Nano Energy
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2017
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IF 12.343
Wei Xu,Long-Biao Huang,Jianhua Hao
Triboelectric nanogenerator (TENG) as a promising mechanical energy harvester has been rapidly developed recently. However, its robustness and endurance are seriously challenged by frequent and inevitable mechanical impacts during operation. Herein, we demonstrate, for the first time, a fully self-healing TENG possessing the ability to recover its performance after damage by introducing healable polymer materials and electrodes consisting of small magnets into the device. Our works imply that high-performance self-healing TENG can be readily realized attributed to not only the excellent mechanical-healing capability of the employed healable polymer but also the quick electric-healing capability of the novel magnetic-assisted electrodes designed for the TENG. The measurements indicate that both the output voltage and current of the healed device can reach up to above 95% of their original values even after the 5th breakage-healing cycle. Additionally, the presented TENG also shows shape-tailorability and object-adaptability. This maximizes the effective contact area of device and further increases the electric output performance to benefit energy harvesting and self-powered sensing of versatile mechanical motions. This research will offer feasible strategies for developing novel mechanical energy harvesting devices and self-powered sensors with recoverability, robustness and adaption.
研究领域:
材料科学
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能源技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Kehui Xue,Lianqing Yu,Chong Liu,Huihua Luo,Yaping Zhang,Haifeng Zhu,Wei Xing
Photoelectrochemical (PEC) devices could play a significant role in efficient solar-to-fuel production for a sustainable economy. Herein, we report a significant enhancement of PEC water splitting via rational tailoring of ferromagnetic ordered oxygen evolution cocatalysts (OECs) iron-cobalt oxide on the Mo-doped BiVO 4 (Mo:BiVO 4 ) surface. The Fe 3+ and Co 2+ tend to form an optimal electron-filled arrangement, contributing to lower barriers for the oxygen evolution reaction (OER). Benefiting from the Fe/Co dual-site as the catalytic center, the prepared FeCoO x /Mo:BiVO 4 photoanode achieves 4.55 mA·cm −2 at 1.23 V vs reversible hydrogen electrode (RHE) with a lower starting potential for OER, outperforming the FeO x /Mo:BiVO 4 (2.71 mA·cm −2 ) and CoO x /Mo:BiVO 4 (3.48 mA·cm −2 ). Importantly, ferromagnetic iron-cobalt oxide as the spin polarizer can optimize the OER kinetics. Under spin-related effects, a magnetic stimulation strategy can further enhance the spin alignment. The corresponding photocurrent of FeCoO x /Mo:BiVO 4 is increased up to 5.15 mA·cm −2 under a magnetic field, with η Sep and η Trans reaching 89 % and 91 %, respectively. Specifically, the spin-polarization process will be helpful for the production of O(↓)O(↓)H intermediates, preferring to produce O 2 . Hence, this study provides a new pathway for designing highly efficient PEC water splitting systems on magnetic-assisted photoelectrodes.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Zeyu Ma,Yuhao Wu,Shan Lu,Jianing Li,Jianbo Liu,Xiaodong Huang,Xiaodong Zhang,Yin Zhang,Guangneng Dong,Liguo Qin,Sen Yang
3D printing has shown promise in the development of notable sensing and health detection devices. Nonetheless, challenges remain in the concurrent development of highly durable wearable sensors with low-friction surfaces. This challenge serves as a limiting factor in the operational lifespans of these sensors. In this study, a magnetically assisted 3D printing technique is developed to fabricate composites reinforced with magnetic Fe 3 O 4 @SiO 2 nanochains (NCs) with dimensions of 60.2 µm in length (L) and 0.2 µm in diameter (D), indicating an L:D ratio exceeding 300. By applying a vertical magnetic field and extrusion flow field to the sensor's surface layer, the NCs can be arranged differently (together with the printed textures), reducing the coefficient of friction by 27.7% and improving the wear resistance. This approach is inspired by nacre, known for its impressive durability and resilience. A motion monitoring sensor with an extended lifespan is successfully fabricated by using liquid metal ink integrated with an anti-wear layer. These findings offer significant insights into the evolution of wearable sensors, demonstrating their adaptability to multi-material printing and resulting in improved performance and service lives.
研究领域:
材料科学
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纳米技术
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生物医学工程
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增材制造
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
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2019
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IF 3.019
Miao Guan,Jiabin Chen,Xiaoping Zhang,Liu Yang,Binjue Wang,Shengkui Zhong
Yarn-ball-shaped P2-Na 2/3 Fe 1/2 Mn 1/2 O 2 nanofiber cathode material is synthesized by a magnetic-assisted electrospinning method. Based on the electrospinning method, an electromagnetic-field is performed to keep the nanofibers rotating to form the yarn-ball-like architecture. XRD result indicates that the sample is a pure P2-type Na 2/3 Fe 1/2 Mn 1/2 O 2 phase with good crystallization. SEM results show that the diameter of the balls is about 10–50 µm, and the balls are composed of nanofibers with a diameter of 200–400 nm. This special architecture is beneficial to increase the Na + diffusion speed and tap-density of nanofiber material. Electrochemical tests show that the sample has a high discharge specific capacity of 218.6 mAh g −1 at 0.1 C rate, and exhibits good rate capability and excellent cycling performance.
研究领域:
材料科学
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电化学
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纳米科技
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能源存储
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无机化学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yunpeng Xu,Yanzi Zhang,Xiaolu Sui,Aisha Zhang,Xinguang Liu,Zhenyu Lin,Jihong Chen
MicroRNA-21(miRNA-21) can act as a novel biomarker in early stage of acute kidney injury (AKI). The development of simple but sensitive miRNA-21 detection technology is helpful for prevention and treatment of AKI. In this work, based on the cascaded signal amplifications of the target-induced hybridization chain reaction (HCR) and magnetic assisted enrichment, a highly sensitive homogeneous electrochemiluminescence (ECL) biosensor for miRNA-21 detection had been developed. Firstly, capture probe H1 (CPH1) had been modified on magnetic beads (MBs) which could capture target (miRNA-21) and trigger HCR amplification to produce long strand dsDNA in the homogeneous solution. Ru(phen) 3 2+ could be embedded into the grooves of dsDNA and played the role of luminous tag, which could be separated by magnetic easily to realize the enrichment. Then the enriched products had been dissolved in the buffer solution and the ECL signal could be detected easily. The ECL intensity had a linear correlation with the logarithm of miRNA-21 concentration in the range of 1.0 fM-1.0 nM, the detection limit was 0.14 fM. The method developed in this work showed well sensitivity, specificity, which had been applied to detect miRNA-21 in urine of AKI patients with satisfied results.
研究领域:
生物技术
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分析化学
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纳米技术
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医学诊断
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yi Xu,Md Mehedi Hassan,Afang Zhu,Huanhuan Li,Quansheng Chen
A new dual-mode optical-nano-sensor was designed to effectively isolate, discriminate and inactivate multiple foodborne pathogens through the combined effort of magnetic SERS tags and functionalized upconversion nanoparticles. The positively charged quaternary ammonium salt (QAS) functionalized upconversion nanoparticles (UCNPs@QAS) were used as a fluorescent probe for the analysis of total bacteria count and inactivation of bacteria, and 4-mercaptophenylboronic acid (4-MPBA) modified magnetic Au@Ag NPs (MAu@Ag@MPBA) were applied as a SERS tag for isolation and classification of bacteria. Various types of bacteria can be captured by UCNPs@QAS through electrostatic interactions and by MAu@Ag@MPBA via the reversible recognition interaction of a boronic acid group of 4-MPBA and peptidoglycan from bacteria simultaneously. And then the formed complex structural assemblies were isolated rapidly from the sample matrix by employing the magnetic force for fast and simple dual-model optical detection. In addition, the novel biosensor was successfully applied to discriminate and detect Escherichia coli , Salmonella , Staphylococcus aureus, and their mixture in contaminated milk with the classification rate of 97.2–100 %. The proposed multi-functional nano-platform was able to sensitively capture, detect, and kill foodborne pathogens in a complex system, which could be deployed successfully towards the monitoring of food safety.
研究领域:
生物传感
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食品安全
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纳米技术
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULAR PHARMACEUTICS
·
2020
·
IF 4.321
Wei Dong,Pengying Wu,Mengfan Qin,Shifang Guo,Huasheng Liu,Xinxing Yang,Wen He,Ayache Bouakaz,Mingxi Wan,Yujin Zong
Gene therapy is likely to be the most promising way to tackle cancer, while defects in molecular strategies and delivery systems have led to an impasse in clinical application. Here, it is found that onco-miRNAs of the miR-515 and -449 families were upregulated in hepatocellular carcinoma (HCC), and the sponge targeting miR-515 family had a significant probability to suppress cancer cell proliferation. Then, we constructed non-toxic sponge-loaded magnetic nanodroplets containing 20% C6F14 (SLMNDs-20%) that are incorporated with fluorinated superparamagnetic iron oxide nanoparticles enhancing external magnetism-assisted targeting and enabling a direct visualization of SLMNDs-20% distribution in vivo via magnetic resonance imaging monitoring. SLMNDs-20% could be vaporized by programmable focused ultrasound (FUS) activation, achieving ∼45% in vitro sponge delivery efficiency and significantly enhancing in vivo sponge delivery without a clear apoptosis. Moreover, the sponge-1-carrying SLMNDs-20% could effectively suppress proliferation of xenograft HCC after FUS exposure because sponge-1-suppressing onco-miR-515 enhanced the expression of anti-oncogenes (P21, CD22, TIMP1, NFKB, and E-cadherin) in cancer cells. The current results indicated that ultrasonic cavitation-inducing sonoporation enhanced the intracellular delivery of sponge-1 using SLMNDs-20% after magnetic-assisted accumulation, which was a therapeutic approach to inhibit HCC progression.
研究领域:
癌症生物学
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纳米技术
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治疗学
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医学成像
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Huiyu He,Rui Wang,Rongbin Nie,Nan Dong
Trace amounts of pharmaceuticals and personal care products (PPCPs) in aquatic environment poses a non-negligible risk to human health. Here, an environmentally friendly cucurbit[7]uril-mediated magnetic-assisted matrix solid phase dispersion (Q[7]- m -MSPD) extraction method was developed for extracting PPCPs from complex aquatic organisms. The extraction of PPCPs were achieved via the host-guest interaction between Q[7] and targets, significantly reducing the matrix interference. Gold magnetic nanoparticles (AuMNPs) were chelated to Q[7]-target complexes and used for purification and enrichment via magnetic solid-phase extraction (MSPE), effectively replacing the complex operation of sample loading and elution on SPE columns in MSPD. Coupled with high performance liquid chromatography-tandem mass spectrometry, multiple analysis of 14 PPCPs in 3 aquatic plants and an aquatic animal were achieved, with detection limits ranging from 0.0015 to 0.0179 μg/kg, recoveries ranging from 71.06 to 113.6 %, and enrichment factors within 46 to 152. The green chemistry assessment confirmed the environmental friendliness, economic feasibility, and application potential of the Q[7]- m -MSPD, with an AGREE score of 0.63 and a BAGI score of 72.5. By integrating the merits of MSPD and MSPE, the proposed approach exhibited high sensitivity and anti-interference capability, simple operation, and great environmental friendliness. Therefore, the approach provided a green method for simultaneously detecting multiple hazardous residues in complex matrices owing to the broad-spectrum molecular recognition capability of Q[7] , which has a good application prospect in food safety and environmental monitoring.
研究领域:
分析化学
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环境科学
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绿色化学
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食品安全
·
药物分析
·
生物分析化学
✓ 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）