On the afternoon of March 28, 2023, Wang Bao, Chairman of Shenzhen SEG Group Co., Ltd.; Yang Hongyu, Vice General Manager; Sun Lina, General Manager of Human Resources Department; Lv Hao, General Manager of Strategic Department; Wang Jun, Brand Manager, and Deng Weifeng, Project General Manager of Shenzhen Special Information Co., Ltd., a delegation of six people, visited the Guangdong-Hong Kong Joint Research Center of Optical Fiber Sensing Technology at Shenzhen University for on-site inspection, research, and discussions. Professors Wang Yiping, He Jun, Chen Yuhui, and others from the research center attended the seminar. At the "Fiber Optic Sensing Technology and Applications" symposium, the director of the research center, Professor Wang Yiping, and Chairman Wang Bao introduced the members attending the symposium. Subsequently, Professor Wang Yiping gave an academic report entitled "Fiber Optic Sensing Technology and Applications," which covers topics about the fiber sensing innovation team, fiber sensor manufacturing technology, extreme environment fiber sensing technology, and life and health fiber sensing technology. After the report, Professor Wang Yiping led the experts to visit the cultural corridor and laboratories of the research center, and introduced in detail the development process, researchers, research conditions, and innovative achievements of the team. Finally, the two sides had in-depth discussions. Vice General Manager Yang Hongyu introduced SEG Group's strategic emerging industries, electronic market business, and property management business, emphasizing the application prospects of optical fiber sensing technology in property management. He looked forward to transfer the research center's achievements to Intelligent Properties. General Manager Sun Lina mentioned that SEG Group had always been eager to seek talents, and hopedto cooperate with the research center. Chairman Wang Bao concluded, "Cooperation between the two sides is not only a win-win situation, but also can contribute to the development of Shenzhen; Hopfully, there will be more exchanges and cooperation in the future".
Speaker: Prof. Richard FU (Northumbria University at Newcastle, UK)Inviter: Prof. Luo JingtingTime: March 16, 2023, 15:30-17:30 PMVenue: Room 1206, the Zhiyuan Building, Shenzhen University Abstract: Acoustic wave technologies have been widely used in radio-frequency communication, sensing, acoustofluidics and lab-on-a-chip applications. Recently flexible, bendable or wearable acoustic wave devices have received extensive attention as they could provide many exciting wearable or implantable applications. However, most of current SAW devices are made on bulk piezoelectric materials or piezoelectric films on rigid substrates, which are unsuitable for these applications, In this talk, challenges in material selections and structural designs for high-performance flexible and wearable acoustic wave devices are discussed. Fabrication strategies, wave mode evolution, and bending behavior, as well as their influence on device performance are introduced. Finally key potential applications in flexible and wearable sensors and lab-on-a-chip system with their major challenges in this field are highlighted. About the Speaker: Dr. Richard Fu, has been working as a full professor in Northumbria University (Newcastle, UK) after 2015. Before that, he has been a lecturer in Heriot-Watt University, and an associate professor in University of the West Scotland (Edinburgh, UK). Dr. Richard Fu received his PhD degree from Nanyang Technological University (Singapore), and worked as a postdoctoral researcher in the Singapore-MIT Allied Research Center, the University of Cambridge (UK).Dr. Fu has nearly thirty years of rich research experience in novel intelligent materials, thin films, sensors, microsystem devices, nano-material preparation and applications. His research focuses mainly on three original research fields: thin-film acoustic surface wave devices in microfluidics and biochip sensors; the micro-nano miniaturization of shape memory alloy thin films and composite materials for applications in microsystems and minimally invasive surgery; and applications of novel micro-nano structures intelligent material in engineering, detection, and energy. So far, he has published more than 450 SCI papers, two books, in the fields of thin films, physics, materials, and nanotechnology, renowned with a Google H-index of 71 and a total citation of more than 23,000. Much of his research have been published in top journals in the relevant fields, such as Nature Communications, Progress in Materials Science, Advanced Materials, Advanced Functional Materials, Advanced Science, ACS Nano, Small, , Materials Horizons, Nano Energy, Nano Letters, etc.
Speaker: Prof. Jiang Junfeng (Tianjin University)Inviter: Prof. Qu JunleTime: April 6, 2023, 10:00-10:40 AMVenue: Room 1206, the Zhiyuan Building, Shenzhen University Abstract:Rapid development of life science and medicine asks for continuous research and creation of new sensing technologies. In the 1st part of the seminar, I will talk about Optical Fiber Sensors associated with echo wall resonance in the micro-cavity, including high-sensitivity temperature sensors, biosensors based on liquid crystal enhancement, laser enhancement, and microwave photon demodulation. In the 2nd part, I will talk about Optical Fiber Sensors together with OCT to monitor the cardiovascular system, including all-fiber guided OCT system, vascular imaging and processing, three-dimensional reconstruction of the coronary by fusion of IVOCT and DSA, polarization-sensitive Catheter OCT system and its mathematical solution. Finally, I will talk about Optical Fiber Sensors associated with CARS, including wavelength modulation based on polarization vector adjustment and double solitons, time-frequency mixed wavelength modulation based on SSFS and chirped pulse delay, optic fiber probe excitation, etc. About the Speaker:Jiang Junfeng is a professor, PhD supervisor in School of Precision Instrument and Optoelectronics Engineering, Tianjin University. He has been awarded with various talent programs, including National Innovation Research Program for Extinguished Scholars, National Key Research and Development Program, Innovation and Entrepreneurship Grant of the Tianjin City in the area of Optical Fiber Sensors. He is also in charge of many research centers, including the director of Tianjin Fiber Optic Sensing Engineering Center, the executive vice director of the Tianjin International Joint Research Center for Fiber Optics and Photonics, and the vice director of the Fiber Optic Sensing Research Institute of Tianjin University. Additionally, he serves as an executive member for many associations, including the Optical and Optoelectronic Technology Committee of the Chinese Optical Society, Opto-Mechatronics/Integration Branch and the Geological Instrument Branch of the Chinese Society of Instrumentation. Professor Jiang has been the main PI of many research grants, including the National Key Research and Development Program, the National Key Foundation of Natural Science, the National 973 Program project, the National Key Scientific Instruments and Equipment Development Project, and the Consulting Research Project of the Chinese Academy of Engineering. He has published over 160 SCI papers, 5 books, been granted with 8 US innovation patents and 101 Chinese innovation patents. He has also received many rewards, including the National Science & Technology Progress Award (2nd award, Once), the National Teaching Achievement Award (2nd award, Once), Provincial and Ministerial-level Science and Technology Awards (1st prizes, 6 times), the Chinese Patent Gold Award (Once), the Chinese Patent Excellence Award (2 times), and Tianjin Science and Technology Award for Young Scientist, etc. Anyone interested is welcome to attend.
The journal entitled with "Unveiling the Selenization Reaction Mechanisms in Ambient Air-Processed Highly Efficient Kesterite Solar Cells" is published on March 12th, 2023. (Adv. Energy Mater.2023, 2300521) https://onlinelibrary.wiley.com/doi/epdf/10.1002/aenm.202300521The selenization annealing process is vital for highly efficient kesterite solar cells. Generally, SnS is added during the selenization process, but excessive S and related defects are introduced. Meanwhile, the path of supplementing Sn has never been elucidated. Herein, in order to solve the above prob-lems, a combination of strategies involving SnS and Sn or SnSe or SnSe2 is put forward. And the composition of the vapor inhibiting Sn loss (gaseous SnSe3) and the pathway through which SnSe3 facilitates the formation of Cu2ZnSn(SxSe1-x)4 (CZTSSe) are clarified. When SnSe2 is added to SnS in the selenization process, grain fusion is effectively promoted. The high crystal-line quality kesterite absorber makes the band bending at the GBs optimal and the interface recombination be effectively suppressed. Moreover, cation disorder is remarkably reduced. Therefore, the open-circuit voltage (Voc) is significantly elevated from 508 to 546 mV with increased fill factor (FF) and short-circuit current density (Jsc). A state-of-the-art ambient air-processed kesterite device with 12.89% efficiency is achieved, and the unveiled reaction mechanisms have guiding significance for further optimizing selenization atmosphere and elevating the efficiency of CZTSSe solar cells.This work was supported by National Natural Science Foundation of China (Nos. 62074102 and 62204067) China, Science and Technology plan project of Shenzhen (No. 20220808165025003) China. Guangdong Basic and Applied Basic Research Foundation (No. 2022A1515010979) China.
NEWSAt the 3rd National Photonic Technology Forum (Guangzhou City, March, 31st to April, 3rd ,2023), Professor Wang Yiping's team (Shenzhen University, Shenzhen Photonic Sensing Technology Co. Ltd.), released for the first time in China, the fully automatic fs-laser direct writing technology and device for fabrication of large-scale fiber grating arrays. Patented technology first released in China The advanced technology enables highly efficient and fully automated preparation of large-scale series/parallel integrated fiber grating (including weak reflection point) arrays with length at the km level , for both single-core and multi-core optical fibers. The superiority is listed as followed: direct writing through a layer of coating, no mask, no hydrogen loading, no secondary coating, and spool-to-spool fiber processing. Computer controlled fully automatic grating preparation procedures are listed as followed: fiber movement, clamping, fiber take-in, fiber take-out, fiber core alignment, laser focusing and exposure. Sample products retain the original tensile strength of the pristine fiber, are resistant to high temperatures, and show excellent long-term stability. Key performance indexes of the sample products are listed as followed: the grating wavelength of the large-scale weak-reflection fiber grating array unveiled onsite is 1550 nm, minimum grating length is<0.5 mm, minimum grating pitch is <0.5 mm, minimum reflectivity is <1 grating="" quantity="" is="">10,000, extinction ratio is 15 dB. Key performance indexes can be customized on demand. Flexible customization for a wide range of applications Large-scale fiber grating arrays are highly and broadly demanded in distributed fiber-optic sensing for oil & gas exploration, perimeter security, bridges and dams monitoring, aerospace fields, etc. They play a vital role to improve measurement accuracy, sensing distance, spatial resolution, and other key indexes of technologies such as DAS, DTS and OFDR. It is an important "booster" of distributed fiber-optic sensing technology. Follow us by scanning the code
Guest Speaker: Sami Ramadan, Senior Research Fellow, School of Materials Engineering, Imperial College London, UKInviter: Associate Professor Fu ChenTime: 16:00 PM, November 13, 2023Location: Conference Room 1206, Original buildingAbout the Guest:Professor Sami Ramadan is a senior Research fellow in Materials Engineering at Imperial College London. He has long been engaged in the basic and applied research of MEMS, semiconductor devices and processes, 2D materials and heterostructural functional materials. He graduated from the Department of Electrical Engineering, Newcastle University, UK. He has presided over EPSRC, CRUK and other funded scientific research projects, and supervised a number of doctoral students and master students in ACS Nano, ACS Sensors, Biosensors and Bioelectronics, More than 20 academic papers have been published in international academic journals such as Nanotechnology.Brief introduction to the report:Rapid, simple and low-cost detection of disease biomarkers in easily accessible bioliquids such as saliva, nasopharyngeal swabs, blood, and urine currently represents the most promising approach for early detection of common diseases like cancer, neurogenerative and cardiovascular, as well as virus infections. Regular screening of large numbers of individuals in point-of-care settings could enable more targeted early interventions and therapies. At the same time, the global threat of infectious diseases requires a flexible, rapid and low-cost sensor platform for the detection of viral infections. Electrical biosensors based on graphene are promising devices in this regard as they can enable high sensitivity, selectivity, fast, and label-free detection. This presentation highlights an overview of our recent progress of using graphene field-effect-transistors for the detection of different disease biomarkers such as cancer, neurodegenerative, and COVID-19 in complex mediums. The key challenges of sensing in physiological solutions, and their potential solutions will be addressed.All teachers and students are welcome to attend!