Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 11
·3805-3811
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IF 6.4
Zaichun Sun,Yihao Wang,Bingchu Mei
Bismuth oxyhalides have attracted much attention in the field of optoelectronics because of their highly anisotropic crystal structure, tunable optical properties, and low toxicity. Few studies on the epitaxial growth of bismuth oxyhalides have been reported so far, however epitaxial thin films are suitable for investigating intrinsic properties and achieving device construction. In this study, we achieved the high quality epitaxial growth of BiOI thin film with thickness on the nanometer scale controllable via the deposition time. The bandgap of the BiOI exhibited a negative corelation with the film thickness owing to the quantum confinement effect. The as-fabricated photodetector based on the optimized thickness of the BiOI film exhibited high optoelectrical performance with a responsivity of 43.5 mA W−1 and normalized detectivity of 8.7 × 1010 Jones under the illumination of 405 nm laser. Furthermore, the photoresponse mechanism of the BiOI photodetector was tuned from a photoconduction to photogating effect depending on the thickness of the epitaxial thin film. The high crystallinity and continuous surface morphology contribute to the generation of the photogating effect of the BiOI film. This study enriches the investigation of bismuth oxyhalides and paves the way towards the design of efficient bismuth-based semiconductor optoelectronic devices.
研究领域:
材料科学
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光电材料
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半导体物理
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Luyang Sun,Zelin Liu,Zhiguo Lv,Yu Ding,Jiawen Sun,Chuanhui Gao
Corrosion of metal materials has become a major challenge for marine facilities. Traditional anti-corrosion coatings cannot detect local corrosion in time, leading to significant maintenance costs. Therefore, providing an intelligent response performance to traditional anticorrosive coatings is essential. This study proposes an intelligent epoxy anticorrosion system based on the dual-mode response mechanism of visual color development and fluorescence quenching. The molecular structure was designed with the combination of 1,10-phenanthroline-5-amine (APhen) and E44 epoxy resin through a simple ring-opening reaction to obtain modified epoxy resin (EAPhen). The intelligent responsiveness of the epoxy resin was achieved through a simple and efficient complexation reaction. Subsequently, under the curing crosslinking of polyether amine D400, an epoxy resin anticorrosive coating (EAD-x) with excellent mechanical properties and visual response to corrosion products (Fe 2+ ) was prepared. Furthermore, the high crosslinking density and dense three-dimensional network structure provided EAD-4 coating with good physical barrier properties. Additionally, APhen and local corrosion product Fe 2+ were able to form a passivation layer protective film after a complexing reaction. The synergistic effect of these mechanisms gave the epoxy resin excellent corrosion resistance. After 7 days of immersion in 3.5 wt% NaCl solution, the |Z| 0.01 Hz value of the EAD-4 coating remained as high as 2.56 × 10 11 Ω•cm 2 . Moreover, due to the “pinning” effect of E44, the adhesion level of EAD-4 coating to the substrate reached 5 B. In conclusion, this study provides a concept for realizing the visual self-warning function of local corrosion which is expected to offer a more reliable and efficient anti-corrosion protection scheme for marine engineering facilities while promoting sustainable development in this field.
研究领域:
材料科学
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腐蚀与防护
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海洋工程
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产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 3
·1812-1820
·
IF 11.806
Zhang Dianbo,Zhang Minyue,Wang Jingwen,Sun Hongling,Liu Hu,Mi Liwei,Liu Chuntai,Shen Changyu
As a promising candidate for flexible epidermal strain sensor, the obvious resistance sensing signal drift of ionic conductive hydrogel affects its practical application significantly, and the AC impedance analysis appears to be an effective test method. Here, the rarely reported impedance sensing mechanism was investigated based on an axon-like ionic conductive hydrogel strain sensor, which is composed of cellulose hydrogel particles (CHPs) as the core sensing medium, rubber tube as the elastic cortex, and stainless steel as the electrode. Specifically, the prepared hydrogel strain sensor exhibited a negative ion concentration-dependent impedance sensing behavior, the impedance variation (△ Z / Z 0 ) and sensitivity (GF) at 400% reach 441.5 and 630.1, respectively. What is more, the AC impedance sensing behavior of the hydrogel sensor displayed good strain amplitude identifiability in a wide strain range up to 400%, ultralow detection limit (0.1% strain), excellent rate independence, and outstanding long-term fatigue resistance. Importantly, an equivalent circuit model was built, and the variation of ion transport impedance and electric double-layer capacitance at the electrode-CHPs interface during the tension process were verified to be the internal sensing mechanism. What is more, the special skin–core structure can effectively solve the dehydration problem and poor mechanical property of hydrogel, and the amounts of interfaces between adjacent CHPs are also beneficial for improving the impedance responsivity. We believe the proposed impedance response mechanism will undoubtedly provide important guidance for the design of high-performance ionic conductive hydrogel strain sensor. Graphical abstract An equivalent circuit model was proposed for explaining the impedance response mechanism of axon-like skin core–structured hydrogel strain sensor.
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
TALANTA
·
2024
·
IF 5.6
Xinyue Jiang,Yuqun Xie,Fan Dong,Defu Liu
Response mechanism of the electrode is elucidated in terms of (hydrogen) phosphate accelerating oxidation of Co II to Co III for the first time. Cyclic voltammetric techniques in conjunction with XRD, XPS and Raman characterizations have demonstrated unambiguously the response of cobalt (II) hydroxide electrode involves a phosphate and hydrogen ion dependent charge transfer process. Phosphate ions induce Co(OH) 2 transformed into CoOOH within interlayer adsorption and restored the initial state after reduction. Meanwhile, the in common structural between Co(OH) 2 and CoOOH prevents extensive structural convertibility upon cycling, result in the advantage of reversibility in phase transformation. Demonstrated sustainable technique offered the determination of phosphate with robust reproducibility (1000 cycles), long storage stability (6 months) and selectivity (potential interference: Cl − , NO 3 − , SO 4 2− and HCO 3 − ), achieving a detection limit of 5 × 10 −8 M over a wide linear range up to 1.28 mM. Presented work provided insights into the unique selectivity towards phosphate in cobalt based sensors, which may inspire the rational design of Co(OH) 2 -based electrodes with superior electrochemical performance or extended applications.
研究领域:
分析化学
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Longqi Yao,Zhihua Zhao,Chen Chen,Zhigang Shao,Lan Wu
Amine-based gases have become an important indicator for detecting the decay of seafood, especially during the transportation and storage process. Triethylamine (TEA) is continuously produced as a result of slow decay, therefore, detecting the release of TEA from the food spoilage to indirectly measure the freshness of seafood has become a crucial method. However, the current TEA sensors frequently encounter issues such as low sensitivity, poor selectivity, or the necessity for higher operating temperatures, all of which hinder their practical application in seafood quality detection. In our work, for the first time, the gas-sensitive response of Bi 2 S 3 to TEA at room temperature (25 ℃) was improved by the composite of ZnO nanoparticles. The response to 100 ppm TEA is 2.51, which is 3.7 times that of pure Bi 2 S 3. The response/recovery time is 49/270 s. The materials structure and composition were studied by the methods like XRD, SEM, XPS, FTIR, and TEM, and the surface area of the nanocomposites was 24.6 m 2 /g, which could provide more adsorption sites. Then a response mechanism was proposed based on those characterization results. Meanwhile, the experimental verification shows that the sensor have excellent selectivity, repeatability and stability. Finally, a TEA detection equipment was designed to effectively detect the TEA produced by decayed marine fish. This work reports the first example of fabrication Bi 2 S 3 /ZnO Nanocomposites for TEA Gas Sensors at room temperature, and thus it’s also the first report about the application of Bi 2 S 3 /ZnO gas sensor for food safety. The gathered results reveal great prospects of TEA gas sensors for the food quality monitoring during transportation and storage.
研究领域:
材料科学
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食品科学
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传感器技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2019
·
IF 3.131
Shuo Lu,Dongjie Yang,Miao Wang,Mengzhen Yan,Yong Qian,Dafeng Zheng,Xueqing Qiu
The pH-responsive O/W Pickering emulsions were stabilized by amphoteric lignin (AML) absorbed with SiO 2 nanoparticles via electrostatic interaction. AML was gained by quaternary ammonium modification of alkali lignin, and its structure was characterized by 1 H NMR. Fourier transform infrared spectroscopies and Zeta potential measurements were performed to investigate the interaction between AML and SiO 2 . The formed AML@SiO 2 compounds were utilized to prepare Pickering emulsions. The influences of AML concentration and pH on emulsions were studied by rheological measurements and Turbiscan Lab Expert stability index system. The pH-responsive mechanism of Pickering emulsions was investigated by Zeta potential, quartz crystal microbalance with dissipation, atomic force microscopy and three-phase contact angle. The results indicated that at the pH range of 3-4, AML was absorbed on SiO 2 to realize the in-situ hydrophobization of SiO 2 , forming stable Pickering emulsions. When pH was above 4, only a little amount of AML was absorbed on SiO 2 due to the strong electrostatic repulsion between them, resulting in unstable emulsions. The emulsions could be cycled at least 5 times between emulsification and demulsification as well as exhibited excellent salt tolerance.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Cheng Liu,Nan Lv,Jiyuan Feng,Shirui Zhang,Jiejing Yang,Andong Zhao,Yuteng Zhang,Haifeng Zhang
Current moisture power generation technology faces several limitations, including its dependence on humidity gradients caused by adsorption differences, structural complexities, and the requirement for thick humidity-sensitive layers. These constraints hinder its widespread use in passive humidity sensors. Here, we introduce an innovative approach to humidity sensing technology by utilizing nanoresistance network-based built-in electric field drive strategy. The polyvinyl pyrrolidone/polyaniline nanofiber membrane (PPNFM), fabricated as a nanoresistance network material model, serves as the sensing layer that adsorbs water molecules and acts as charge carriers after dissociation. Moreover, the PPNFM generates a built-in electric field through the potential difference created by connecting to two electrodes. This built-in electric field drives the directional movement of dissociated positive and negative ions within the PPNFM, producing a voltage in response to humidity. The potential of PPNFM and its humidity response mechanism are systematically investigated and evaluated. Furthermore, the humidity sensing performance of the sensor can be optimized by adjusting the composition and size of the PPNFM. This approach eliminates the requirement for specific structures, streamlining the fabrication process and paving the way for the development of flexible, ultra-thin, and passive humidity sensors.
研究领域:
材料科学
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传感器技术
·
柔性电子
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 60
·37744-37751
·
IF 3.361
Yi He,Jiayu Guo,Xiazhen Yang,Bing Guo,Hangyan Shen
Ambient humidity plays an important role in the fields of industrial and agricultural production, food and drug storage, climate monitoring, and maintenance of precision instruments. To sense and control humidity, humidity-responsive actuators that mimick humidity responsive behavior existing in nature, have attracted intense attention. The most common and important class of humidity actuators is active bilayer structures. However, such bilayer structures generally show weak interfacial adhesion, tending to delaminate during frequent bending and restoration cycles. In this work, to address this problem, a novel monolayer humidity-driven actuator with no adhesive issue is developed by integrating the swellable metal–organic frameworks (MIL-88A) into thermoplastic polyurethane films. The proposed actuators display excellent humidity response that under the conditions of relative humidity simulated with saturated salt solution, the MIL-88A/polyurethane composite films show good self-folding response and stability for recycling use. In addition, a deep insight into the self-folding of the composite films is also provided and a new response mechanism is proposed. In this case, the results show that both the preparation method and response properties of the humidity actuators are improved. Therefore, it suggests a new promising way to develop and design flexible humidity actuators.
研究领域:
材料科学
·
机械工程
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Qingguang Bao,Danhui Wang,Ning Wang,Xuemei Yan,Qingfeng Sun,Jingyao Feng,Shan Cheng,Zhenghui Liu,Nan Li,Xigao Jian
Micro-nano coupled self-lubricating capsules with a double-layer core-shell structure (PI@OIL-F/HMCS) were developed to enhance the tribological performance of PPEK composites. The capsules exhibit excellent thermal stability, reducing the friction coefficient and wear rate by 88.14 % and 94.79 % at room temperature. At 300 °C, the composite maintains a low friction coefficient (0.05) and a wear rate of 9.6 × 10⁻¹ ⁶ m³ /(N·m). A solid-liquid synergy and two-stage response mechanism ensures continuous lubrication and film integrity under high temperature and load. This work offers a new strategy for designing heat-resistant self-lubricating materials and advances the development of high-performance polymer composites.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Dongyang Liu,Wenfeng Yang,Yuanfei Lv,Shuangxi Li,Mingxiang Qv,Dian Dai,Liandong Zhu
With the continuous increase of e-waste, more and more pollutants such as tetrabromobisphenol A (TBBPA) and bivalent cadmium ions (Cd(Ⅱ)) are often detected in the surface water. However, their combined toxicity to microalgae is still unclear. Therefore, this study comprehensively explored effects of TBBPA and Cd(Ⅱ) on freshwater microalgae Chlorella sorokiniana , in terms of growth, photosynthetic activity, biochemical characteristics and molecular level. Results showed that Cd(Ⅱ) below 1 mg/L could promote the growth of microalgae, while TBBPA with various dosages showed inhibitory effects. The coexistence of TBBPA and Cd(Ⅱ) had a significant effect on photosynthetic activity, enzyme activity and chlorophylls content. Simultaneously, the release of dissolved organic matters reduced the damage of pollutants to algae. Moreover, C. sorokiniana had a good removal effect on Cd(Ⅱ), and the removal efficiency could reach 72.83%. Interestingly, addition of Cd(Ⅱ) could enhance the removal effect of C. sorokiniana on TBBPA, and the highest removal reached 44.16%. Transcriptome analysis showed that C. sorokiniana had different responses to Cd(Ⅱ) and TBBPA stress, while both caused the regulation of protein synthesis-related genes. Additionally, exposure to Cd(II) upregulated DNA replication-related genes in microalgae, thereby promoting cell proliferation. This study provides insights into toxic mechanisms of TBBPA and Cd(Ⅱ) to microalgae together with their removal patterns, which offers a theoretical basis for further assessment of the actual risk of Cd(II) and TBBPA to aquatic organisms.
研究领域:
环境科学
·
生态毒理学
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分子生物学
·
水生生态学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xingmei Wang,Yibo Sun,Fan Liu,Rongda Zhang,Tianyu Wang,Fei Jia,Guanghui Gao
Hydrogels served as core materials for wearable sensors in recent years, yet their practical application was constrained by water-loss-induced instability, suboptimal mechanical properties, and insufficient functionality in complex scenarios. To overcome these challenges, this study innovatively engineered a Janus fiber scaffold-based composite hydrogel biomimetic skin with a triple humidity-responsive mechanism, achieving substantial breakthroughs in performance optimization and multifunctional integration. HSBS leveraged triple humidity response mechanisms: chitosan-gelatin buffering, Janus scaffolds' unidirectional conduction, and LiCl deliquescence, achieving high hygroscopic sensitivity across 30–90 % RH. Concurrently, the HSBS exhibited wide temperature adaptability from −20 °C to 50 °C, exceptional strain-sensing stability, and mechanical durability, with a water retention rate of 76 % at room temperature and a tensile strength of 3.09 MPa. It could also precisely detect variations in skin temperature and humidity, as well as fluctuations in physiological signals. Endowed with a triple humidity-responsive mechanism as its core advantage, this novel biomimetic skin was poised to significantly expand the application frontier of wearable sensors in domains such as healthcare monitoring and sports science.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
·
可穿戴电子
·
水凝胶应用
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）