to enhance the performance and efficiency of optical devices; In anti-counterfeiting technology, unique shaped diamond particles can be used to manufacture difficult to replicate anti-counterfeiting labels, thereby enhancing the security and anti-counterfeiting capabilities of products. The application prospects of these new diamond particles make this technology of great innovative significance in nanomaterials and multi field applications.

 

The research team believes that the success of this nano carving technology not only provides a new perspective for the application of diamond materials, but also opens up new ideas and methods for the precise design and application of other nano materials. At the same time, it will also provide important references for the development of related industries. With the further development of this technology, it is expected to play an increasingly important role in the fields of nanotechnology, quantum technology, and high-performance materials.