Article
Engineering, Electrical & Electronic
Xiuhua Yang, Dunzhu Xia, Jinhui Li, Qingbo Chu
Summary: This article proposes a novel micro-opto-electromechanical system (MOEMS) accelerometer sensor based on metal-insulator-metal (MIM) waveguide wavelength modulation. The device detects external acceleration vibration signals through a mechanical sensing system and utilizes the MIM waveguide in the optical sensing system to measure the displacement of the mechanical vibration component, causing a change in light wavelength. Simulation results demonstrate that this accelerometer sensor has high sensitivity and resolution, making it suitable for high-precision measurements.
IEEE SENSORS JOURNAL
(2023)
Review
Chemistry, Multidisciplinary
Zongtao Ma, Ziying Wang, Lingxiao Gao
Summary: This review discusses the recent research advances of gas sensors under light activation, focusing on the improved properties and applications of gas sensors with enhanced sensitivity, shortened response time, and reduced operating temperature.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Analytical
Kun Tang, Xiangdong Chen, Xing Ding, Xuan Zhao, Xiang Yu, Xinglin Yu, Xinpeng Chen
Summary: This study investigated the response characteristics of capacitive humidity sensors based on fullerene loaded with metal nanoparticles. Results showed that the sensitivity was significantly improved, with different metal nanoparticles leading to varying enhancement effects. Different materials can be selected for developing humidity sensors tailored to specific application needs.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Biophysics
Edoardo Cuniberto, Abdullah Alharbi, Zhujun Huang, Ting Wu, Roozbeh Kiani, Davood Shahrjerdi
Summary: The sensitivity of substrate-supported nano-graphitic micro-sensors in response to dopamine was found to increase linearly with the inverse of the upper potential limit (UPL) in voltammetry experiments. This unexpected dependence was attributed to the UPL-induced electrostatic force that influences the steady-state number of dopamine molecules on the sensor surface, providing a new strategy for enhancing the performance of planar electrochemical micro-sensors.
BIOSENSORS & BIOELECTRONICS
(2021)
Article
Chemistry, Analytical
Yuefeng Gu, Danfeng Chen, Tiancheng Wu, Junyang Hao, Zhigang Zhang, Zhicheng Zhu, Fangfang Xue, Shan He, Qiuhong Li
Summary: Gas sensors are essential in connecting humans and health by monitoring the gas quality in living spaces. PtNi3-WO3 gas sensors demonstrated superior selectivity, sensitivity, and stability to formic acid, making them suitable for indoor air gas monitoring.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Electrical & Electronic
Tung-Lin Chien, Fuchi Shih, Yuanyuan Huang, Yen-Lin Chen, Weileun Fang
Summary: This study presents the design and implementation of a capacitive type pressure sensor with vertically integrated deformable hermetic chambers. The proposed sensor features improved sensitivity and has been evaluated through simulations and experiments. The results show a significant enhancement in sensitivity within a certain pressure range.
IEEE SENSORS JOURNAL
(2022)
Article
Optics
Fatemeh Ghasemi, Mohsen Ghasemi, Leila Eftekhari, Vishtasb Soleimanian
Summary: Thin films of pure and doped indium oxide (In2O3) were grown by thermal evaporation and studied for their characteristics. The films doped with 3% Ag showed the highest roughness and sensitivity to ethanol vapor. The results indicated that the presence of metal impurities affected the optical, microstructural, and gas sensing parameters of the samples.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Joon Hyong Cho, David Cayll, Dipankar Behera, Michael Cullinan
Summary: The demand for graphene-based devices is rapidly growing, but there are significant challenges in the manufacturing process. Despite recent breakthroughs in basic research, integrating graphene with Micro-Nano Electromechanical Systems remains challenging. Therefore, achieving large-scale, repeatable production is still a major barrier to the commercialization of graphene.
Article
Chemistry, Physical
Junfang Shu, Ruirui Yang, Yongqin Chang, Xingqi Guo, Xing Yang
Summary: This study introduces a flexible metal thin film strain sensor with micro/nano structure, which has a large measurement range and high sensitivity strain measurement. It can achieve a maximum strain measurement range of 80% and a gauge factor of 20, with good repeatability and stability, suitable for real-time monitoring of human joint states.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Guolin Yun, Shi-Yang Tang, Hongda Lu, Tim Cole, Shuaishuai Sun, Jian Shu, Jiahao Zheng, Qingtian Zhang, Shiwu Zhang, Michael D. Dickey, Weihua Li
Summary: Conductive elastic composites are increasingly used in flexible sensors, wearable devices, and stretchable electronics. A study shows that a composite material with spike-shaped nickel microparticles and liquid metal microdroplets has a unique strain response, increasing electrical conductivity sharply under compressive and tensile loads. This composite material offers extremely high stretchability and pressure sensitivity, making it ideal for tactile sensing and mechanical responsiveness.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Peiji Sun, Xuan She, Junjie Yao, Kan Chen, Ran Bi, Lei Wang, Xiaowu Shu
Summary: This paper presents a monolithic integrated micro-opto-electromechanical system (MOEMS) accelerometer based on the Michelson interferometer structure, with high precision, large measurement range, and small size, which may pave the way for applications in civil, industrial, and military fields.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Xingtai Chen, Tao Liu, Zhaoru Li, Xi-Tao Yin
Summary: Gas sensors, especially metal oxide semiconductors, have been widely used in various fields, and modification methods such as special structures, doping, and precious metal loading can improve their gas-sensitive performance. This review summarizes the progress in the modification of metal oxides, including their response, selectivity, and operating temperature, and focuses on the gas-sensitive mechanisms. The bottlenecks and future development prospects of current metal oxide semiconductor n-Butanol gas sensors are also discussed.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Haoyuan Cai, Mengwei Wang, Zhuohui Wu, Jing Liu, Xiaoping Wang
Summary: We propose a high-sensitivity SPR biosensor based on a multilayer structure consisting of Au, MoS2, and graphene. Numerical simulations and experiments demonstrate that the sensor has a sensitivity about 2 times higher than the conventional Au-based SPR sensor, and the presence of MoS2 enhances the sensitivity. The fabricated sensor shows a very low limit of detection for okadaic acid.
Review
Public, Environmental & Occupational Health
Anup M. Upadhyaya, Mohammad Kamrul Hasan, S. Abdel-Khalek, Rosilah Hassan, Maneesh C. Srivastava, Preeta Sharan, Shayla Islam, Asma Mohammed Elbashir Saad, Nguyen Vo
Summary: Optical micro-electromechanical systems (MEMS) combine micro-optics, mechanical elements, and electronics for sensing and influencing optical signals on a micron-level. These devices are widely used in inertial navigation, accelerometers, and gyroscopes due to their miniaturized size, affordability, and lightweight characteristic. The demand for various photonic devices, especially Fibre Bragg Grating (FBG) sensors, is increasing in biomedical applications, while other sensing systems are still in experimental stages. Miniaturization of complete FBG devices for biomedical applications is a future area of focus.
FRONTIERS IN PUBLIC HEALTH
(2021)
Article
Multidisciplinary Sciences
Md Shamim Sarker, Hiroyasu Yamahara, Lihao Yao, Siyi Tang, Zhiqiang Liao, Munetoshi Seki, Hitoshi Tabata
Summary: Magnonics, an emerging research field that uses spin waves as data carriers, has the potential to dominate the post-CMOS era with its ultra-low power operation. In this study, a highly sensitive and low power magnetic sensor was designed using a simple CoFeB/Y3Fe5O12 bilayer structure. Experimental observations demonstrated a frequency shift of 20 MHz upon the application of an external magnetic field of 0.5 mT, indicating a sensitivity of 10(-2) mT order. The sensitivity can be further enhanced by tuning the width of the CoFeB metal stripe.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Zhenzhu Wang, Feng Yang, Jiangfeng Ni, Liang Li
Summary: This article reports a simple two-step operation, hydrogenation and fluorination, to modulate the structure and surface of TiO2, resulting in high electrical conductivity and robust surface activity. The modulated TiO2 exhibits strong performance in sodium-ion storage, and when paired with a commercial cathode, it achieves higher power output.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Condensed Matter
Sumit Kumar, Rajneesh Chaurasiya, Mustaque A. Khan, Gang Meng, Jen-Sue Chen, Mahesh Kumar
Summary: We developed a highly selective and sensitive H2S sensor based on CuO thin film, which was enhanced by decorating with rGO nanosheets. The CuO thin film was deposited using Chemical Vapor Deposition, and the sensing response was improved by forming heterojunctions with rGO. The developed sensor showed high selectivity towards H2S gas and the improvement in sensing response was attributed to increased hole concentration in CuO and increased absorption of H2S molecules.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Chemistry, Physical
Xueyan Shan, Shimao Wang, Mengyu Fu, Xiao Zhao, Toru Aoki, Volodymyr Gnatyuk, Zanhong Deng, Ruhua Tao, Xiaodong Fang, Gang Meng
Summary: This study proposes a non-contact approach based on excimer laser irradiation to precisely prepare a PbI2 passivation layer on the surface of perovskite films, resulting in a significant improvement in the performance of perovskite solar cells.
JOURNAL OF POWER SOURCES
(2023)
Review
Optics
Diandian Wang, Wenjie Cheng, Chao Wang, Min Zhou, Wei Tian, Liang Li
Summary: Metal halide perovskite materials have excellent photoelectric properties, but need to be endowed with more functionality for practical applications. This review summarizes the basic design principles of functionalized perovskite devices, presents recent advances and specific requirements, and outlines potential challenges and future research directions in this field.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Tiantian Dai, Zanhong Deng, Meng Li, Shimao Wang, Mengxiao Chen, Gang Meng
Summary: Metal oxide semiconductor (MOS)-based chemiresistors have been widely used for detecting harmful gases due to their small size, low cost, integratability, and ease of use. Power consumption is a critical parameter, and self-heating working mode has attracted significant attention for reducing power consumption.
Article
Nanoscience & Nanotechnology
Longqing Mi, Zanhong Deng, Junqing Chang, Sunil Kumar, Meng Li, Ruofan Zhang, Dandan Rong, Mahesh Kumar, Shimao Wang, Yong He, Gang Meng
Summary: This study proposes a pulsed UV light modulation (PULM) photoactivation protocol, which allows the exploitation of nanomaterials for sensitively detecting trace toxic gas molecules. PULM enables the generation of surface reactive oxygen species and refreshes the surface of chemiresistors without the side effects of UV-induced desorption and decline of base resistance. PULM significantly improves the response rate to 20 ppb NO2 from 1.9 (continuous UV) to 131.1 (PULM UV-off) and reduces the limit of detection from 2.6 ppb (continuous UV) to 0.8 ppb (PULM) for a ZnO chemiresistor.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Sumit Kumar, Rajneesh Chaurasiya, Shashank Shekhar Mishra, Partha Kumbhakar, Gang Meng, Chandra Sekhar Tiwary, Krishanu Biswas, Mahesh Kumar
Summary: In this study, researchers reported a highly sensitive and selective NO2 sensor fabricated through low-cost and scalable methods using a hybrid nanocomposite of two-dimensional Al70Co10Fe5Ni10Cu5 quasicrystal (QC) nanosheets and MoS2 nanoflakes. The Al70Co10Fe5Ni10Cu5/MoS2 heterostructure showed an excellent gas-sensing response of about 66%, which is 2.27 times higher than that of the pristine MoS2 nanoflakes-based sensor. The integration of the 2D Al70Co10Fe5Ni10Cu5 QC with MoS2 nanoflakes holds great promise in the design and development of NO2-based gas-sensing technology.
ACS APPLIED NANO MATERIALS
(2023)
Article
Physics, Applied
Yanan Song, Shimao Wang, Xiao Zhao, Qianqian Hu, Changbao Huang, Gang Meng, Volodymyr Gnatyuk, Youbao Ni, Haixin Wu
Summary: Through investigating the electrical properties and x-ray detection performance of CdSe single crystals grown by the pressure-assisted vertical Bridgman method, it was found that the enhanced trapping-detrapping effect at liquid nitrogen temperature significantly improved the x-ray photocurrent and response time. The mobility-lifetime product of CdSe single crystals also increased from 1.39 x 10(-5) to 5.34 x 10(-4) cm(2) V-1 with temperature lowering. Furthermore, CdSe single crystal-based x-ray detectors demonstrated ultrahigh sensitivity and extremely low detection limit at liquid nitrogen temperature, making them a promising candidate for x-ray detection applications.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Sunil Kumar, Veronika A. Dmitrieva, Gang Meng, Stanislav A. Evlashin, Ekaterina V. Sukhanova, Dmitry G. Kvashnin, Zakhar I. Popov, Alexander G. Bannov, Fedor S. Fedorov, Albert G. Nasibulin
Summary: We improved the sensitivity of NO2 analyte by adjusting the width ratio of adjacent graphene oxide (GO) and reduced graphene oxide (rGO) layers using GO laser reduction technique. The reduction of GO led to a chemiresistive response to NO2, and an optimum GO/rGO width ratio achieved a chemiresistive response of 18.1% towards 100 ppm of NO2 with a limit of detection of 230 ppb. The enhanced chemiresistive response of GO/rGO sensors to NO2 physisorption was attributed to increased sorption energy and improved charge transfer at the GO/rGO interface area compared to fully reduced GO.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Longqing Mi, Zanhong Deng, Junqing Chang, Meng Li, Ruofan Zhang, Shimao Wang, Libing You, Xiaodong Fang, Yong He, Gang Meng
Summary: We demonstrated that the humidity tolerance of a ZnO chemiresistor can be significantly improved by H2O2 treatment. The H2O2-treated ZnO chemiresistor shows stable operation under a highly humid air background and the response to O3 can be further enhanced by pulsed UV light modulation.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Junqing Chang, Chaohao Hu, Zanhong Deng, Meng Li, Chengyin Shen, Shimao Wang, Longqing Mi, Ruofan Zhang, Qingli Zhang, Gang Meng
Summary: In this study, a chemiresistor composed of hexahedral particles SBO-loaded CdS nanoparticles was prepared for the sensitive and selective detection of methyl mercaptan. The CdS/SBO chemiresistor exhibited a high response to 100 ppm MM at a low operating temperature (100 °C) and showed good selectivity, weak humidity interference, and a low limit of detection. This material has the potential for practical applications in air quality monitoring.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Xiao Zhao, Shimao Wang, Fuwei Zhuge, Nengwei Zhu, Yanan Song, Mengyu Fu, Zanhong Deng, Xiaodong Fang, Gang Meng
Summary: In this work, high-quality CsPbBr3 single crystals with cuboid shape are successfully prepared by introducing a solution refinement strategy. The as-grown CsPbBr3 single crystals exhibit low trap density and high carrier mobility, and the CsPbBr3-based photodetector shows excellent performance in light detection, especially ultrasensitive weak light detection.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)