Information summary: Science and Technology Weekly: University of Science and Technology of China constructs the first international entanglement based metro quantum network
There is a new strategy for quantum dot light-emitting devices to increase their lifetime by more than 100 times. Liao Liangsheng and Wang Yakun from the Research Institute of Functional Nanometer and Soft Matter of Suzhou University proposed a new controllable preparation method of long-range ordered quantum dot films, and realized the effective unification of high brightness, high efficiency and high stability in the perovskite quantum dot system for the first time, providing a new strategy for the practical application of high-performance quantum dot light-emitting devices. The perovskite quantum dot light-emitting device based on this strategy can maintain an external quantum efficiency of more than 20% under the working condition of 1000 nits brightness, and its working life is relatively improved by more than 100 times, which is the highest value of similar devices. Relevant research results were published in the journal Nature.
The University of Science and Technology of China has built the first entanglement based metro quantum network in the world. Academician Pan Jianwei of University of Science and Technology of China, Bao Xiaohui, Zhang Qiang and others first used single photon interference to establish entanglement between independent storage nodes, and based on this, they built the world's first urban three node quantum network based on entanglement. This work has improved the distance of the real quantum entanglement network from tens of meters to tens of kilometers by three orders of magnitude, laying a scientific and technical foundation for the subsequent development of quantum network applications such as blind quantum computing, distributed quantum computing, and quantum enhanced long baseline interference. Relevant research results were published in the journal Nature.
The new microneedle patch may inhibit tumor recurrence and metastasis after surgery. Wang Chaohui, College of Biomedical Engineering, Hainan University, researched and designed an implantable microneedle patch, which can continuously act on postoperative residual tumors, and convert it into an in situ tumor vaccine to activate specific anti-tumor immune response, thus inhibiting tumor recurrence and metastasis. This "ready to use" microneedle patch is loaded with semiconductor nanocrystals that can respond to the chemical signals of the tumor microenvironment. The microneedle patch can continuously induce tumor cells to die of immunogenicity through in situ nano enzyme catalytic effect, so that immune cells can effectively recognize, kill and remember tumor cells. Timely treatment of residual tumor after operation is of great significance for improving the survival rate of patients after operation. Relevant research results were published in the journal Advanced Healthcare Materials.
Changchun Institute of Optics and Mechanics and others have made important progress in the field of high-dimensional optical field detection. Li Wei's team and collaborators from the Changchun Institute of Optics, Precision Mechanics and Physics, Chinese Academy of Sciences, for the first time in the world, used a single device to comprehensively characterize high-dimensional optical fields with arbitrarily varying polarization and intensity within the broadband spectrum through a single measurement, and realized the detection of high-dimensional optical field information. This research proposes an innovative idea of using the spatial dispersion and frequency dispersion characteristics of the optical interface to regulate the polarization and spectral response in the wave vector space, which can map all the information of the high-dimensional light field to the single imaging result. Relevant research results were published in the journal Nature.
The new strategy can improve the conversion efficiency of lead-free perovskite solar cells. Hu Qin, the research group of the School of Microelectronics, University of Science and Technology of China, successfully constructed perovskite homojunction to promote the separation and extraction of photogenerated carriers, aiming at the problems of non lead tin based perovskite semiconductors such as serious self doping, high defect density, and large non radiative recombination loss. This proves the potential application of homogeneous structure building strategy in the field of tin based perovskite solar cells, and also provides a new idea for the structure optimization of other perovskite optoelectronic devices. This study reveals the microscopic mechanism of homogeneous structure construction, and also provides a reliable scheme for the structural design and energy level regulation of tin based perovskite semiconductor optoelectronic devices. Relevant research results were published in the journal NanoLetters.
Risk tip: the development process of cutting-edge science and technology is not as expected in terms of regulatory boundaries, evolution path, commercial landing, external environment, etc.
