Article
Chemistry, Physical
Manoj Mayaji Ovhal, Hock Beng Lee, Shahd Boud, Keum-Jin Ko, Won-Yong Jin, Neetesh Kumar, Barkha Tyagi, Jae-Wook Kang
Summary: The advancement in stripe/fiber-shaped optoelectronic devices fabrication has boosted the performance of smart textile electronics. ITO-free flexible transparent conductive electrodes (TCEs) are highly desirable for high-performance smart textile electronics. In this study, large-area PEDOT:PSS/Ag-fibers hybrid TCEs (DIW-TCEs) were developed using spin-coating and three-dimensional direct-ink writing (3D-DIW) techniques for flexible organic solar cells (OSCs). The DIW-TCEs exhibited excellent electrical conductivity, optical transmittance, and mechanical flexibility. Stripe-OSCs based on DIW-TCEs achieved high power conversion efficiency. A flexible power module constructed using stripe-OSCs successfully lit up a commercial LED. The DIW-TCEs can serve as an ITO-free alternative for smart textile electronics production.
MATERIALS TODAY ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Sehyun Park, Seunghyeb Ban, Nathan Zavanelli, Andrew E. Bunn, Shinjae Kwon, Hyo-ryoung Lim, Woon-Hong Yeo, Jong-Hoon Kim
Summary: Recent advances in soft materials and nano-microfabrication have made it possible to develop flexible wearable electronics. Printing technologies have shown efficiency and compatibility with polymeric materials for manufacturing wearable electronics. In this study, fully screen-printable, skin-conformal electrodes were presented for low-cost and scalable manufacturing of wearable electronics. The screen printing process enables easy, cost-effective, and high-throughput manufacturing, while the ink used for the conductive layer printing allows for natural deformation under stretching and bending conditions. Real-time wireless electrocardiogram monitoring was successfully demonstrated using the printed electrodes, with an algorithm developed for accurate heart rate and respiratory rate calculations, as well as arrhythmia detection.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Dimitris Barmpakos, Vassiliki Belessi, Nikolaos Xanthopoulos, Christoforos A. Krontiras, Grigoris Kaltsas
Summary: This study evaluates the thermoelectrical response of two graphitic materials and demonstrates their potential as microheaters. Utilizing inkjet printing technology allows for efficient production of microheaters with high repeatability and endurance in heat cycles. This is significant for achieving cost-effective production and minimizing material waste.
Article
Polymer Science
Huating Tu, Xiaoou Li, Xiangde Lin, Chenhong Lang, Yang Gao
Summary: This study demonstrates a dry electrode for ECG monitoring made by screen printing conductive ink on ordinary polyester fabric. The screen-printed textile electrodes exhibit good electrical and electrochemical properties and excellent ECG signal acquisition performance. Furthermore, they maintain flexibility and durability even after repeated bending and washing cycles, providing favorable support for the design of flexible and wearable electrophysiological sensing platforms.
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
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
Chemistry, Physical
Zhi Liu, Hongtao Zhou, Fan Zeng, Leihang Hu, Xueli Wu, Xianyin Song, Changzhong Jiang, Xingang Zhang
Summary: By adjusting the ratio of nickel and cobalt, researchers have successfully synthesized porous nanoflower-like nickel/cobalt-layered double hydroxides (LDH) with high specific capacitance and excellent rate performance. When combined with graphene and activated carbon, a flexible asymmetric supercapacitor (ASC) with outstanding electrochemical performance and flexibility was fabricated.
ACS APPLIED ENERGY MATERIALS
(2022)
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
Electrochemistry
Hua Guo, Zhen Jiang, Dayong Ren, Shengxia Li, Jialin Wang, Xiaobing Cai, Dongxing Zhang, Qiuquan Guo, Junfeng Xiao, Jun Yang
Summary: The study introduces a simple method for fabricating flexible micro-supercapacitors on textiles, which exhibit significantly enhanced electrochemical performance and elongated cycle life through a multi-step printing strategy, suitable for wearable electronic systems.
Article
Materials Science, Multidisciplinary
Lijun Ma, Tiancheng Xia, Rui Yu, Xiao Lei, Jun Yuan, Xiaotian Li, Gary J. Cheng, Feng Liu
Summary: A highly sensitive, stable, and flexible piezoresistive sensor is developed by combining 3D printing with a carbon nanotubes (CNTs) surface-filled structure. Experimental results show that the sensor has high stretchability, sensitivity, gauge factor, stability, short response and recovery time, and obvious response to temperature. It also shows great potential for detecting human activities and application in wearable electronics.
ADVANCED ENGINEERING MATERIALS
(2021)
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, 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
Chemistry, Physical
Xinran Zhou, Kaushik Parida, Jian Chen, Jiaqing Xiong, Zihao Zhou, Feng Jiang, Yangyang Xin, Shlomo Magdassi, Pooi See Lee
Summary: The fast development of wearable electronic systems requires a sustainable energy source. Piezoelectric polymer films are a perfect candidate for fabricating nanogenerators, but most of their applications are limited to the pressing mode energy harvesting. In this work, an auxetic structure is 3D printed on a polymer film-based PENG, enabling the bending deformation of the PENG to be transformed into controlled in-plane stretching deformation, increasing the bending output voltage by 8.3 times. The auxetic structure-assisted PENG is also demonstrated as a sensor for bending angle and motion monitoring.
ADVANCED ENERGY MATERIALS
(2023)
Article
Energy & Fuels
Xinyu Zhang, Yongfeng Pei, Bin Tian, Youfusheng Wu, Guilin Tang, Qun Liu, Jing Liang, Wei Wu
Summary: This study presents a simple hydrothermal method to synthesize rGO/Fe2O3 composite, which can be used as the active material in screen-printing functional inks. The functional inks show excellent dispersibility and printability in an EC-ethanol system. By over-printing, performance-controlled screen-printed electrodes were successfully fabricated. In addition, flexible supercapacitors (FSCs) with different printed layers were achieved using rGO/Fe2O3-based printed electrodes, exhibiting remarkable areal capacitances and significant energy densities. The flexibility and stability of the device were also demonstrated. The directly screen-printed integrated rGO/Fe2O3-based printed FSC array provides a stable energy supply and has promising application prospects in wearable energy storage.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Analytical
Rocio Silvestre, Raul Llinares Llopis, Laura Contat Rodrigo, Victor Serrano Martinez, Josue Ferri, Eduardo Garcia-Breijo
Summary: Flexible hybrid electronics combines flexible-printed substrates with conventional electronics, allowing for the integration of electronic devices on fabrics. This study focuses on optimizing the design parameters for screen-printed silver tracks on textiles and analyzing the soldering of surface mount devices on fabric substrates at low temperatures. The results demonstrate the feasibility of using fabrics for flexible hybrid electronics.
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)
