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Oxygen-assisted preparation of mechanoluminescent ZnS：Mn for dynamic pressure mapping

Nano Research 2018年第4期11卷 1967-1976页

作者： Xiandi Wang Rui Ling Yufei Zhang Miaoling Que Yiyao Peng Caofeng Pan Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences Beijing 100083 China CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology (NCNST) Beijing 100190 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Aerospace Materials and Performance (Ministry of Education) School of Materials Science and Engineering Beihang University Beijing 100191 China

Mechanoluminescent materials that convert mechanical stimuli to light emission have attracted extensive attention for potential applications in human-machine interactions. Here, we report a simple and available novel approach for the oxygen-assisted preparation of ZnS：Mn particles by solid-state reaction at atmospheric pressure without the formation of the corresponding oxides. The existence of O2 has a positive impact on the formation of S vacancies in wurtzite-phase ZnS, leading to the introduction of Mn2＋ ion luminescent centers and shallow donor levels, which can improve the electron-hole recombination rate. The O2 ratio and Mn2＋ ion doping concentration have significant effects on the luminous efficienc）5 which is optimal at 1%-20% and 1 at.%-2 at.% respectively. In addition, a device based on the piezo-photonic effect with excellent pressure sensitivity of 0.032 MPa-1 was fabricated, which can map the two-dimensional pressure distribution ranging from 2.2 to 40.6 MPa in situ. This device can be applied to real-time pressure mapping, smart sensor networks, high-level security systems, human-machine interfaces, and artificial skins.

关键词： oxygen assistance piezo-photonic effect pressure mapping ZnS:Mn

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Self-powered high-resolution smart insole system for plantar pressure mapping

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BMEMat(BioMedical Engineering Materials) 2023年第1期1卷 80-90页

作者： Qiuqun Zheng Xingyi Dai Yinghui Wu Qihua Liang Yongpeng Wu Jingkun Yang Biqin Dong Guojun Gao Qi Qin Long-Biao Huang Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina College of Civil and Transportation Engineering Shenzhen UniversityShenzhenChina Institute of Microstructure Technology Karlsruhe Institute of TechnologyKarlsruheGermany

Accurate plantar pressure mapping systems with low dependence on the external power supply are highly desired for preventative healthcare and medical ***,we propose a self-powered smart insole system that can perform both static and dynamic plantar pressure mapping with high *** smart insole system integrates an insole-shaped sensing unit,a multi-channel data acquisition board,and a data storage *** smart insole consists of a 44-pixel sensor array based on triboelectric nanogenerators(TENGs)to transduce pressure to the electrical *** optimizing the sensor architecture and the system's robustness,the smart insole achieves high sensitivity,good error-tolerance capability,excellent durability,and short response–recovery *** gait and mobility patterns,such as standing,introversion/extraversion,throwing,and surpassing obstacles,can be distin-guished by analyzing the acquired electrical *** work paves the way for self-powered wearable devices for gait monitoring,which might enable a new modality of medical diagnosis.

关键词： high-resolution pressure mapping self-powered sensors smart insoles wearable devices

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Muscle recruitment patterns and saddle pressure indexes with alterations in effective seat tube angle

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Sports Medicine and Health Science 2022年第1期4卷 29-37页

作者： Reece McDonald Wendy Holliday Jeroen Swart Department of Human Biology Faculty of Health SciencesUniversity of Cape TownSouth Africa

Alteration of the effective seat tube angle(ESTA)may affect muscle activation patterns of the lower limbs in *** is conflicting evidence due to inadequate kinematic controls in previous *** primary aim of this study was to determine the muscle activity of seven lower limb muscles during alterations of the ESTA by altering the position of both the handlebars and saddle forwards or backwards by 3 cm while ensuring controlled ***,to determine the effect on the saddle pressure *** participants performed two 5 min electromyography(EMG)trials at 70%of peak power output(PPO)for three consecutive *** was a significant increase in muscle activity in the biceps femoris,gluteus maximus,and medial gastrocnemius with reductions in ESTA while a significant increase in tibialis anterior with increases in ESTA was *** pressure indices demonstrated a significant change in frontal versus back pressure as well as mean pubic pressure with changes in *** in the ESTA affects muscle activity in some,but not all of the lower limb *** research needs to be conducted to adequately understand the mechanism behind the differences in muscle activation.

关键词： EMG Muscle recruitment Seat tube angle pressure mapping

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