JOURNAL OF ELECTRONIC MATERIALS
·
2021
·Vol. 50
·期 11
·6426-6437
·
IF 1.938
Zhang Chao,Sun Huajun,Zhu Quanyao
In this paper, two methods (magnetic stirring and mechanical ball milling) were used to modify the surface of lead zirconate titanate (PZT) particles. Then, poly(vinylidene fluoride) (PVDF)/PZT piezoelectric films were prepared by extrusion casting and solvent casting. We investigated the mechanical, dielectric, ferroelectric, and piezoelectric properties, as well as the breakdown strength of the PVDF/PZT films. We found that adding PZT particles improved the mechanical stability of the films under variable temperature conditions. Modification by the UP-105 titanate coupling reagent further improved the combination and dispersion of PZT@105 particles in PVDF. The films prepared by extrusion casting showed improved properties in terms of density, dielectric constant, breakdown strength, and piezoelectric coefficient. The piezoelectric coefficient ( d 33 ) of the PVDF/PZT@105 composite film (with 25 wt.% PZT@105) prepared by extrusion casting reached 35 pC/N, and the electromechanical strain ratio was almost 1.6%, which is higher than that of piezoelectric ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2014
·
IF 3.259
Ming Gao,Huili Wang,Meiping Ma,Yuna Zhang,Xiaohan Yin,Randy A. Dahlgren,Dongli Du,Xuedong Wang
Herein, we developed a novel integrated apparatus to perform phase separation based on magnetic-stirring, salt-induced, liquid–liquid microextraction for determination of five fluoroquinolones in animal-based foods by HPLC analysis. The novel integrated apparatus consisted of three simple HDPE (high density polyethylene) parts that were used to separate the solvent from the aqueous solution prior to retrieving the extractant. The extraction parameters were optimized using the response surface method based on central composite design: 791 μL of acetone solvent, 2.5 g of Na 2 SO 4 , pH 1.7, 3.0 min of stir time, and 5.5 min centrifugation. The limits of detection were 0.07–0.53 μg kg −1 and recoveries were 91.6–105.0% for the five fluoroquinolones from milk, eggs and honey. This method is easily constructed from inexpensive materials, extraction efficiency is high, and the approach is compatible with HPLC analysis. Thus, it has excellent prospects for sample pre-treatment and analysis of fluoroquinolones in animal-based foods.
研究领域:
分析化学
·
食品安全
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2015
·Vol. 6
·期 1
·778-785
·
IF 3.84
Huajun Li,Yining Wu,Xiaoda Wang,Chunying Zhu,Taotao Fu,Youguang Ma
This paper is mainly focused on the investigation of the magnetofluidic control of the breakup of ferrofluid droplets in a symmetric Y-junction. The asymmetric breakup of the ferrofluid droplet or non-breakup with filtering the mother droplet into a desired branch to separate it from the satellite droplet was implemented by an external magnetic field. The breakup processes of ferrofluid droplets with and without the magnetic field were studied systematically. The influences of both the flow rate ratio between the continuous phase and dispersed phase and the magnetic flux density on the sizes of daughter droplets were determined. It was found that the attractive magnetic force shifted the mass center of mother droplet in the upstream main channel, which accordingly facilitated the asymmetric breakup of the droplet at the downstream Y-junction. A power function correlation for precisely predicting the sizes of daughter droplets was proposed by introducing the magnetic Bond number (Bom). Moreover, we also found that the controllable magnetic force could promote the pattern transition between the breakup and non-breakup of ferrofluid droplets.
研究领域:
微流体力学
·
材料科学
·
流体力学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2021
·
IF 9.709
Shengnan Yan,Zhenggui Li,Xiaobing Liu,Fang Chen,Wangxu Li,Jie Cheng
Magnetically driven photothermal conversion and energy storage techniques can enhance the energy storage performance of phase change materials (PCMs) and thus have immense potential in energy applications. Paraffin is a common PCM that melts slowly and has poor rate of heat storage capacity. In this study, the effect of a controllable magnetic field on the photothermal and heat storage properties of paraffin was investigated. First, a reduced-graphene-oxide/nickel foam (rGO@Ni foam) composite film with good photothermal ability, corrosion resistance, and oxidation resistance was prepared, and photothermal conversion and energy storage processes under different magnetic fields were experimentally studied. The movement of the composite film could be adjusted by the action of magnetic force, especially to enhance the phase interface movement, accelerate paraffin melting, and improve the photothermal capacity and heat storage characteristics of the material. The composite film and phase interface could be dynamically tuned by regulating the magnetic field, thus enhancing the photothermal conversion effect. In particular, with increasing magnetic field strength, the thermal energy storage efficiency and speed of phase interface movement increased by 29% and 50%, respectively. The proposed magnetic force-driven method will enhance solar energy conversion and promote direct solar energy applications.
研究领域:
材料科学
·
能源技术
·
太阳能应用
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 10
·7304-7310
·
IF 3.708
Hong Yang,Ming Xu,Ling-Xiang Guo,Hao-Fan Ji,Jun-Yu Wang,Bao-Ping Lin,Xue-Qin Zhang,Ying Sun
This manuscript presents a facile thiol–ene photo-click chemistry method to prepare magnetic stir bar-encapsulated polysiloxane-based organocatalyst gels under benign conditions, and develops a Stir Bar-Encapsulated Catalysis (SBEC) technique. Through thiol–ene addition chemistry, we graft olefin-terminated organocatalysts (i.e. MacMillan catalyst, proline catalyst, and N-heterocyclic carbene catalyst) onto poly[3-mercaptopropylmethylsiloxane], which is further photo-crosslinked to coat the embedded magnetic stir bar. The prepared magnetic stir bar-encapsulated polysiloxane-based organocatalyst gels can be put into reaction flasks to perform stirring and catalysis functions at the same time. The most important benefit of SBEC technique is to infinitely simplify the catalyst/product separation procedure by using a simple stir-bar-retriever, even without any precipitation/filtration steps. The catalytic performances of three different organocatalyst gels applied in asymmetric Diels–Alder reaction, asymmetric aldol reaction and benzoin condensation reaction respectively are also examined herein.
研究领域:
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Hao Zhong,Zeyin Mao,Xuwen Li,Anni Deng,Yihao Zhu,Shihong Wang,Leyang Huang,Jianxin Zhao,Wenqi Lv,Yixuan Shi,Qin Huang,Yabo Zhai,Chenzhou Hui,Xianbo Luo,Li Ma,Rongxin Fu,Xiongjun Ye,Guoliang Huang
Small extracellular vesicles (sEVs), which are ubiquitously present in bodily fluids, hold significant promise as biomarkers for disease diagnosis and targeted therapy. However, their isolation remains challenging due to their small size (typically < 200 nm) and the complexity of biological fluids. This study presents a novel microfluidic strategy integrating Magnetic Stirring with Tangential Flow Filtration (MS-TFF). The automated, portable device (palm-sized, 12.5 cm × 11.1 cm × 6.25 cm) features user-friendly operation: inserting the chip into a slot and closing the lid initiates automated sEV extraction. The system processes 10 mL of morning urine or cell culture supernatant within ~40 minutes. Compared to ultracentrifugation (UC), MS-TFF reduces processing time from ~4 hours to ~40 minutes while achieving a 6-fold higher sEV yield. Clinical validation using urine from 16 subjects (6 healthy/10 prostate cancer patients) enabled quantitative ⁎ KLK3/PCA3 ⁎ RNA biomarker detection, achieving AUC = 0.93 for cancer diagnosis, confirming its diagnostic potential.
研究领域:
分子生物学
·
肿瘤学
·
转化医学
·
生物医学工程
·
液体活检
·
纳米医学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 14
·1135
·
IF 4.3
Mingzhang Zhu,Zeren Zhou,Yanhong Gu,Lina Bing,Yuqin Xie,Zhenjiang Shen,Wanping Chen
In sharp contrast to photocatalysis and other prevalent catalytic technologies, tribocatalysis has emerged as a promising technology to degrade high-concentration organic dyes in recent years. In this study, BaTiO3(BTO) nanoparticles were challenged to degrade methyl orange (MO) solutions with unprecedentedly high concentrations through magnetic stirring. With BTO nanoparticles and home-made PTFE magnetic rotary disks in 50 mg/L MO solutions, 10 h of magnetic stirring resulted in 91.4% and 98.1% degradations in an as-received glass beaker and in a beaker with a PTFE disk coated on its bottom, respectively. Even for 100 mg/L MO solutions, nearly complete degradation was achieved by magnetic-stirring-stimulated BTO nanoparticles in beakers with the following four kinds of bottom: 97.3% degradation in 30 h for a glass bottom, 97.4% degradation in 20 h for a PTFE coating, 97.9% degradation in 42 h for a Ti coating, and 97.4% degradation in 74 h for an Al2O3coating. Electron paramagnetic resonance (EPR) analyses revealed that the generation of reactive oxygen species (ROS) by magnetic-stirring-stimulated BTO nanoparticles is dramatically affected by the bottom material of beakers. These findings suggest an appealing prospect for BTO nanoparticles to utilize mechanical energy for sustainable water remediation.
研究领域:
环境科学
·
纳米技术
·
催化
·
水污染治理
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Acta Biomaterialia
·
2023
·
IF 9.7
Chenyang Yao,Fang Yang,Jiaji Zhang,Junlie Yao,Yi Cao,Hao Peng,Stefan G. Stanciu,Costas A. Charitidis,Aiguo Wu
Recent years have witnessed important developments in the emerging field of magneto-mechanical therapies. While such approaches have been demonstrated as a highly efficient route to augment, complement, or entirely replace other therapeutic strategies, important aspects are still poorly understood. Among these, the dependence between the cell death pathway and the geometry of magnetic nanocomposites enabling magneto-mechanical therapies under a low-frequency rotating magnetic field (RMF) is yet to be deciphered. To provide insights into this important problem, we evaluate the cell death pathway for two magnetic nanocomposites with highly distinct geometries: Zn 0.2 Fe 2.8 O 4 -PLGA magnetic nanospheres (MNSs) and Zn 0.2 Fe 2.8 O 4 -PLGA magnetic nanochains (MNCs). We show that under exposure to an RMF, the MNSs and the MNCs exhibit a corkscrewed circular propulsion mode and a steering propulsion mode, respectively. This distinct behavior, with important implications for the associated magneto-mechanical forces exerted by these nanomaterials on surrounding structures (e.g., the cellular membrane), depends on their specific geometries. Next, using numerical simulations and cell viability experiments, we demonstrate that the field strength of the RMF and the rotating speed of the MNSs or MNCs have strong implications for their magneto-mechanical therapeutic performance. Last, we reveal that the magneto-mechanical effects of MNSs are more prone to induce cell apoptosis, whereas those of the MNCs favor instead cell necrosis. Overall, this work enhances the current understanding of the dependences existing between the magneto-mechanical therapeutic effects of magnetic nanocomposites with different geometries and associated cell death pathways, paving the way for novel functionalization routes which could enable significantly enhanced cures and biomedical tools. Statement of significance (1) Under exposure to an RMF, the investigated MNSs and MNCs exhibit corkscrewed circular and steering propulsion modes, respectively; (2) When actuated by an RMF, MNCs exhibit higher therapeutic performance via magneto-mechanical forces exerted on cell parts, compared to MNSs; (3) The magneto-mechanical effects of MNSs are more prone to induce cell apoptosis, whereas those of the MNCs favor instead cell necrosis.
研究领域:
纳米医学
·
生物医学工程
·
细胞生物学
·
治疗学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Atmosphere
·
2022
·Vol. 13
·期 4
·543
·
IF 3.11
Zhongcheng Wang,Jingsong Feng,Xiaoyu Liu,Hao Guo
Carbon capture is one of the important methods to achieve carbon neutrality. In this paper, a simple and reliable method for the preparation of poly(anthraquinone)/multi-walled carbon nanotube composites (PAQ/MWCNTs) for capturing carbon dioxide is proposed. Using constant magnetic stirring, 1,4-anthraquinone (1,4-AQ) was allowed to accumulate on multi-walled carbon nanotube (MWCNTs) substrates via π–π. The poly(anthraquinone)/multi-walled carbon nanotube composites were produced by this continuous process. Besides, the carbon cloth electrode prepared from PAQ/MWCNTs composites was subjected to redox potentials for carbon dioxide capture. Results showed that PAQ/MWCNTs composites had good redox reversibility, their carbon dioxide capture capacity was 7.80 mmol·g−1while the material utilization rate reaches reached 73.4%.Keywords:1,4-anthraquinone;multi-walled carbon nanotubes;magnetic stirring;poly(anthraquinone)/multi-walled carbon nanotube composites;carboxylation;carbon dioxide capture
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 33
·期 12
·125101
·
IF 3.874
Donghang Xu,Yuanqin Su,Qianhao Xu,Ting Huang,Zhilan Chen,Tianyuan Zhang
Cationic polyethylenimine (PEI) is regarded as the 'golden standard' of non-viral gene vectors. However, the superiority of PEI with high positive charge density also induces its major drawback of cytotoxicity, which restricts its application for an effective and safe gene delivery to stem cells. To redress this shortcoming, herein, a magnetic gene complex containing uniform iron oxide nanoparticles (UIONPs), plasmid DNA, and free PEI is prepared through electrostatic interactions for the gene delivery to bone marrow-derived mesenchymal stem cells (BM-MSCs). Results show that UIONPs dramatically promote the gene delivery to BM-MSCs using the assistance of magnetic force. In addition, decreasing the free PEI nitrogen to DNA phosphate (N/P) ratio from 10 to 6 has little adverse impact on the transgene expression levels (over 300 times than that of PEI alone at the N/P ratio of 6) and significantly reduces the cytotoxicity to BM-MSCs. Further investigations confirmed that the decrease of free PEI has little influence on the cellular uptake after applying external magnetic forces, but that the reduced positive charge density decreases the cytotoxicity. The present study demonstrates that magnetic gene delivery not only contributes to the enhanced gene expression but also helps to reduce the required amount of PEI, providing a potential strategy for an efficient and safe gene delivery to stem cells.
研究领域:
纳米技术
·
基因治疗
·
干细胞研究
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Hanzhang Zhao,Chao Yang,Yadong Liu,Qiaoqiao Wang,Yongyi Wu,Qiuxuan Mu,Feiyan Hou,Tai Min,Tao Li
Multiferroic heterostructures offer a promising platform for next-generation low-power spintronic devices by enabling electric-field control of magnetism. While recent advances in two-dimensional (2D) van der Waals (vdW) magnetic and ferroelectric materials have sparked significant interest, achieving reliable and nonvolatile electrical modulation of magnetism at room temperature within vdW multiferroic heterostructures remains a substantial challenge. Here, this study demonstrates robust, reproducible, and nonvolatile electrical control of ferromagnetism in Fe 3 GaTe 2 /CuInP 2 S 6 multiferroic heterostructures under ambient conditions. The modulation is evidenced macroscopically by reshaped magnetic hysteresis loops in anomalous Hall voltage measurements and microscopically by in situ magnetic and electric field-induced domain evolution captured via magnetic force microscopy. The first-principles calculations reveal that the polarization of CuInP 2 S 6 induces a significant modulation of the Dzyaloshinskii-Moriya interaction (DMI) in Fe 3 GaTe 2 . Incorporating these effects into micromagnetic simulations reproduces key features of the experimental hysteresis behaviors, indicating that the polarization-enhanced DMI lowers domain wall formation energy and drives a transition from coherent to incoherent magnetic reversal. These findings not only surmount the challenge of electrically modulating ferromagnetism in vdW systems via remanent ferroelectric polarization at room temperature but also open new pathways for energy-efficient skyrmion manipulation and vdW spintronic device engineering.
研究领域:
材料科学
·
凝聚态物理
·
纳米电子学
·
自旋电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2018
·
IF 3.862
Qianhao Xu,Tianyuan Zhang,Qiyue Wang,Xinchi Jiang,Ai Li,Ying Li,Ting Huang,Fangyuan Li,Ying Hu,Daishun Ling,Jianqing Gao
Recent advances in nanomaterials have made iron oxide nanoparticles (IONPs) as an innovative approach for the delivery of genes. However, the effectiveness of IONPs-assisted gene delivery is currently suffering from their poor uniformity, which not only exhibits detrimental effect on the magnetic property, but also leads to the poor reproducibility to maintain the optimal gene delivery. To this end, the present study developed extremely uniform 15 nm-sized IONPs with a good monodispersity in water phase. These ultra-uniform IONPs exhibit notable potentials for an efficient gene delivery to human mesenchymal stem cells (hMSCs) with the assistance of magnetic force, which partly owes to their abilities to facilitate the cellular uptake, as well as to induce the rapid DNA release and the following nuclear transport. Besides, no significant detrimental effects of these IONPs are observed either on the proliferation or the multi-lineage differentiation potential of hMSCs. The current study highlights the potential advantages of designing extremely uniform magnetic nanomaterials for an efficient and safe delivery of genes to stem cells.
研究领域:
纳米技术
·
生物材料
·
干细胞生物学
·
基因治疗
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）