JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Hongzhan Chen,Binbin Sun,Jiaqi Zhang,Zhiliang Zhang,Jianbo Qu
In this work, integrated in-situ reducibility of polydopamine (PDA) with magnetic-responsive performance of ferroferric oxide (Fe 3 O 4 ) nanoparticles, a series of Fe 3 O 4 @PDA@AgNPs were engineered through in-situ grown silver nanoparticles (AgNPs) on the surface of Fe 3 O 4 nanoparticles. The synthesized Fe 3 O 4 @PDA@AgNPs could serve as superb surface enhancement Raman scattering (SERS) substrates for ultrasensitive detection of multi-component industrial dyes in the complex environment. With 4-aminothiophenol (4-ATP) as probe molecules, the Fe 3 O 4 @PDA@AgNPs demonstrated exceptional SERS sensitivity and uniformity, achieving an enhancement factor as high as 7.8 × 10 6 . Notably, the Fe 3 O 4 @PDA@AgNPs demonstrated outstanding magnetic response and molecular enrichment effect, and realized multi-component detection of Rhodamine 6 G (R6G) and Nile Blue A (NBA) molecular mixtures. The detection limit for R6G and NBA was 1 × 10⁻⁷ M and 5 × 10⁻⁷ M respectively. The magnetic Fe 3 O 4 @PDA@AgNPs represent outstanding SERS platforms, and would hold great potential in the quantitative and qualitative detection of dye molecules.
研究领域:
纳米技术
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分析化学
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材料科学
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光谱学
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环境监测
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化学传感
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2018
·Vol. 42
·期 14
·12212-12221
·
IF 3.201
Yukun Sun,Dongyun Li,Hui Yang,Xingzhong Guo
Fe3O4@polydopamine@polyamidoamine (Fe3O4@PDA@PAMAM) core–shell nanocomposites were successfully fabricated through a monodispersed Fe3O4 nanoflower synthesis, PDA modification and PAMAM grafting. The as-prepared single Fe3O4@PDA@PAMAM nanocomposite possesses a high relevant saturation magnetization (Ms) (30.25 emu g−1), while the coercivity (Hc) (10.85 Oe) and retentivity (Mr) (0.9062 emu g−1) were extremely low. The obtained Fe3O4@PDA@PAMAM has an adsorption capacity as high as 97.18 mg g−1 for Cu(II), and the adsorption process is in conformity with pseudo-second-order kinetics and the Langmuir isotherm model. Moreover, the effect of pH and thermodynamics of the adsorption process is also discussed briefly.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2024
·
IF 5.7
Xiangyu Ma,Yaoying Cui,Kexing Zhu,Xiufang Zhu,Lijing Zhang,Liming Guo,Liangdong Feng,Jiadong Zhang,Yihong Wang,Ling Xia
Background Nanozymes , a new class of nanomaterials , have emerged as promising substitutes for enzymes in biosensor design due to their exceptional stability, affordability, and ready availability. While nanozymes address many limitations of natural enzymes, they still face challenges, particularly in achieving the catalytic activity levels of their natural counterparts. This indicates the need for enhancing the sensitivity of biosensors based on nanozymes. The catalytic activity of nanozyme can be significantly improved by regulating its size, morphology, and surface composition of nanomaterial. Results In this work, a kind of hollow core-shell structure was designed to enhance the catalytic activity of nanozymes. The hollow core-shell structure material consists of a nanozymes core layer, a hollow layer, and a MOF shell layer. Taking the classic peroxidase like Fe 3 O 4 as an example, the development of a novel nanozyme@MOF, specifically p-Fe 3 O 4 @PDA@ZIF-67, is detailed, showcasing its application in enhancing the sensitivity of sensors based on Fe 3 O 4 nanozymes. This innovative nanocomposite, featuring that MOF layer was designed to adsorb the signal molecules of the sensor to improve the utilization rate of reactive oxygen species generated by the nanozymes catalyzed reactions and the hollow layer was designed to prevent the active sites of nanozymes from being cover by the MOF layer. The manuscript emphasizes the nanocomposite's remarkable sensitivity in detecting hydrogen peroxide (H 2 O 2 ), coupled with high specificity and reproducibility, even in complex environments like milk samples. Significance and novelty This work firstly proposed and proved that Fe 3 O 4 nanozyme@MOF with hollow layer structure was designed to improve the catalytic activity of the Fe 3 O 4 nanozyme and the sensitivity of the sensors based on Fe 3 O 4 nanozyme. This research marks a significant advancement in nanozyme technology, demonstrating the potential of structural innovation in creating high-performance, sensitive, and stable biosensors for various applications.
研究领域:
生物传感
·
纳米材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Zhi-Chao Xiao,Yan Li,Cheng-Lu Liang,Rui-Ying Bao,Ming-Bo Yang,Wei Yang
Up to now, how to endow the electrode, composed of the high theoretical capacity materials, with high capacity and high capacity retention for lithium ion batteries (LIBs) is still a great challenge. Herein, for the anodes of LIBs, multi-layered GO-Fe 3 O 4 @PDA-PAM (graphene oxide-Fe 3 O 4 @polydopamine-polyacrylamide) composites, in which Fe 3 O 4 nanoparticles (NPs) are confined by the polydopamine (PDA) shell and reduced graphene oxide (rGO) sheets, are fabricated through a green and scalable strategy. The multi-layered structure with confined Fe 3 O 4 NPs endows the anodes with efficient cushion effect and good electrical conductivity , leading to a good lithium ion storage capacity. More interestingly, GO-Fe 3 O 4 @PDA-PAM flakes are generated driven by the electricity and grabbed by PAM linker to form the flower-like morphology and well-maintained during the following electrochemical process. The flower-like anode holds up the aggregation of active materials and provides abundant lithium ion diffusion pathway. Therefore, based on the entire composite mass, the flower-structured GO-Fe 3 O 4 @PDA-PAM anode displays a high reversible capacity, a good cycle reversibility (1204 mAh g −1 after the 100th cycle at 0.3A g −1 ) and an admirable rate performance (702 mAh g −1 at 1A g −1 ).
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
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Meng Liu,Wenzhuo Lv,Fan Zeng,Canhui Wang,Xin Guo,Bo Zhou,Yiqiang Wu
Overcoming the inherent activity–stability trade-off in photo-Fenton systems requires advanced material architectures that integrate multifunctional synergies. In this study, we developed a multifunctional hydrogel, termed PCCF, fabricated by confining Fe 3 O 4 @polydopamine (PDA) nanoparticles within a three-dimensional (3D) pullulan–nanocellulose matrix specifically tailored for efficient doxycycline (DOX) elimination. PCCF exhibited a hierarchically engineered structure based on three synergistic strategies: (1) a pullulan (Pu)–cellulose nanofibrils (CNF)@carbon dots (CD) co-network with a hierarchically porous architecture (surface area: 230.6 m 2 /g), enabling ultrahigh adsorption capacity (Q m = 272.9 mg/g); (2) PDA-mediated nanoparticle immobilization to achieve spatial uniformity and reduce catalyst leaching (< 5 ppb Fe after five cycles); and (3) an optically transparent and mechanically resilient hydrogel framework (94.2 % transmittance at 500 nm, tensile strength: 41.7 kPa, elongation at break: 84.5 %). These integrated features synergistically improved the photo-Fenton degradation rate constant of PCCF by 3.03-fold compared to Fe 3 O 4 nanoparticles, while maintaining 90.4 % catalytic efficiency after five cycles. This work establishes a Pu hydrogel-based structural paradigm that harmonizes catalytic activity with long-term stability, offering a versatile blueprint for high-performance environmental remediation systems.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Zijie Qu,Shihan Yu,Miao Li,Yumeng Chen,Xia Liu,Xia Zhang,Guodong Zhang,Xiufeng Wang,Fang Wang,Zhiqing Zhang,Ting Zhou
This study designed and synthesized a Fe 3 O 4 @PDA@Ag-Au NPs nanocatalyst featuring a “core-shell-satellite” structure, aimed at efficiently reducing 4-nitrophenol through photothermal catalysis. Under 808 nm near-infrared laser irradiation, the material demonstrated exceptional photothermal performance and catalytic activity. The reduction rate of 4-nitrophenol reached 90.35 %, with a reaction rate constant of 0.1397 min −1 , significantly surpassing that of a water bath heating system at the same temperature. The high efficiency was attributed to two synergistic effects: the photothermal conversion facilitated by the polydopamine shell and the unique resonance effect exhibited by Ag-Au bimetals. This synergy elevated the system’s equilibrium temperature to 50.7 °C (12.8 °C higher than that of pure water) and generated active site pairs on the Ag-Au interface. These sites enhanced critical reaction steps, thereby reducing the activation energy to 13.8 kJ·mol −1 ,a reduction of 24.0 % compared to that observed in the water bath system (18.3 kJ·mol −1 ). This catalyst could be easily recovered using magnets and maintained over 90 % efficiency after seven cycles. By integrating photothermal catalysis, bimetallic synergy, and magnetic separation, this study presents a novel strategy for developing efficient and recyclable catalysts with significant potential for addressing nitroaromatic organic pollutants.
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Mei Li,Qingyou Cai,Yue Meng,Weihong Zheng,Guojiang Mao,Hua Wang
We reported a novel assembled G-wire-induced pyrene excimer switching probe for microRNA (miRNA) amplified detection on the basis of exonuclease III (Exo III)-assisted target recycling and Fe 3 O 4 @PDA nanoparticles. The multifunctional hairpin (HP) probe recognized and effectively bound to target miRNA, which formed a 3′-blunt terminal for Exo-III digestion and miRNA regeneration to initiate another Exo III-mediated cycling cleavage. After digestion, numerous HP-caged c-myc sequences were released, which were positively related to target miRNA and folded to the parallel G-quadruplex with K + . Additionally, Fe 3 O 4 polydopamine nanoparticles (Fe 3 O 4 @PDA NPs)-based magnet separation was conducted to reduce background fluorescence signal, and parallel G-quadruplexes self-asembled into filamentous G-wires with Mg 2+ . G-wires generated from 5′-terminal pyrene-labeled c-myc sequences made close distance between two labeled pyrene molecules, and induced the “turn-on” fluorescence signal of pyrene excimer switching. Moreover, gamma-cyclodextrin (γ-CD) was added, which promoted pyrene moiety, causing signal amplification in pyrene excimer fluorescence. Therefore, miRNA was efficiently measured within the homogeneous solution. This method detected miRNA within the dynamic range of 1 pM to 5 nM, with the miR-141 limit of detection (LOD) being 99 fM. It distinguished perfect-matched and mismatched target miRNAs, and showed an accurate detection of miRNA levels in different cell lines and favorable reproducibility when analyzing miRNAs within spiked serum samples. We propose a promising method for G-wire-based biosensing in disease-related biomarkers detection.
研究领域:
生物传感
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分子诊断
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纳米技术
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生物化学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 16
·5515-5527
·
IF 7.393
Yi Chen,Xing Zhao,Yan Li,Zhao-Yuan Jin,Yi Yang,Ming-Bo Yang,Bo Yin
Stimuli-responsive intelligent biomimetic materials are promoting the development of soft robotics. Despite tremendous advances in stimuli-responsive intelligent materials, it is still a challenge to design facile methods to integrate multifunctional features, including multiple-stimulus responsive ability, shape reconfiguration, reversible shape transformation and self-healing performance, into a single material system, which is an emerging interest and will greatly advance the field of intelligent bionic soft robotics. Herein, a novel multiple-stimulus responsive shape memory polymer based on biocompatible PCL/TPU/Fe3O4@PDA nanocomposites is developed by a facile and universal fabrication method. The nanocomposite film shows fast light- and magnetic-responsive ability (magnetic field: 1 s; light: 5 s). The temporary shape obtained by the combination of photothermal heating and magnetic-responsive actuation can be locked by turning off the light and magnetic field. Subsequent light illumination without the magnetic field can activate the material and drive the recovery of the initial shape. Thus, the resulting intelligent material presents shape reconfiguration and reversible shape transformation by a light and magnetic synergy response. In addition, the material exhibits excellent and repeatable shape memory assisted self-healing performance, the surface crack can be self-healed under light illumination (in 120 s), and the self-healing efficiency can reach 90.0%. Therefore, this intelligent shape memory polymer nanocomposite with its multifunctional features has great potential for advanced soft robotics in a plethora of fields, such as biomedical devices, artificial muscles, smart actuators and aerospace.
研究领域:
材料科学
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软机器人
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仿生学
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纳米技术
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智能材料
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产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Qianqian Jiang,Renlong Chen,Tong Zhang,Hao Shen,Cheng Zhang,Kui Zhang,Zhongping Zhang
Lateral flow immunochromatographic assay (LFIA) features advantages such as a rapid analysis process, interpretable detection results, and low cost, making it an effective method for on-site detection of pesticides. However, the existing LFIA technologies still face bottleneck issues, including strong background fluorescence interference from the substrate and insufficient detection sensitivity for low pesticide residue levels. Here, long-lived room-temperature phosphorescent carbon dots embedded in silica (CDs@SiO2) were developed to overcome background fluorescence interference. Fe3O4 coated with dopamine (Fe3O4@PDA) was utilized for the enrichment of target pesticide molecules. Meanwhile, by virtue of the quenching effect of Fe3O4@PDA on CDs@SiO2, colorimetric and phosphorescent dual-mode LFIA technology was designed for the detection of the pesticide acetamiprid. Through the integration of the advantages of CDs@SiO2 and Fe3O4@PDA, the limit of detection (LOD) for acetamiprid was as low as 0.271 ng/mL, and satisfactory recoveries were achieved in real samples. This research breaks through the millisecond-level lifetime limitation in traditional time-resolved fluorescence immunoassays, providing novel insight for the development of labeling materials for LFIA.
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产品关联
DOI
PubMed
高影响因子
Materials
·
2022
·Vol. 15
·期 6
·2039
·
IF 3.748
Yueqi Zhang,Bin Du,Yuting Wu,Zhiwei Liu,Jiang Wang,Jianjie Xu,Zhaoyang Tong,Xihui Mu,Bing Liu
Bacterial infection is a significant cause of morbidity and mortality to humans worldwide. Thus, a method for nonspecific, sensitive, and rapid enrichment of such bacteria is essential for bacteria detection and treatment. This study demonstrates a self-made core-shell Fe3O4@Polydopamine@Polyethyleneimine magnetic beads (Fe3O4@PDA@PEI MBs) with a high density positive charge-based magnetic separation scheme for the broad-spectrum rapid enrichment of microorganisms in the liquid phase. MBs with a high-density positive charge have a strong electrostatic attraction to most microorganisms in nature. Our scheme is as follows: (1) wrapping dopamine (DA) on the iron oxide through self-polymerization and wrapping PEI on the outermost shell layer in a mode of crosslinking with the PDA; (2) subsequently, the Fe3O4@PDA@PEI MBs were used to concentrate microorganisms from the sample solution; (3) performing magnetic separation and calculating the adsorption efficiency. The as-prepared Fe3O4@PDA@PEI MBs composite was carefully characterized by zeta potential analysis, Value stream-mapping (VSM), transmission electron microscopy (TEM), and Fourier transforms infrared spectrometry (FT-IR). In this study, both gram-positive and gram-negative bacteria could be captured in three minutes through electrostatic interaction. Furthermore, the adsorption efficiency on gram-negative (>98%) is higher than that on gram-positive (>95%), allowing for a simple, rapid assay to enrich organisms in resource-limited settings.Keywords:magnetic beads;bacterial enrichment;magnetic separation;electrostatic interaction
研究领域:
微生物学
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医学工程
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产品关联
DOI
PubMed
高影响因子
MOLECULAR PHARMACEUTICS
·
2022
·
IF 5.364
Zhaomin Tang,Weijun Tian,Hongyu Long,Shuting Jiang,Jianqing Zhao,Jianren Zhou,Qian He,Xia Luo
Multidrug resistance (MDR) is a major obstacle to effective cancer treatment. Therefore, developing effective approaches for overcoming the limitation of MDR in cancer therapy is very essential. Chemotherapy combined with photothermal therapy (PTT) is a potential therapeutic option against MDR. Herein, we developed a subcellular-targeted near-infrared (NIR)-responsive nanomedicine (Fe3O4@PDA-TPP/S2-PEG-hyd-DOX, abbreviated as Fe3O4-ATSPD) as a new photothermal agent with improved photothermal stability and efficiency. This system demonstrates high stability in blood circulation and can be accumulated at the tumor site by magnetic targeting enhanced permeability and retention effect (EPR). Near-infrared (NIR) irradiation at the tumor site generates a photothermal effect from the photosensitizer Fe3O4@PDA, leading to a dramatic decrease in mitochondrial membrane potential. Simultaneously, the conjugated drugs released under low pH condition in endosomes or lysosomes cause nucleus DNA damage and cell apoptosis. This subcellular-targeted NIR-responsive nanomedicine with efficient integration of diagnosis and therapy could significantly enhance MDR cancer treatment by combination of chemotherapy and PTT.
研究领域:
药学
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纳米技术
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癌症研究
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生物医学工程
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诊疗学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Xi Li,Zhouying Tan,Bingyan Guo,Chaojie Yu,Mengmeng Yao,Lei Liang,Xiaojun Wu,Zhongming Zhao,Fanglian Yao,Hong Zhang,Shuhua Lyu,Caideng Yuan,Junjie Li
For hydrogel wound dressings, it remains a great challenge to simultaneously achieve multifunctional hydrogels with wound-matching mechanical performance, antibacterial activity and monitoring capability for the integration of treatment and rehabilitation training monitoring during wound repair. Inspired by the highly ordered hierarchical structures of natural soft tissues, ordered magnetoelectric nanosheet structures are introduced into gelatin-oxidized dextran (Gel-ODex) hydrogels to endow the hydrogel with anisotropy and versatility in this study. First, magnetoelectric nanosheets (Fe 3 O 4 -PDA-rGO, MPG) containing polydopamine (PDA) were obtained by dopamine (DA)-mediated formation of Fe 3 O 4 nanoparticles in situ on the surface of reduced graphene oxide (rGO). Then, anisotropic Gel-ODex-MPG (GOH-MPG) hydrogels were prepared by introducing MPG into the Gel-ODex hydrogel network under a magnetic field. The GOH-MPG hydrogel exhibited anisotropic mechanical and conductive properties and great photothermal antibacterial performance under near-infrared light (NIR, 808 nm). In addition, the anisotropic GOH-MPG conductive hydrogel could accelerate infected wound healing and sensitively detect human movements, which is helpful for monitoring the wound status and for rehabilitation training during wound recovery. To the best of our knowledge, this was the first exploration of the combination of anisotropic hydrogels in the field of wound therapy and wearable sensors, which sheds light on developing anisotropic hydrogels with multifunctionality in tissue repair and personal health monitoring to realize the integration of treatment and rehabilitation training monitoring.
研究领域:
材料科学
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生物医学工程
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伤口愈合
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纳米技术
·
生物传感器
✓ 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）