Review
Chemistry, Multidisciplinary
Haodong Liu, Hongjian Zhang, Wenqi Han, Huijuan Lin, Ruizi Li, Jixin Zhu, Wei Huang
Summary: The revolutionary advancements in flexible electronics offer great potential for wearable devices and electronic skin, with flexible strain sensors serving as essential components in integrated electronic systems. 3D printing technology is preferred for manufacturing flexible strain sensors due to its cost-effectiveness, accuracy, and efficiency. Various printing methods, such as DLP, FDM, and DIW, are discussed in this study, along with the sensing mechanisms of the printed sensors and suggestions for future research directions.
ADVANCED MATERIALS
(2021)
Review
Chemistry, Physical
Yizong Li, Yuxuan Liu, Shah Rifat Alam Bhuiyan, Yong Zhu, Shanshan Yao
Summary: This review provides an overview of recent advancements in printed strain sensors for on-skin electronics, covering sensing mechanisms, printing techniques, materials, structures, printing processes, and potential applications in healthcare, sports performance monitoring, and human-machine interfaces. The challenges and opportunities for future research in this field are also discussed.
Article
Engineering, Electrical & Electronic
M. Ntagios, Ravinder Dahiya
Summary: This work presents a soft, flexible, and low-cost capacitive pressure-sensitive insole developed using resource-efficient single-step 3D printing method. The insole exhibits excellent pressure response and sensitivity, making it a promising solution for applications such as gait analysis and robotics.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Robert Brooke, Kosala Wijeratne, Kathrin Hubscher, Dagmawi Belaineh, Peter Andersson Ersman
Summary: Large area manufacturing of printed electronic components on A4-sized substrates is achieved using screen printing and vapor phase polymerization. The resulting conductive polymer patterns have high resolution and can be adjusted in thickness. The polymer films produced using this method show improved surface roughness, higher conductivity, and better resolution compared to commercial screen printing ink. Organic electrochemical transistors fabricated through vapor phase polymerization demonstrate excellent performance in terms of switching behavior and amplification factor.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Composites
Yunpeng Yang, Haijun Wang, Yunyou Hou, Siqi Nan, Yongyue Di, Yu Dai, Fei Li, Jie Zhang
Summary: This paper presents a study on flexible strain sensors based on conductive composites, which are fabricated using screen printing to form different patterns for various strain measurement needs. The sensors demonstrate high sensitivity, good linearity, and excellent stability, repeatability, and dynamic response. The printed strain sensors have potential applications in motion detection, sport and rehab training, and structure health monitoring.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Ulrika Boda, Ioannis Petsagkourakis, Valerio Beni, Peter Andersson Ersman, Klas Tybrandt
Summary: The challenge of high-performance fully printed stretchable OECTs is addressed by developing fully screen-printed stretchable OECTs. Three stretchable functional screen-printing inks are developed, enabling the fabrication of OECTs. The stretchable OECTs show good characteristics and can withstand high strains. An electrochromic smart pixel is demonstrated by connecting a stretchable OECT to a stretchable electrochromic display. The development of screen-printed stretchable electrochemical devices, particularly OECTs, is believed to pave the way for their use in wearable applications and commercial products.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Xuanyi Hu, Jiayun Feng, He Zhang, Jingxuan Ma, Zhuohuan Wu, Jiayue Wen, Shang Wang, Yanhong Tian
Summary: As an essential part of flexible and printed electronics, flexible strain sensors made of silver nanowires (AgNWs) have recently gained significant attention. However, the stability and sensitivity of AgNW-based flexible strain sensors are hindered by low resolution and large wire-wire contact resistance. In this study, a self-reduced soldered AgNW pattern is created by combining high-resolution electrohydrodynamic (EHD) printing and joining of AgNWs. The EHD printing achieves a resolution up to 20 μm. The contact resistance between AgNWs is greatly reduced by depositing Ag atoms at the AgNW junctions during the EHD printing process. After the self-reduced soldering process, the sheet resistance decreases from 14.8 to 2.13 Ω sq(-1). This process can be conducted at room temperature and ambient conditions without the need for external assistance. Furthermore, the deposited Ag atoms at the junctions significantly improve the sensitivity (gauge factor 14.5-37.9) and stability (over 5000 stretching cycles with 25% strain). The nano-junctions induced by the self-reduced soldering process contribute to the superior sensitivity and stability, enabling a robust network structure. This EHD-based technique for nanojoining of AgNWs demonstrates its potential for flexible and wearable electronics.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Analytical
Safoora Khosravi, Saeid Soltanian, Amir Servati, Ali Khademhosseini, Yangzhi Zhu, Peyman Servati
Summary: Wearable sweat biosensors embedded in textile substrates have gained attention for noninvasive monitoring of health parameters. A flexible electrochemical glucose sensor that can be screen-printed onto a textile substrate is demonstrated, achieving a linear response in the range of 20-1000μM of glucose concentration with high sensitivity and stability. These textile-based biosensors show high selectivity towards glucose and have the potential to impact the next generation of wearable devices.
Article
Engineering, Electrical & Electronic
Xiaobo Zhu, Zhentao Qian, Xue Chen, Liping Liu, Chuanxiang Sheng, Wenhua Gu
Summary: A novel design of AgNP-based FPSs is proposed and verified using electrohydrodynamics-printing technology, resulting in an increase of the gauge factor from 8 to 286.8. Experimental demonstrations show that the key to this improvement lies in the localized micro-zone piezoresistance effect.
IEEE SENSORS JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Hao Dong, Wenxin Liu, Yi Li, Xing Chen, Di Wang
Summary: A novel precursor ink is proposed in this study, enabling the fabrication of a wearable UV sensor on a flexible substrate through a fully printed approach. The sensor exhibits outstanding sensitivity and rapid response characteristics. The baseline resistance of the sensitive material can be adjusted by incorporating silver nanoparticles into the ink.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Aerospace
Douglas C. Hofmann, Punnathat Bordeenithikasem, Yuhang Zhu, Yufei Liu, Nathan J. Conrad, B. Alan Davis, Eric L. Christiansen, Ali Shakouri, Saeed Mohammadi
Summary: In this study, a passive sensor system for spacecraft shield against micrometeoroid and orbital debris (MMOD) was developed. The sensor was fabricated using a conductive metal ink screen-printed on flexible Kapton, suitable for low-cost fabrication of large areas of sensors. The sensor was integrated into a low density, two-wall Whipple shield and tested with hypervelocity impacts to determine the impact size, impact location, and predict the impact energy of the damage.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Peter Andersson Ersman, Jerry Eriksson, Darius Jakonis, Sandra Pantzare, Jessica Ahlin, Jan Strandberg, Stefan Sundin, Henrik Toss, Fredrik Ahrentorp, Kaies Daoud, Christian Jonasson, Henrik Svensson, Greger Gregard, Ulf Naslund, Christer Johansson
Summary: This study presents screen printed piezoelectric sensors laminated between glass panes in the temperature range of 80-110 degrees C. The sensors showed no degradation of the piezoelectric signals at 110 degrees C, despite approaching the Curie temperature of the piezoelectric material. The sensors were characterized by monitoring force impact in smart glass applications using a calibrated impact hammer system and standardized impact situations.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Ping Ren, Jingyan Dong
Summary: The study focuses on the development of foldable sustainable electronics using electrohydrodynamic (EHD) printing to fabricate PEDOT:PSS/graphene composite circuits on polyvinyl alcohol (PVA) films. The printed electronics demonstrate good foldability and mechanical stability, and maintain stable electronic response even after multiple folding and unfolding cycles. The use of printed PEDOT:PSS/graphene circuits as resistive temperature sensors for body temperature and respiration monitoring is also presented, highlighting their potential for transient electronics and biodegradability.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Food Science & Technology
Chongze Yue, Jingyi Wang, Zhiqiang Wang, Boyang Kong, Guiying Wang
Summary: The growing concern and demand for food safety in society have created the need for intelligent portable devices to monitor the entire food process from production to table. Flexible printed electronics technology, which combines various important technologies, provides one of the most promising solutions to this challenge. While there have been successful developments in this field, such as flexible printed sensors and radio frequency identification systems, the technology is still not mature enough. This review provides a comprehensive introduction to the different aspects of flexible printed electronics technology and focuses on its application in food quality monitoring and intelligent food packaging in recent years.
Review
Engineering, Environmental
Danyao Song, Xujun Chen, Meng Wang, Zihao Wu, Xinqing Xiao
Summary: In recent years, the convergence of 3D printing technology and flexible sensors has played a crucial role in various fields, particularly in industrial production. The utilization of 3D-printed flexible sensors in the realm of food analysis and monitoring enables real-time monitoring and accurate detection, providing cost-effective solutions for ensuring food safety.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Wei Wu, Yabo Xie, Xiu-Liang Lv, Lin-Hua Xie, Xin Zhang, Tao He, Guang-Rui Si, Kecheng Wang, Jian-Rong Li
Summary: Expanding the structural diversity of porphyrinic metal-organic frameworks (PMOFs) is crucial for developing functional materials with novel properties or improved performance. This study presents a strategy for constructing rare-earth (RE) PMOFs with unprecedented topologies through rational functionalization of porphyrinic ligands. By introducing phenyl/pyridyl groups to the meso-positions of the porphyrin core, the symmetries and connectivities of the ligands are adjusted, resulting in the successful synthesis of three new topologies of RE-PMOFs (BUT 224/-225/-226). Moreover, BUT-225(Co), which possesses both Lewis basic and acidic sites, exhibits enhanced CO2 uptake and catalytic activity for the cycloaddition of CO2 and epoxides under mild conditions. This work demonstrates the rational design and construction of RE-PMOFs with novel topologies through ligand functionalization, providing insights into tailored PMOFs for various applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Xingzhong Zhang, Yue Hou, Yang Yang, Ziyu Wang, Xiaosa Liang, Qingqing He, Yufeng Xu, Xiaolong Sun, Hongyu Ma, Jing Liang, Yong Liu, Wei Wu, Hongyu Yu, Haizhong Guo, Rui Xiong
Summary: In this study, a high-performance paper-based TE device was fabricated using simple screen-printing technology, which can be used for power generation and display. The findings offer potential applications in energy harvesting devices, optical encryption, anti-counterfeiting, and dynamic infrared display.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Youfusheng Wu, Xiao Chen, Wei Wu
Summary: Optical information encryption and safety are important for data protection and information safety. The development of multiple stimuli-response optical materials, such as carbon dots (CDs), is crucial for practical applications. This review focuses on the polychromatic emission of CDs and their role in high-capacity information encryption and safety strategies.
Article
Optics
Youfusheng Wu, Xiao Chen, Panwang Guo, Enbo Xue, Bin Tian, Ke Zheng, Jing Liang, Wei Wu
Summary: Polychromic up/down-conversion emissions in carbon dots (CDs) system have significant potential for advanced information encryption and security. However, achieving tunable emissions in CDs system has been challenging due to difficulties in preparing red down-conversion emission and the poor absorption of CDs. This study successfully obtains red fluorescence and room-temperature phosphorescence by establishing energy transfer processes, and achieves color-tunable upconversion luminescence through in situ preparation of rare-earth co-doped nanoparticles. The results demonstrate the possibility of using multicolor emissions for information encryption and security technologies.
JOURNAL OF LUMINESCENCE
(2023)
Article
Biotechnology & Applied Microbiology
Liwen Zhang, Jingjing Yang, Bingdang Wu, Junjun Liu, Xiaoyi Xu, Wei Wu, Jinlong Zhuang, Hanxiang Li, Tianyin Huang
Summary: This study compared the effects of alkali, ultrasound, and the synergistic effect of ultrasound and alkali on microalgae disruption and investigated the synergistic disruption mechanism. Quantitative analysis showed that under optimized conditions, the release of protein by the synergistic method was significantly higher than that of alkali and ultrasound alone. Furthermore, the study found that nutrient release mainly occurred during the microalgal bloom dispersion and individual microalgal micro-fragmentation phases.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Chemistry, Physical
Qun Liu, Jing Liang, Bin Tian, Enbo Xue, Xinyu Zhang, Panwang Guo, Ke Zheng, Guilin Tang, Wei Wu
Summary: Harvesting electricity through water evaporation is renewable and environmentally friendly, but current generators have limited power supply. This study presents a high-performance textile-based evaporation-driven electricity generator using continuous gradient chemical reduced graphene oxide (CG-rGO@TEEG). The CG-rGO@TEEG can generate a voltage of 0.44 V and a current of 590.1 mu A with an optimized power density of 0.55 mW cm(-3) when NaCl solution is applied. This work provides a novel approach for efficient clean energy harvesting based on water evaporation.
Article
Materials Science, Multidisciplinary
Enbo Xue, Bin Tian, Youfusheng Wu, Qun Liu, Panwang Guo, Ke Zheng, Jing Liang, Wei Wu
Summary: This article introduces a soft actuator that has both self-sensing and actuation characteristics, which can better adapt to the environment and effectively realize intelligent human-machine interactions. The sensing function is integrated into the soft actuator using screen printing technology. By exploiting the photothermal conversion performance of a dopamine-modified graphene oxide layer and the difference in expansion coefficient between the graphene oxide layer and the poly(vinylidene fluoride)/polydimethylsiloxane layer, the soft actuators exhibit different actuation behaviors under photothermal and humidity stimuli. Additionally, a printed carbon black/highly elastic transparent adhesive cement sensing layer is introduced to provide real-time feedback on the actuation process. Various complex deformations can be achieved by assembling multiple actuators. Finally, the soft actuator is demonstrated to be applicable as a smart packaging material. We believe that actuators with sensing feedback are of significant importance in soft robotics and smart packaging.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Panwang Guo, Bin Tian, Jing Liang, Xiuping Yang, Guilin Tang, Quancai Li, Qun Liu, Ke Zheng, Xiong Chen, Wei Wu
Summary: High-performance flexible resistive-type humidity sensors are fabricated by screen-printing method using hexagonal tungsten oxide as the humidity-sensing material. These sensors exhibit high sensitivity, good repeatability, outstanding flexibility, low hysteresis, and fast response in a wide relative humidity range. They have immense potential in various applications including wearable devices, non-contact measurements, and packaging opening state monitoring.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Guilin Tang, Xinyu Zhang, Bin Tian, Panwang Guo, Jing Liang, Wei Wu
Summary: High-performance electrode materials play a crucial role in the practical application of energy storage devices. The design of nanostructure and heterostructure is an effective approach to achieve high-performance electrode materials. In this study, a high-performance printed hybrid supercapacitor is developed by utilizing a nanostructured CuSe@MnSe composite. The CuSe@MnSe composite exhibits high capacity (635.32 C g-1) and exceptional stability (over 7000 cycles with 91.62% capacity retention). The printed flexible hybrid supercapacitor demonstrates high capacitance (164.9 mF cm-2), outstanding energy density (58 μWh cm-2) (19.54 Wh kg-1), power density (0.8 mW cm-2) (266 W kg-1), and excellent bending resistance (93% capacitance retention after repeated bending 1000 times). Effective electrode design shows great potential for printed energy storage devices in wearable electronics, providing inspiration and synthesis strategies for future material development.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Chemistry, Physical
Xiaoyu Xiong, Jing Liang, Wei Wu
Summary: Nowadays, flexible sensors, especially flexible pressure sensors, are widely used in wearable electronics to monitor human motion and health. Triboelectric pressure sensors (TPSs) provide a powerful approach for wearable healthcare due to their lightweight, easy manufacture, high sensitivity, and self-powered properties. This review introduces the sensing mechanisms, structure modes, electrode materials, fabrication techniques, surface microstructure strategies, applications, and future research directions of TPSs, providing a comprehensive review and promising direction for self-powered wearable devices in human motion monitoring, health monitoring, and human-machine interaction.
Article
Chemistry, Organic
Zheng Fang, Biqiong Hong, Wei Wu, Zhiqiang Weng
Summary: We report a metal-free amination reaction using 1-(3,3,3-trifluoro-2-oxopropyl)pyridin-1-ium bromide and alpha,beta-unsaturated carbonyl compounds with NH4OAc or amines. The reaction yields a series of 3-trifluoromethyl aniline derivatives as major products. The reaction proceeds through a cascade process involving 1,4-Michael addition and intramolecular addition to form a dienone intermediate.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Review
Chemistry, Multidisciplinary
Quancai Li, Bin Tian, Jing Liang, Wei Wu
Summary: Due to their biocompatibility and easy regulation, hydrogel-based flexible sensors have seen significant development in wearable electronics, electronic skin, and soft robotics. The properties of functional materials greatly impact the performance of conductive hydrogel-based sensors. This review focuses on the preparation strategies and general methods of functional conductive hydrogels for flexible sensors, including improvement of electrical conductivity and mechanical properties. The addition of extra functions, such as self-healing properties, anti-swelling properties, anti-freezing properties, and self-adhesion properties, are crucial for maintaining excellent performance in complex or harsh application conditions. The applications, prospects, and challenges of functional conductive hydrogels in flexible sensors are discussed in detail.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Chemical
Wei Wu, Jianhua Ge, Baiqing Xiao, Zhou Wei, Wan Zhang, Xuyang Zheng
Summary: Bi2WO6 with enhanced photocatalytic degradation performance was synthesized by O-3 etching method, which resulted in abundant oxygen vacancies and improved photocatalytic activity. The modified Bi2WO6 exhibited a 2.1 times higher degradation efficiency of benzidine wastewater compared to pure Bi2WO6 under xenon lamp irradiation. Furthermore, the modified Bi2WO6 showed good durability with no significant decrease in photocatalytic activity after four cycles.
DESALINATION AND WATER TREATMENT
(2023)
Article
Chemistry, Multidisciplinary
Fei Guo, Zeyi Zhang, Runzhe Chen, Yangyang Tan, Wei Wu, Zichen Wang, Tang Zeng, Wangbin Zhu, Caoxin Lin, Niancai Cheng
Summary: Pt-based nanoclusters were modified with sub-nanometer NiO to optimize the adsorption/desorption strength of hydrogen intermediates, resulting in enhanced hydrogen evolution performance. The Pt/NiO nanoclusters were confined in the pores of N-doped carbon, achieving high stability and activity. The NiO nanoclusters accelerated the Volmer-step kinetics, leading to a significant improvement in the overall performance.
MATERIALS HORIZONS
(2023)
Review
Chemistry, Multidisciplinary
Guilin Tang, Jing Liang, Wei Wu
Summary: This review summarizes the recent advancements in electrode materials based on transition metal selenides for supercapacitor applications. Various material modification strategies and the progress of multifunctional supercapacitors are discussed.
ADVANCED FUNCTIONAL MATERIALS
(2023)
