JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
·
IF 9.9
Tianyi Hang,Chenhui Xu,Jiahui Shen,Jiajia Zheng,Lijie Zhou,Mengjia Li,Xiping Li,Shaohua Jiang,Pingan Yang,Wei Zhou,Yiming Chen
Nowadays, functional electronic devices with excellent flexibility and thermal management capability for effective electromagnetic wave absorption are urgently in demand. Herein, a novel and highly flexible silver nanowire (AgNW)/iron nanowire (FeNW) decorated melamine composite foam (AgFe-MF) was prepared via simple dip-coating process. Owing to optimal impedance matching, synergistic dielectric and magnetic losses as well as three-dimensional porous structure, the AgFe-MF with an ultra-low filler content (0.22 vol%) exhibited an outstanding minimum reflection loss of −69.61 dB, and the best effective absorption bandwidth ( EAB ) could reach up to 6.37 GHz. Importantly, the EAB of long-time working AgFe-MF was enhanced to 7.01 GHz after 1000 compress-release cycles under 40 % strain. Besides, it also featured considerate Joule heating capacity and achieved a saturation temperature of over 85.7 ℃ under 2.6 V voltage. The impressive thermal isolation and long-term stability ensured the safety used as portable heater. Therefore, this work will provide a vital slight for fabricating smart wearable electronic devices with integrated anti-electromagnetic radiation and personalized thermal management performances towards potential thermal and health threats.
研究领域:
材料科学
·
电子工程
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 14
·145601
·
IF 3.551
Rui Li,Xinyan Li,Ping-An Yang,Haibo Ruan
High-performance iron nanowires have attracted wide attention from researchers due to their 'controllable' arrangement distribution by magnetic fields. In this paper, a simple magnetic field assisted in situ reduction method was proposed to synthesize Fe NWs with high aspect ratio, small-diameter, and good dispersion. A detailed parametric study determining the relationship among the final morphologies of the products and magnetic field, injection sequence of sodium borohydride that was injected into ferrous sulfate heptahydrate, reactant concentration, and injection rate is presented. The as-synthesized Fe NWs were analyzed by scanning electron microscopy, transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy and vibrating sample magnetometry. A plausible mechanism for the formation of high-aspect-ratio Fe NWs is proposed. The SEM images showed the dependence of the NWs morphology and aspect ratio on synthesis parameters. Magnetic field and injection sequence showed considerable influences on the synthesis of high-aspect-ratio Fe NWs. In the absence of magnetic field or with the changes in injection sequence, only the Fe flakes were obtained. The NWs diameter decreased, and the aspect ratio increased with the increase in injection rate. The FeSO4·7H2O and NaBH4 concentration considerably influenced the aspect ratio of the product, which increased first, decreased, and then increased again with the increase in FeSO4·7H2O concentration. Meanwhile, the product aspect ratio increased and then became saturated with the increase in NaBH4 concentration Thus, an optimum synthesis process was obtained, with the average aspect ratio of 350, and the average diameter of 60 nm. The results reported in this paper provide a basis for optimizing the growth of Fe NWs by magnetic field-assisted method.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 39
·395708
·
IF 3.551
Ping-an Yang,Haibo Ruan,Yang Sun,Rui Li,Yi Lu,Chenye Xiang
Reducing the filling content of high-density ferromagnetic particles is a key prerequisite for obtaining lightweight absorbers. To this end, large iron nanowires (Fe NWs) with high length-diameters, uniform length of approximately 21 μm and diameters of approximately 60 nm were synthesized through a facile magnetic field-induced in situ reduction method without templates and surfactants. The phase structures, and micromorphology of the high-aspect-ratio Fe NWs were analyzed, and the electromagnetic properties of Fe NWs-paraffin composites were measured with a vector network analyzer at 2–18 GHz. The Fe NWs-paraffin composite with a low filler loading also exhibited satisfactory microwave absorption performance, and the composites filled with 20 wt.% of as-prepared Fe NWs shows a minimum reflection loss (RLmin) of −44.67 dB at 2.72 GHz and effective absorption bandwidth (EAB) with reflection loss below −10 dB reached 8.56 GHz at a layer thickness of 1.42 mm. At a thickness of 3 mm, the RLmin value and EAB (RL ⩽ −10 dB) reached −29.74 dB and 3.28 GHz (3.84–7.12 GHz), respectively. This study suggests that Fe NWs with high-aspect-ratios have promising microwave absorbing applications, and provides a good reference for the preparation of ferromagnetic metal-based lightweight electromagnetic wave-absorbing materials.
研究领域:
材料科学
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电磁学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Wenjuan Shen,Bingning Wang,Falong Jia,Zhihui Ai,Lizhi Zhang
In general, the final product of atrazine (ATR) degradation by reactive oxygen species is cyanuric acid bearing a stable s -triazine ring, which is not further oxidized under mild conditions. In this study, we demonstrate that the presence of Ni(II) can increase the aerobic ATR degradation rate of core–shell Fe@Fe 2 O 3 nanowires (CSFN) by 6 times and also achieve the cleavage of recalcitrant s -triazine ring. The cleavage of s -triazine ring in this novel system was confirmed by the measurements of formic acid and nitrite acid. On the basis of experimental results, a feasible mechanism was proposed to account for the promoted aerobic ATR degradation and the facile s -triazine ring cleavage as follows. First, Ni(II) adsorbed on the surface of CSFN was reduced to nickel metal, which favored the generation of active hydrogen (•H). The in-situ generated •H then reduced ATR to 4-ethylamino-6-isopropylamino-1,3,5-triazine intermediate of easy ring opening property, rather than the recalcitrant cyanuric acid. Finally, this ATR degradation pathway change promoted the aerobic ATR degradation and benefited the s -triazine ring cleavage. This study clarifies the importance of degradation pathway on the ring-opening of organic pollutants, and also provides a mild method to remove s -triazine herbicides with molecular oxygen and zero-valent iron.
研究领域:
环境科学
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化学
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DOI
高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 32
·7614-7621
·
IF 5.066
Junyao Shen,Yongtao Yao,Yanju Liu,Jinsong Leng
We demonstrate a facile, template-free route for Fe nanowires (NWs) with an average diameter of 100 nm through magnetic-field-assisted hydrothermal conditions. The aspect ratio of the Fe NWs reaches 50. Fe NWs are constructed with interconnected bead-like nanospheres, which are composed of primary nanocrystals (NCs) with an average size of 8 nm. This shows that the polycrystalline Fe NWs have a body-centred cubic (bcc) structure with preferential growth on the 〈110〉 zone axis. Such hierarchical structures involve orientational growth in the presence of an external magnetic field. The molarity of the reducing agent, reaction time and temperature, are further investigated to understand the influence of these parameters on the growth process of Fe NWs. Compared with those of Fe nanoparticles (NPs), the magnetic properties of Fe NWs show both higher saturation magnetization (154.03 emu g−1) and coercivity (360.84 Oe). The peak value of reflection loss (RL) reaches up to −27.28 dB at 3.68 GHz, indicating the excellent microwave absorption performance of the Fe NWs for low gigahertz usage (2–6 GHz). This mild approach to control Fe NWs is easy to scale-up for other iron-related magnetic nanodevice applications.
研究领域:
材料科学
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电磁学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2018
·
IF 4.229
Xin Xie,Yunhua Yang,Yong-Hao Xiao,Xiaomo Huang,Qingshan Shi,Wei-De Zhang
Owing to its up-conversion photoluminescence , photo-induced electron transfer property, and excellent conductivity, carbon quantum dots (CQDs) have been established as effective sensitizers in combination with Fe 2 O 3 nanowires for enhancing the catalytic activity of photoelectrochemical water oxidation . In comparison to pristine Fe 2 O 3 nanowires, Fe 2 O 3 nanowires decorated with CQDs demonstrate 27 orders of magnitude increase in photocurrent density at 0.23 V vs. Ag/AgCl. The mechanism of enhanced photoelectrochemical activity of CQDs/Fe 2 O 3 composite was also investigated. Thereby, it is confirmed that the enhanced optical absorption, accelerated interfacial charge carrier transfer and effective separation of photogenerated electron-hole pairs induced by CQDs decoration account for the enhancement of CQDs/Fe 2 O 3 nanowire arrays in photoelectrochemical application.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
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IF 19
Zhengtao Xu,Chen Wang,Zhuangzhuang Zhao,Yuxin Zhang,Yao Ying,Juan Li,Liang Qiao,Jingwu Zheng,Shenglei Che,Jing Yu
Theranostic probes that integrate diagnosis and treatment together are considered as effective tools for individual therapy. However, the separation of detection and treatment components limits precise assessment of therapeutic efficacy. Herein, a novel self-monitoring probe that sensitively responds to adenosine triphosphate (ATP) was developed by ultrafine iron oxide nanowires (UIONWs) through an oleyl amine-assisted way. The UIONWs, with a diameter of 1.5 nm and length of 75 nm, are surface-coordinated with oleyl amine. UIONWs can be decomposed in ATP-containing solution and expose the shielded iron ions. Consequently, it can boost the peroxidase (POD) activity and activate the T 1 -magnetic resonance imaging (MRI) signal by ATP. In addition, UIONWs can be rapidly engulfed into cells due to the high aspect ratio. The improved ATP and hydrogen peroxide (H 2 O 2 ) within tumor cells leads to higher hydroxyl radicals (OH) generation for effective tumor inhibition.In contrast, normal cells exhibit lower ATP and H 2 O 2 levels, reducing cytotoxicity and ensuring safety. Since both the illumination of T 1 -MRI and OH generation are ATP-controlled, this work raised a potential way to self-monitor tumor therapy with timely feedback on therapeutic effects.
研究领域:
生物医学工程
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纳米医学
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影像医学
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产品关联
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 3
·1233-1240
·
IF 3.361
Yong Li Tong,Bao Qian Chi,Dong Li Qi,Weiqiang Zhang
Designing electrode structures with high activity is very significant for energy conversion systems. However, single electrode materials often exhibit poor electronic transportation. To address this issue, we prepared P-Fe2O3 nanowire arrays through a convenient hydrothermal and phosphation method. The as-obtained electrode materials exhibited excellent electrocatalytic performance, which could be attributed to the P element decoration improving the reaction active sites. The as-obtained P-Fe2O3-0.45 nanowire arrays exhibited excellent OER activity with a low overpotential of 270 mV at 10 mA cm−2 (72.1 mV dec−1), excellent HER performance with a low overpotential of 126.4 mV at −10 mA cm−2, a small Tafel slope of 72.5 mV dec−1 and long durability. At the same time, the P-Fe2O3-0.45 nanowire arrays possessed a low cell voltage of 1.56 V at 10 mA cm−2.
研究领域:
材料科学
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能源转换系统
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电化学
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产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2023
·
IF 4.1
Ping-an Yang,Zhongbang Liu,Lihua Zou,Rui Li,Zhihao Zhou,Wenjiao Deng,Mengjie Shou,XinYu Wang,Jiufei Luo
The increasing utilization of wearable electronics in human-computer interaction and medical health urges the rapid development of flexible strain sensors. However, it is still a challenge to fabricate flexible strain sensors with high sensitivity, linearity, and stability. Herein, we presented a freezing/magnetic orientation approach to construct dual-ordered porous conductive networks based on the reduced graphene oxide (rGO)/Fe nanowire (NW)/carboxymethyl cellulose (CMC) to optimize the sensing performance of the flexible strain sensors. Owing to the stable and ordered porous conductive network constructed by ice template-assisted rGO and magnetic field-induced Fe NW, the sensing performances of rGO/Fe NW/CMC ordered network composite were significantly improved. The prepared rGO/Fe NW/CMC strain sensor demonstrated a high gauge factor of 112.44, which was 426.90 % and 108.06 % higher than the samples with only ordered Fe NW network and only ordered rGO network, respectively. Meanwhile, the rGO/Fe NW/CMC strain sensor presented a linearity of 0.99 and a stability over 3000 dynamic stretching cycles, which was better than the sample without Fe NW and ordered rGO network. Owing to the excellent sensing performance, the rGO/Fe NW/CMC strain sensors were successfully used to monitor the human gestures, indicating the potential as practical wearable devices for real-time motion detection in human-computer interaction and medical health.
研究领域:
材料科学
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电子工程
·
生物医学工程
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2025
·
IF 4.9
Zhirui Zhao,Qiao Chen,Shengcai Du
Flexible pressure sensors are integral to the advancement of next-generation wearable electronics, electronic skins, and human–machine interfaces. However, the concurrent realization of lightweight design, mechanical stability, and high sensitivity remains an ongoing challenge. Here, we present a high-performance flexible pressure sensor based on a polyurethane (PU) sponge integrated with Ti₃C₂Tₓ MXene nanosheets, iron nanowires (Fe NWs), and waterborne polyurethane (WPU). The 2D MXene provides superior electrical conductivity, while the 1D Fe NWs interconnect discontinuous regions within the porous structure, forming a robust three-dimensional conductive network. WPU facilitates uniform dispersion and strong interfacial bonding between the conductive fillers and the sponge matrix, thereby enhancing both mechanical integrity and sensing stability. The resulting sensor exhibits a high sensitivity of 6.9 kPa⁻¹ , a broad sensing range up to 15 kPa, rapid response and recovery times (97 ms and 66 ms, respectively), and excellent durability over 3000 mechanical cycles. In addition to reliable pressure detection, the device enables dual-functional capabilities, including real-time spatial pressure mapping using a 4 × 4 sensor array, localized Joule heating under mechanical stress, and accurate grip monitoring when integrated into wearable gloves. The sensor is fabricated via a cost-effective, scalable dip-coating method, offering practical advantages for industrial production. This work not only demonstrates a synergistic assembly strategy of 2D/1D nanomaterials within porous elastomeric frameworks but also paves the way for multifunctional, wearable sensing platforms capable of addressing real-world application demands in healthcare, robotics, and human–environment interaction.
研究领域:
材料科学
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纳米技术
·
传感器
·
柔性电子
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可穿戴技术
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2025
·Vol. 68
·期 8
·1-11
·
IF 4.9
Yang Ping-an,Zhao Chensong,Luo Jiufei,Zou Lihua,Liu Zhongbang,Gui Yingang,Zhou Zhihao
This study develops a flexible strain sensor with electromagnetic interference (EMI) shielding, hydrophobicity, and acid/alkali resistance by integrating a bi-ordered porous structure with a micro-raised surface. The structure, mimicking lotus leaves, is fabricated using magnetic field-assisted freezing orientation and laser ablation on graphene (Gr)/Fe nanowire (NW)-infused aerogel and polydimethylsiloxane. The sensor, with a Gr to Fe NW ratio of 9:1, shows a high gauge factor of 85.19 in the 0–30% tensile strain. These values are 304%, 430%, 702%, and 1226% of the samples with Gr to Fe NWs ratios of 7:1, 5:1, 3:1, and 1:1, respectively. It achieves an EMI shielding efficiency (SE) of 20.02 dB and a specific SE of 807.48 dB cm 2 /g in the 8.2–12.4 GHz range, 150% higher than isotropic samples. The sensor exhibits a contact angle of 155.76°, maintaining hydrophobic stability under stretching and showing excellent resistance to acid and alkali. Additionally, the sensor can be integrated into wearable devices like gloves for gesture recognition, machine hand manipulation, and controlling neon bulbs, demonstrating potential for applications in field robotics and human-robot interaction.
研究领域:
材料科学
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纳米技术
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传感器
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电磁学
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柔性电子学
·
表面工程
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机器人学
·
人机交互
✓ 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）