APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Yifan Tong,Minghao Fang,Chaoqi Liu,Xin Min
As technology continues to advance, multifunctional flexible electronic devices for monitoring human health and managing thermal conditions have garnered considerable attention. Nevertheless, achieving a balance between a wide strain sensing range and high sensitivity remains a considerable challenge. Herein, PDA/PEBA/MWCNTs/rGO (PPMr) sensors were fabricated by vacuum-assisted filtration of ultrasonically mixed multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (rGO) loaded on polydopamine-modified PEBA nanofiber membranes. This sensor has a broad range of strain detection capabilities (0–127 % strain), high sensitivity (GF = 42), response/recovery times of 600/500 ms, and over 8000 cycles of stability. At the same time, this sensor also exhibits outstanding photothermal conversion capability (reaching 75.6 °C at 100 mW/cm 2 ), electrothermal conversion capability (up to 82.2 °C at 8 V), and excellent photothermal/electrothermal synergistic conversion capability (reaching 78.9 °C at 100 mW/cm 2 and 4 V). This strain sensor is noteworthy for its outstanding performance, as it can detect body movements across a wide range of strain, such as elbow joint movements, as well as subtle physiological signals like pulse waves. This capability highlights its significant potential for applications in human health monitoring and thermal management.
研究领域:
材料科学
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生物医学工程
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
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2023
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IF 4
Jingyan Tian,Leilei Zhang,Junnan Li,Lian Ma,Jianhao Wang,Zebin Chen,Yuping Wu,Qianting Wang,Xiaoyun Ye
With the development of radar stealth technology and electronic communication technology, electromagnetic (EM) wave absorbing materials with lightweight and broad absorbing bandwidth are widely expected. In this study, the multi-walled carbon nanotubes (MWCNTs)/reduced graphene oxide (rGO)/polypyrrole (PPy) ternary composites were prepared by in-situ polymerization under hydrothermal conditions. The effects of carbon substrate of MWCNTs/rGO and the content of PPy on the microwave absorption (MWA) properties of the ternary composites and the corresponding attenuation mechanism were investigated. The results showed that MWCNTs and rGO nanosheets interweave together to form a relatively uniform micro-network structure with even wrapping of PPy on the surface of MWCNTs/rGO substrate. The adjustable amount of PPy optimizes the impedance matching and EM wave attenuation capacity. The composites achieve effective absorption bandwidth (EAB) of 4.6 GHz at 2.1 mm, and the minimum reflection loss (RL min ) value of −57 dB at 15.8 GHz. The multi-void network structures formed by MWCNTs and lamellar rGO and the interfacial polarization between MWCNTs/rGO composite carbon substrate and PPy can effectively decay EM wave absorption, thus improving the MWA performance of the composites. This work provides an effective reference for the application of multi-component carbon composites in the field of microwave absorption.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Electrochemical Science
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2025
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IF 2.4
Gaosheng Nie,Xiongfei Sun,Liyin Xu,Ke Wu,Zilong Wei,Shuwu Liu
MOF-derived cobalt oxides (CoO x ) have attracted extensive attentions due to their excellent theoretical specific capacitances, permanent porosity and controllable structures. However, the inherent poor conductivity of single-component cobalt oxide, and the structural collapse, pore loss and agglomeration during pyrolysis process are still the main factors to limit the performance of CoO x . Structure design of 3D hierarchical porous heterostructure composites through 0D/1D/2D materials is an effective strategy for boosting the capacitive performance of CoO x . Herein, the rationally designed 3D hierarchically porous CoO x /MWCNTs/rGO ternary hybrid composite was constructed through high-temperature pyrolysis of a facile self-assembled 0D/1D/2D Co-MOF/MWCNTs/GO precursor. Indeed, The CoO x /MWCNTs/rGO electrode exhibited an excellent specific capacitance of 520 F g −1 at 0.5 A g −1 , outstanding rate capability of 80.77 % capacitance retention even at 20 A g −1 , and ideal durability with about 8.4 % capacitance decay after 10000 cycles. Moreover, the CoO x /MWCNTs/rGO exhibited a maximum energy density of 14.6 Wh kg −1 with a power density of 41.2 W kg −1 .
研究领域:
材料科学
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能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2025
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IF 3.5
Guoxin Ding,Xiangxiang Chen,Yuexiang Hu,Yan Liu,Jun Liu,Guojun Cheng
The design of the material structure significantly influences microwave absorption properties. Enhancing electromagnetic performance requires the creation of diverse and heterogeneous interfaces to promote extensive wave reflections. This study developed 3D composites with point (NiFe-LDH), line (multi-walled carbon nanotubes, MWCNTs), and surface (reduced graphene oxide, RGO) architectures using ultrasonic stirring and a hydrothermal process, aiming to achieve improved electromagnetic properties. At a Ni:Fe ratio of 3:1, MWCNTs are interspersed within the layers of reduced RGO, forming a distinctive three-dimensional network structure. Additionally, on the MWCNTs/RGO composite's surface, NiFe-LDH flakes grow uniformly. The resulting composite exhibits an effective absorption bandwidth (EAB) of 5.2 GHz and a minimum reflection loss (RL min ) of −57.93 dB at a thickness of 1.64 mm. Furthermore, a thickness of 1.70 mm achieves a maximum EAB of 6.88 GHz. These results demonstrate that the MWCNTs/RGO/NiFe-LDH composite provides a broad microwave absorption bandwidth and high absorption efficiency, making it a promising candidate for developing advanced materials for microwave absorption applications.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
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2025
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IF 5.1
Hao Li,Qi Zhao,Yu-Qi Ge,Zhencheng Chen,Guo-Cheng Han,Xiao-Zhen Feng,Heinz-Bernhard Kraatz
Cholesterol (CHO) plays a vital role in fundamental cellular life activities, and high CHO levels in the human body can lead to atherosclerosis, making the development of CHO biosensors essential. We prepared a molecularly imprinted electrochemical sensor for non-enzymatic detection of cholesterol by depositing multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (rGO) for signal amplification on a glassy carbon electrode (GCE) and then modified with a phenol molecularly imprinted membrane (MIM) to develop a CHO enzyme-free detection platform (MIM/rGO/MWCNTs/GCE). The formation of the materials and MIM was characterized using techniques such as scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The sensor exhibited good performance in the linear range of 3.34–100.00 μM using differential pulse voltammetry (DPV), with a limit of detection (LOD) of 1.11 μM and a high sensitivity of 1.613 μA·μM −1 ·cm −2 . The sensor exhibits good reproducibility, stability, repeatability, and selectivity. The developed sensors were applied to detect human serum samples, yielding recoveries in the range of 99.4–100.4 % with a relative standard deviation (RSD) lower than 4.17 %, demonstrating the potential of the developed CHO electrochemical sensors for clinical detection.
研究领域:
分析化学
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生物传感器
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纳米材料
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电化学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
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