CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Changtong Zhou,Yong Qi,Shufen Zhang,Wenbin Niu,Suli Wu,Wei Ma,Bingtao Tang
The construction of novel photonic structures renders the possibility for creating stimuli-responsive functional materials. Herein, innovative water-response double-inverse opal (WRDIO) films with fast response time and brilliant structural color are first fabricated by introducing polystyrene microspheres into the inverse-opal backbone. The deprotonation of carboxyl groups generated by sodium carbonate treatment in the inverse-opal backbone inhibits the formation of hydrogen bonds among the polymer chains and the exposed carboxyl anions lead to hydrophilicity, which is conducive to the penetration of water into the internal pores. The response is achieved by inducing the polystyrene spheres within the pores from random distribution to the ordered assembly in the water environment, thus eliminating the scattering disturbance and developing bright structural color. Meanwhile, WRDIO film with a highly invisible pattern revealed by water stimuli is prepared. Furthermore, the content of carboxylic anions in the polymer affects the optical behavior and the increased osmotic pressure caused by high-proportioned carboxylic anions makes the WRDIO film swelled rapidly by water, whereas ethanol cannot. The broad-spectrum shifting (≈92 nm) depends on the composition of the ethanol-water mixture. Thus, the rapidly water-response and easy-to-use film materials with brilliant structural color exhibit potential applications in user-interactive anti-counterfeiting and sensors.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2022
·
IF 19.069
Peiru Zhou,Zhipeng Zheng,Binquan Wang,Yiping Guo
Hardness or brittleness limits the broad applications of currently available high-performance piezoelectric sensors in emerging fields like human-machine interface and wearable electronics , while existing technologies for fabricating flexible piezoelectric sensors often require high-temperature sintering or complex processes. Here, we reported flexible piezoelectric sensors based on 10 nm BaTiO 3 nanocubes self-assembled on glass fiber fabric (GFF). The simple self-assembly process avoids high temperature sintering process which can well maintain the mechanical performance of GFF. Owing to the superior piezoelectric performance of BaTiO 3 nanocubes and robust mechanical properties of GFF, the integrally fabricated flexible piezoelectric sensors achieved high sensitivity (101.09 nA kPa −1 and 3.31 V kPa −1 in the low pressure range of 0–10 N) and short response time (19 ms). The sensors can intelligently identify handwriting or recognize the user of keyboard, and the initially collected electrical signals are essentially the same as those after 3000 bending cycles. This work provides a novel self-assembly process to develop fabric-based flexible electronics, which promotes the development of self-powered piezoelectric sensors and creates advancements in human-machine interfaces.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Zifang Xu,Yong Fan,Yan Dai,Xuekai Wang,Shuangyue Hu
A fast response and stability enhanced electrochromic film based on a composite of polyaniline (PANI) with surface functionalized Lanthanum oxide (f-La 2 O 3 ) nanoparticles has been prepared by in-situ polymerization. Scanning electron microscopy (SEM) and Fourier infrared spectroscopy (FTIR) confirmed that La 2 O 3 was attached to the surface of PANI by silane coupling agent. Meanwhile, Electrochemical and electrochromic properties were investigated using cyclic volatammetry, chronoamperommetry, electrochemical impedance spectroscopy (EIS) and UV–vis spectroscopy. Compared with PANI, the f-La 2 O 3 /PANI composite showed excellent electrochromic performance, shorter response time and higher stability. As the mol ratio of La 2 O 3 to aniline was 1:3.5, the composites exhibited best electrochromic behavior with superior coloration efficiency of 22.81 cm 2 C −1 and fastest response time of 1.29 s/1.33 s for bleaching and coloration respectively. The result indicates that introduction of rare earth elements has great potential to improve the electrochromic properties of conducting polymers .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 11
·2599
·
IF 3.1
Xiao Liu,Xiangshun Geng,Guanhua Dun,Zeshu Wang,Jingbo Du,Dan Xie,Yi Yang,Tianling Ren
Recently, the combination of two-dimensional (2D) materials and perovskites has gained increasing attention in optoelectronic applications owing to their excellent optical and electrical characteristics. Here, we report a self-driven photodetector consisting of a monolayer graphene sheet and a centimeter-sized CH3NH3PbBr3single crystal, which was prepared using an optimized wet transfer method. The photodetector exhibits a short response time of 2/30 μs by virtue of its high-quality interface, which greatly enhances electron–hole pair separation in the heterostructure under illumination. In addition, a responsivity of ~0.9 mA/W and a detectivity over 1010Jones are attained at zero bias. This work inspires new methods for preparing large-scale high-quality perovskite/2D material heterostructures, and provides a new direction for the future enhancement of perovskite optoelectronics.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LIQUID CRYSTALS
·
2024
·
IF 2.4
Yuzhen Zhao,Yongle Wu,Xiangke Jiao,Ruijuan Yao,Zhun Guo,Jianjing Gao,Yang Zhao,Dong Wang
In this manuscript, the triple-layer PDLC device with progressive driving function was prepared by integrating three single-layer PDLCs with different electro-optical properties. In comparison with conventional single-layer PDLC, triple-layer PDLC is capable of achieving controllable transmittance by regulating the applied voltage under low-voltage conditions. The optimal ratio and polymerisation conditions were explored by introducing oleic acid modified CeO2 nanospheres and adjusting the polymerisation temperature as well as the UV light intensity. It was found that the polymer network morphology was affected by CeO2 nanospheres content, polymerisation temperature, and UV intensity, which led to changes in the electro-optical properties of the triple-layer PDLC. The samples obtained under the optimal ratio and process conditions exhibited a 77% acceleration in rise response time (ton) compared to the original conditions, while still maintaining excellent progressive driving performance. Its potential for application in the field of intelligent display windows has been significantly enhanced by these advantages.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yuying Chen,Huimin Wu,Fei Jin,Hong-Liang Ge,Feng Gao,Qiong Wu,Song Wang,Ying Wang,Hua Yang
In this work, a straightforward method for synthesizing fullerene derivatives with tentacle structures has been explored for monitoring environmental humidity, which involves introducing sulfonate onto the fullerenes. The structure and number of polar groups in three fullerene derivatives determined by a series of structural tests greatly affect their hydrophilicity and morphology, resulting in changes in humidity sensitive properties. In particular, the hysteresis and response time of the sensors display a great correlation with hydrophilicity. C 60 -Ho, the best performing derivative of this work, has exhibited high response values (∼3500 times), good linearity (R 2 = 97.3 %), and rapid response/recovery times (0.3/4.4 s), making it suitable for various applications such as non-contact detection of respiration, finger distance, and soil humidity.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-8
·
IF 14.919
Zheng Xiaoxiong,Jia Yining,Chen Aihua
Wearable ultraviolet (UV) detectors have attracted considerable interest in the military and civilian realms. However, semiconductor-based UV detectors are easily interfered by elongation due to the elastic modulus incompatibility between rigid semiconductors and polymer matrix. Polymer detectors containing UV responsive moieties seriously suffer from slow response time. Herein, a UV illuminance–mechanical stress–electric signal conversion has been proposed based on well-defined ionic liquid (IL)-containing liquid crystalline polymer (ILCP) and highly elastic polyurethane (TPU) composite fabrics, to achieve a robust UV monitoring and shielding device with a fast response time of 5 s. Due to the electrostatic interactions and hydrogen bonds between ILs and LC networks, the ILCP-based device can effectively prevent the exudation of ILs and maintain stable performance upon stretching, bending, washing and 1000 testing cycles upon 365 nm UV irradiation. This work provides a generalizable approach toward the development of full polymer-based wearable electronics and soft robots.
研究领域:
材料科学
·
光电传感
·
高分子化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Wei Liu,Ding Gu,Xiaogan Li
Detection of ultralow concentrations of the hazardous gases is the major demand and challenge for the development of biosensors. A novel mesoporous ZnSe-core/SnO 2 -shell microspheres based chemiresistive-type sensor was fabricated for ppb-level NO 2 detection, and the theoretical detection limit is calculated to be 0.87 ppb. The as-fabricated sensor presents an excellent performance for low-concentrations of NO 2 up to 2.4 ppm and exhibits significantly higher response approximately 6.94 than those of pristine SnO 2 (∼2.86) and ZnSe based sensors (almost no response) to 2.4 ppm NO 2 at 160 °C. The response and recovery time of the core-shell microspheres based sensor are 64 s and 52 s, respectively, which are substantially improved compared to those of the pristine SnO 2 based sensor (∼149 s and ∼133 s). The sensor demonstrates a superior long-term stability with a deviation in the response of the sensor less than 5 % for one month, and a brilliant selectivity to several possible interferents. The significantly improved sensing performance could be attributed to the obtained mesoporous structures and the formed ZnSe/SnO 2 hybrid interfaces. It yields more active sites and promotes the electrons transferred between ZnSe and SnO 2 nanocrystals. The density functional theory (DFT) calculations are employed to reveal the potential transducing mechanisms.
研究领域:
材料科学
·
环境科学
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 15
·2897-2904
·
IF 3.545
Beixi An,Yibing Luo,Jinglong Bai,Yanrong Wang,Xu Cheng,Jianpeng Li,Qiao Wang,Yifan Yang,Erqing Xie
In this study, we used a hydrothermal method to prepare WO3 nanospheres doped with a bimetal of Pd and Ni and used them in hydrogen sensing. The results show that the bimetal-doped WO3 nanospheres have a higher response, faster response/recovery time, and better selectivity than single metal-doped WO3. Moreover, they still have a high response to hydrogen at a low concentration. With 5 ppb of hydrogen, the sensor's response can reach 1.5, which is 1.5 times greater than that of pure WO3. Furthermore, the bimetal-doped WO3 has a shorter response time (14 s) and recovery time (8 s). This superior performance of the Pd/Ni-doped WO3 to hydrogen is most probably because of the strong adsorption of hydrogen, which results from the synergistic effect of two metals.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Juncai Song,Yuan Wei,Manzhang Xu,Jiuwei Gao,Lei Luo,Hao Wu,Xingji Li,Yue Li,Xuewen Wang
This work proposes a design, fabrication, and characterization of flexible temperature sensors using temperature-sensitive materials, which are applied using a drop coating method. Temperature-sensitive materials were fabricated by mixing poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) with polyaniline (PEDOT:PSS/PANI). The temperature coefficient of resistance reached −0.803%/°C. Moreover, the detection resolution reached 0.1 °C and had a fast response time of 200 ms. In addition, the sensor can sense spatial temperatures. The sensor has the advantages of low cost, a simple preparation process, and the potential to be used in medical rehabilitation and early disease prevention.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Aerzigu Xukeer,Jin Li
In this work, we synthesized the ternary nanocomposite of ZnO/TiO 2 /rGO and used as formaldehyde gas detection at room temperature (RT). The integration of rGO with the ZnO/TiO 2 heterostructure enhanced the composite’s responsiveness at RT. The presence of rGO enhanced conductivity, mechanical stability, and charge transfer, in addition to providing more active sites for CH 2 O molecule adsorption. Sensors based on ZnO/TiO 2 /rGO exhibited a response of 86 to 50 ppm formaldehyde, with response and recovery times significantly shortened to 11 s and 3 s, respectively. Additionally, the selectivity, stability, and repeatability of the sensors were also evaluated. Our method of sequentially combining ZnO with TiO 2 , followed by incorporating rGO to form a ternary heterostructure, effectively optimizes ZnO. This two-step approach addresses the limitations of slow desorption efficiency and low response associated with ZnO. We conducted first-principles computation to understand the sensing performance.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Yimeng Yang,Jiaqi Lou,Duo Qi,Chengji Zhao
The rapid development of wearable electronics is driving the exploration of flexible and transparent humidity sensors . However, the limited humidity response and mechanical flexibility of sensitive materials hinder the normal operation of the device. In this research, flexible humidity sensors with a fast response time (1 s) were prepared using transparent imidazolium-based hyperbranched poly(ionic liquid)s (HPIL). The sensor performance was improved by regulating the counter anions with different hydrophobicity , such as trifluoromethanesulfonimide ion (TFSI - ). The HPIL-TFSI sensor featured an improved response under low humidity condition (6%∼33% RH) with good linearity, excellent bending humidity response, mechanical stability , and long-term stability over a wide humidity range from 6% to 98% RH. Moreover, accurate sensing was achieved for respiratory monitoring, non-contact sensing, and detecting moisture on patched skin. The HPIL-TFSI sensor paves the way for the production of high-performance wearable sensor platforms.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）