The 2021 Government Work Report proposes to insist on innovation-driven development, insist on the core position of innovation in the overall modernization of our country, and take scientific and technological self-reliance as a strategic support for national development. For colleges and universities, they must assume the mission of serving high-level technological self-reliance, closely link their own construction with national strategic goals and strategic tasks, give full play to their own advantages, and make contributions to achieving high-level technological self-reliance. In the past three months, many research teams from Guilin University of Technology have made significant research progress in different fields. Let us witness the scientific research strength of the school together today!
magnesium alloy superhydrophobic surface-anti-corrosion research field
magnesium alloy is considered to be one of the most promising engineering materials due to its unique properties. However, the high corrosion rate , which is difficult to control for magnesium alloys, limits its application.
In response to this problem, Associate Professor Wen Yuqing’s research group from the School of Chemistry and Biological Engineering of Guilin University of Technology used a micro-arc oxidation layer as a transition layer, and homogenous metal oxides were used on the surface of the magnesium alloy. The zinc-based metal-organic framework (ZIF-8) composite coating was prepared by a one-step in-situ growth method. The composite coating shows strong hydrophobicity and self-cleaning properties, and the corrosion rate in neutral corrosive media is significantly reduced. The hydrophobic protection mechanism of the composite coating is discussed in principle. The research results show that the ZIF-8 composite coating can effectively prevent water and corrosive ions (Cl-) from penetrating the surface of the magnesium alloy, and help to improve the hydrophobicity and corrosion resistance of the magnesium alloy.
Recently, related results were published in the Journal of Magnesium and Alloys (SCI area TOP journal,The impact factor is 10.088) journals. This journal is 's first international academic journal focusing on magnesium and magnesium alloys. It is the only national leading international journal in the field of metal materials and metallurgy in the "China Science and Technology Journal Excellence Action Plan". It is located in the metallurgy and metallurgy indexed by the global SCI Engineering academic journal ranks 1st.
Wetland remote sensing field
High-precision classification and rapid monitoring of wetland vegetation are an important basis for systematic research on wetland structure and ecological functions, and provide necessary reference information for wetland protection and rational development. In recent years, the convolutional neural network algorithm (CNN) in deep learning has been used in the field of remote sensing, but how to use the CNN intelligent algorithm and multi-source remote sensing images for high-precision and high-efficiency classification of natural vegetation is still a challenge Difficult problem.
research flow chart
Not long ago, Fu Bolin, a young backbone teacher of the Intelligent Computing and Remote Sensing Application Laboratory of the School of Surveying, Mapping and Geoinformatics, for the first time used a new generation of Chinese high-spatial-resolution Earth observation satellite GF- 1. GF-2 and ZY-3, as well as the international earth observation satellites Sentinel-2A and Landsat 8 OLI, systematically explored the impact of different spatial resolution gradients and different spectral dimension combinations of remote sensing images on the classification accuracy of swamp vegetation, innovative Using multi-source images to explore the migration learning performance of the CNN algorithm in swamp vegetation, and compare the traditional pixel-based CNN classification method and the CNN classification method of fusion image segmentation to accurately identify the boundary of the wetland vegetation. The research results It provides a new idea for the intelligent identification and change detection of complex natural vegetation.
Related research results were published in the field of remote sensing with the title "Study on transfer learning ability for classifying marsh vegetation with multi-sensor images using DeepLabV3+ and HRNet deep learning algorithms" in the international authoritative journal International Journal of Applied Earth Observation and Geoinformation SCI area TOP,IF=5.933) in 2021.
Subduction zone magmatism research field
Sanukiite is an extremely unique and rare rock type, which has attracted extensive attention from many domestic and foreign geoscientists. In July, the research group of Professor Liu Xijun of the School of Earth Sciences of the school cooperated with Xiao Wenjiao academician of Xinjiang Branch of Chinese Academy of Sciences, and Professor Xu Jifeng of China University of Geosciences (Beijing) (Guilin University of Technology " 八桂 scholar") to cooperate with Central Asia The Sr-Nd-Hf-Pb multi-isotopic system of the Zanqi rock in the orogenic belt in northern Xinjiang has been studied. The results show that this magmatism was caused by the initial subduction of the ancient Asian ridge, and partial melting and melting of subducted sediments occurred. Mantle mixing. This achievement has played an important role in demonstrating the construction of the first-class discipline and doctoral program of "Geological Resources and Geological Engineering" in the School of Earth Sciences, and also reflects the improvement of the school's doctoral training quality in the field of earth sciences in recent years.
related achievements "Geochemistry and Sr–Nd–Hf–Pb isotope systematics of late Carboniferous sanukitoids in northern West Junggar, NW China: Implications for initiation of ridge-subduction" in the area of international SCI Published in the journal Gondwana Research (impact factor 6.051).
High-throughput single-molecule fluorescence spectroelectrochemical research field
The super-resolution fluorescence microscopy technology developed in recent years allows people to more accurately observe the microscopic world. This pioneering technology can increase the resolution of previous optical microscopy imaging by 20 times or even higher, bringing microscopy imaging to the "nano era".
Super-resolution fluorescence microscope combined with electrochemical cyclic voltammetry schematic diagram and super-resolution fluorescence microscope and electrochemical working cell coupling device diagram
At the end of June,Professor Lei Chenghong from the School of Chemistry and Biological Engineering and Senior Researcher Dr. Dehong Hu of the Pacific Northwest National Laboratory used the cross-correlation function method, which is usually only used for physical signal processing. The real redox events driven by electrochemical scanning are extracted from the single molecule fluorescence intensity-time trajectory, so as to obtain high-throughput accurate oxidation and reduction kinetic data of a single redox molecule, which is a comprehensive and accurate measurement of the oxidation of biological and chemical interfaces. The reduction state distribution opens up a new way for the in-depth study of the kinetics of the interface electron transfer process and the redox reaction mechanism.
The related results were published on the Analytical Chemistry published by the internationally renowned journal with the title High Throughput Mapping of Single Molecules’ Redox Potentials on Electrode. This journal is a top journal in the field of analytical chemistry, , and has many readers and a wide range of influences (Top1 area).
Real-time detection research field
Tyndall effect (Tyndall effect, TE) is a common light scattering phenomenon that occurs in colloidal solutions: when a beam of light passes through this type of solution, it enters from the vertical In the light direction, a bright "pathway" formed by colloidal particles scattering light can be observed. This phenomenon is named after it was first discovered and studied in 1869 by the British physicist John Tyndall (1820-1893). However, in the past 152 years, TE's high-efficiency colorimetric signal conversion characteristics and its analytical application potential have been almost completely ignored by scientists.
Hg2+ visual POCT detection principle schematic diagram based on nanosilver and its Tyndall effect
In mid-June, Professor Zhang Yun's group from the School of Chemistry and Biological Engineering and South-Central University for Nationalities Professor Fu Haiyan's group cooperate, for the first time explored the advantages of using the TE of colloidal silver nanoparticles (AgNPs) as the light scattering signal for the ultra-sensitive visual POCT detection of highly toxic divalent mercury ions (Hg2+). The research results show that the lower detection limit of Hg2+ of the new method is as low as 0.85 nM, which is thousands of times higher than the most widely used traditional colorimetric strategy based on AgNP-based surface plasmon resonance .
The related results were published in the field of chemical and biological sensing with the title "Tyndall-effect-enhanced supersensitive naked-eye determination of mercury (II) ions with silver nanoparticles". TOP in the first area, with an impact factor of 7.10).
Trench sediment Hf-Nd isotope decoupling research field
Trench sediment Hf, Nd isotopic composition has important indicator significance for understanding the material cycle of subduction zones, and is one of the frontier topics of earth system science. The Mariana subduction zone is a typical ocean-ocean subduction zone formed by the Pacific plate subducting westward under the Philippine plate. It is an ideal area for studying material circulation in the subduction zone.
Mariana Trench columnar (SY1 and SY2) sediment samples Hf-Nd isotope decoupling characteristics
In mid-June, Dr. Pang Chongjin from School of Earth Sciences and Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences , Yunnan University, Institute of Geology and Geophysics, Chinese Academy of Sciences, Chang'an University, Zhejiang UniversityThe sedimentary, mineralogical and geochemical characteristics of the sediments at a water depth of about 7000 meters on the north and south sides of the "Challenger Depth" of the Mariana Trench are analyzed, and the key factors affecting the Hf-Nd isotope decoupling of the Mariana Trench sediments are revealed. . The research results provide an important basis for explaining the complex and variable characteristics of Hf-Nd isotope decoupling of island arc magma.
Related results were published in the field of geosciences with Decoupling of Hf-Nd isotopes in Challenger Deep sediments, Mariana Trench: Implications for sedimentary Hf and Nd recycling in subduction zones. Internationally renowned journal Journal of Geophysical Research: Solid Earth One of the index journals).
Mantle Geochemistry Field
There is chemical heterogeneity in the Earth’s mantle, which is mainly manifested in the obvious differences in Pb isotopic characteristics of the mantle below the Pacific and Indian Oceans. Therefore, the Earth’s mantle can be divided into Pacific types based on isotopic geochemical characteristics. And the Indian Ocean-type mantle, but the reason for this difference in the isotope of the mantle has always been controversial around the world, and it is also the hot topic of cutting-edge science that international geoscientists are paying attention to.
In this regard, the research group of Professor Liu Xijun of the School of Earth Sciences at the school proved for the first time on a time scale that after the earth formed from the crust and mantle, the mantle maintains the low Th/U isotope characteristics for a long time. The research results redefine the heterogeneity of Pb isotopes in the mantle, which is essentially the difference in the characteristics of Th/U isotopes in the mantle, which promotes the understanding of the dynamic mechanism of the earth's interior.
The related research results are titled "Long-lived low Th/U Pacific-type isotopic mantle domain: Constraints from Nd and Pb isotopes of the Paleo-Asian Ocean mantle",Published in the Nature Index SCI area TOP journal Earth and Planetary Science Letters.
Bio-based sensor material field
Flexible wearable sensor has the advantages of softness, easy fit, high sensitivity and good stability. It can be attached to the surface of the object to be measured (such as the surface of human skin, etc.) to realize human movement And health monitoring has broad prospects in the fields of electronic skin equipment, human motion detection and implantable medical devices, and has attracted much attention.
Flexible wearable sensor and bending cycle durability test
In early June, the research group of Professor Shaorong Lu of the School of Materials Science and Engineering and Hunan University Professor Cai Ren's research group cooperated to modify sisal fiber As raw materials, a series of fast water-induced shape memory and pH stimulus response composite membranes can be prepared for use in smart resistance bending sensors. The resistive bending sensor made of the composite film has excellent water response shape memory, self-adhesive, bending sensitivity and other characteristics, and is expected to have potential applications in the fields of electronic skin, human-computer interaction, smart wearable devices, and personalized health monitoring. prospect.
The related achievement is titled Rapid water-responsive shape memory films for smart resistive bending sensors in International Top Academic Journal Nano Today 16.907).
For a long time, Guilin University of Technology has closely combined with national and regional development needs, respected the law of scientific and technological innovation and the development trend of interdisciplinary integration, and jointly cultivated or introduced high-level scientific research teams and scientific and technological talents.Pay attention to the transfer and transformation of scientific and technological achievements, popular science and other work, and the school's social service capabilities and social influence have been continuously improved. In the future, the school will continue to work hard to train more high-quality talents, vigorously improve the level of scientific and technological innovation, focus on enhancing social service capabilities, and make due contributions to building a magnificent Guangxi and fulfilling the dream of rejuvenation.
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Source: Guilin University of Technology official website, Guangming website, People's Daily Online
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