SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Na Xiao,Jiang Xue Dong,Shi Gang Liu,Na Li,Yu Zhu Fan,Yan Jun Ju,Nian Bing Li,Hong Qun Luo
Selective and sensitive detection of multiple metal ions is significant for biological researches and environmental monitoring, because the abnormal metal ions levels have potential damage to the human body and environment. In this study, a fluorescent sensing platform based on Ag nanoclusters has been established for independent detection of Hg 2+ , Cu 2+ , and Fe 3+ ions in a solution. The interference of the fluorescence induced by coexistent metal ions was removed by altering buffers with different pH and using different masking agents. Moreover, the detection mechanism is discussed in detail, which provides a valuable reference for the detection of heavy metal ions with metal nanomaterials. This sensor exhibits a high selectivity and sensitivity, and the linear ranges for Hg 2+ , Cu 2+ , and Fe 3+ detection are 0.05-9, 0.05-18, and 0.1–18 μM with the corresponding detection limits of 12, 27, and 50 nM, respectively. Furthermore, this method was successfully used for analyzing the three metal ions in environmental and biological samples.
研究领域:
分析化学
·
环境科学
·
生物传感
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2020
·
IF 2.726
Xiaolong Zhang,Hui Zheng,Shilei Jin,Yuhong Jiang,Yaxin Wang,Yang Liu
Multifunctional nanocomposites with well-defined structures and optimized electromagnetic properties are highly desirable in surface-enhanced Raman scattering (SERS) and catalytic reduction reactions. We report a novel multifunctional Fe 3 Pt–Ag nanoparticle with efficient SERS performance and excellent catalytic activity. Fe 3 Pt–Ag shows an obviously enhanced SERS effect, which is evaluated by enhanced Raman signal of Rhodamine B (RhB). Efficient SERS performance of Fe 3 Pt–Ag is attributed to the optical property of local surface plasmon resonance of Ag nanoparticles (NPs). Importantly, spontaneous catalytic reduction reactions of RhB illustrate that Fe 3 Pt–Ag possesses good catalytic performance. In combination with the theories of pseudo-first-order kinetics, catalytic reduction reactions are analysed in detail, and experimental data are in line with theoretical results. Fe 3 Pt–Ag can be easily recycled at least six times via an external magnetic field , elaborating that our developed Fe 3 Pt–Ag can be applied to protect environment as a novel composite material.
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DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 18
·3151
·
IF 4.329
Meng Zhang,Guohui Wang,Xin Zhang,Yuqi Zheng,Shaoxiang Lee,Dong Wang,Yang Yang
In this paper, polyvinyl alcohol/Ag-Metal-organic framework (PVA/Ag@MOF) and polyvinyl alcohol/chitosan (PVA/CS) were used as the inner and outer layers to successfully prepare a bilayer composite hydrogel for tissue engineering scaffold. The performance of bilayer hydrogels was evaluated. The outer layer (PVA/CS) has a uniform pore size distribution, good water retention, biocompatibility and cell adhesion ability. The inner layer (PVA/Ag@MOF) has good antibacterial activity and poor biocompatibility. PVA, PVA/0.1%Ag@MOF, PVA/0.5%Ag@MOF, and PVA/1.0%Ag@MOF show anti-microbial activity in ascending order. However, its use as an inner layer avoids direct contact with cells and prevents infection. The cell viability of all samples was above 90%, indicating that the bilayer hydrogel was non-toxic to A549 cells. The bilayer hydrogel scaffold combines the advantages of the inner and outer layers. In summary, this new bilayer composite is an ideal lung scaffold for tissue engineering.
研究领域:
生物材料学
·
医学工程
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DOI
高影响因子
Frontiers of Chemical Science and Engineering
·
2023
·Vol. 18
·期 1
·1-9
·
IF 4.5
Sun Likun,Xiong Kesi,Zhang Baoning,Fang Jinghong,He Yingchao,Wang Min,Gan Zhixing,Du Fanglin,Sun Qiong,Yu Liyan,Dong Lifeng
In a dual-chamber photocatalytic fuel cell device, polyvinyl alcohol degradation and H 2 evolution were concurrently achieved. The setup involved commercial P25 as the photoanode and Ag@Fe 2 O 3 nanoparticles as the cathode. Additionally, the feasibility of a Fenton-like reaction in the cathode, utilizing Fe 2+ ions and pumped O 2 , was demonstrated. Different cathode materials, polyvinyl alcohol types, and pH values’ effects were assessed on device performance. Quenching tests highlighted photoinduced holes (h + ) and OH· radicals as pivotal contributions to polyvinyl alcohol degradation. Long-term stability of the device was established through cycling experiments.
研究领域:
环境科学
·
材料科学
·
能源科学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 41
·35001-35007
·
IF 3.289
Xuehong Zhang,Min Wei,Bingjing Lv,Yuanjian Liu,Xu Liu,Wei Wei
Glucose and cholesterol in human fluids are clinically important analytes and their sensitive detection is significant in diagnosis. In this study, Au@Ag core–shell nanoparticles (Au@Ag NPs) prepared by in situ growth of silver nanoparticles (AgNPs) on the surface of thiol-PEG-capped gold nanoparticles (AuNPs, 13 nm) have been successfully applied to fabricate a colorimetric biosensing platform for glucose and cholesterol. Au@Ag NPs showed an obvious absorbance peak at 375 nm due to the surface plasmon resonance (SPR) absorption of AgNPs. In the presence of cholesterol and glucose, H2O2 was produced under the catalytic action of their corresponding enzymes such as glucose oxidase (GOx) or cholesterol oxidase (ChOx), which etched the AgNPs shell of Au@Ag NPs. As a result, their characteristic absorbance at 375 nm decreased, accompanied with a perceptible color change from orange to red, which could be used to detect glucose and cholesterol by the naked eye. Under optimum conditions, the linear ranges for the detection of glucose and cholesterol by UV-vis spectroscopy were from 0.5 to 400 μM and 0.3 to 300 μM, respectively. The detection limit of the biosensors for glucose and cholesterol were 0.24 μM and 0.15 μM, respectively. The practical applications of this method in urine or human serum have been realized with satisfactory results. This work provides a simple and sensitive approach for glucose and cholesterol detection, which has broad application prospects in clinical diagnosis.
研究领域:
生物医学
·
纳米技术
·
临床诊断
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DOI
高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Mohsin Ali Marwat,Weigang Ma,Pengyuan Fan,Hassan Elahi,Chanatip Samart,Bo Nan,Hua Tan,David Salamon,Baohua Ye,Haibo Zhang
The progress in advanced dielectrics by tremendously enhancing the discharge energy densities is of great importance for the current electronic power systems . Herein, we report heterogeneous sandwich-structured nanocomposites with low nanofillers content, which offered the ultrahigh discharge energy density ( U e ) of 21.03 J/cm 3 at 592.1 MV/m. This energy density is the highest reported until now, with similar nanoparticle content and equivalent electric field. We used linear-type polyetherimide as the outer two layers, which offered insulation of charge injection from electrodes, reduced polymer free-volume, improved breakdown strength , and enhanced the overall thermo-mechanical stability. Besides, dopamine@Ag@BaTiO 3 nanoparticles (DA@Ag@BT NPs)-modified ferroelectric-type polyvinylidene fluoride is employed as the middle layer for rendering higher polarizability and additionally increased breakdown strength due to well-known Coulomb blockade effect. Finite element simulations showed reduced local electric field in the outer, as well as middle layer matrixes, indicating higher breakdown strength and consequently higher energy storage prospects of heterogeneous sandwich-structured nanocomposites. The energy storage results at high temperatures demonstrated its significant thermal stability until 170 °C. Overall, this contribution not only paves the new way for developing industrially viable low nanofillers-concentrated flexible dielectric films but also provides the insight of polarization mechanism and electric breakdown in heterogeneous sandwich-structured dielectric materials.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2019
·Vol. 93
·期 2
·291-301
·
IF 1.986
Ji Lijun,Qin Xiang,Zheng Jingjing,Zhou Shu,Xu Tong,Shi Guojun
Ag–Carbon–TiO 2 composite tubes were prepared by using polystyrene/AgNO 3 composite fibers as a sacrifice template and a co-pyrolysis process. The Ag–Carbon–TiO 2 tubes were characterized by SEM, TEM, X-ray diffraction, Raman spectrum, XPS, and UV–vis spectrum. The results showed that the Ag–Carbon–TiO 2 tubes possessed uniform tubular structure with amorphous carbon, graphitic carbon, and Ag nanoparticles (AgNPs) distributing uniformly in TiO 2 . The Ag–Carbon–TiO 2 tubes were confirmed high UV–vis light utilization and photocatalytic degradation efficiency to Rhodamine B due to the carbon doping, the surface plasmon resonance of AgNPs and the tubular structure, and the degradation of Rhodamine B reached 90% in 6 h. Meanwhile, they showed an excellent antibacterial effect on staphylococcus aureus, and the fatality rate of Ag–Carbon–TiO 2 tubes to staphylococcus aureus reached 99.9% in 24 h when its concentration was higher than 4 mg/ml. The co-pyrolysis process could repress the AgNPs to grow to be large particles, which could be a key for the excellent antibacterial property. The research showed a promising strategy for preparing Ag–Carbon–TiO 2 composite tubes by co-pyrolysis of PS composite electrospinning fibers, indicating their potential application in wastewater treatment and antibacterial materials.
研究领域:
材料科学
·
环境科学
·
微生物学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2017
·Vol. 28
·期 1
·1-8
·
IF 2.325
Wang Shilei,Wu Jie,Yang Hao,Liu Xiangyu,Huang Qiaomu,Lu Zhong
Dental caries is a widespread disease mainly caused by the anaerobic oral pathogen Streptococcus mutans ( S. mutans ). Ag/ZnO nanocomposite is an efficient antibacterial agent because of its high antibacterial activity and low cytotoxicity. In this study, rod-like Ag/ZnO nanocomposite was synthesized through a deposition-precipitation method and characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The activity of Ag/ZnO nanocomposite against S. mutans was evaluated by determining the minimal inhibitory concentration, minimum bactericidal concentration and growth inhibition curve. The results showed that Ag/ZnO nanocomposite displayed higher activity against S. mutans compared with pure ZnO nanorods. Moreover, the antibacterial mechanism was investigated by determining the bacterial membrane potential, release of K + , intracellular reactive oxygen generation and lipid peroxidation. Disruption of membrane function and oxidation of biomacromolecules played important role in the antibacterial action of Ag/ZnO nanocomposite. This work proposes a potentially effective dental antibacterial agent against the dental caries-causing S. mutans .
研究领域:
微生物学
·
材料科学
·
牙医学
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Yanzhe Zhang,Xiangmei Liu,Zhaoyang Li,Shengli Zhu,Xubo Yuan,Zhenduo Cui,Xianjin Yang,Paul K. Chu,Shuilin Wu
Interfacial characteristics play an important role in infection prevention and osteointegration of artificial bone implants. In this work, both Ag nanoparticles (AgNPs) and ZnO NPs are incorporated into hydroxyapatite (HA) nanopowders and deposited onto Ti6Al4V (Ti6) implants by laser cladding. The composite coatings possess a hierarchical surface structure with homogeneous distributions of Ag and ZnO. The Ag and ZnO NPs that are immobilized by laser cladding ensure long-term and gradual release of Ag and Zn ions at low cumulative concentrations of 36.2 and 56.4 μg/L after immersion for 21 days. A large concentration of Ag released initially increases the cytotoxicity but the large initial ZnO content enhances the cell viability and osteogenetic ability. The nano Ag/ZnO-embedded HA coating (Ag/ZnO/HA = 7:3:90 wt %, namely Ag7ZnO3HA) exhibits optimal antibacterial efficacy and osteogenetic capability, as exemplified by the broad spectrum antibacterial efficacy of 96.5 and 85.8% against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively, together with enhanced osteoinductivity with higher alkaline phosphatase (ALP) activity of 134.60 U/g protein compared to 70.79 U/g protein for the untreated implants after culturing for 7 days. The rabbit femoral implant model further confirms that the optimized composite coating accelerates the formation of new bone tissues indicating 87.15% of the newly formed bone area and osteointegration showing 83.75% of the bone–implant contact area even in the presence of injected S. aureus. The laser-cladded Ag7ZnO3HA composite coatings are promising metallic implants with excellent intrinsic antibacterial activity and osteointegration ability.
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2026
·Vol. 98
·期 33
·24439-24447
·
IF 7.3
Wang Yaqi,Zhang Ying,Zhang Yan,Ma Xue,Zheng Ting,Xu Zhiming,Zhao Suoqi,Shi Quan,Chen Zhengyu,Xu Chunming,Zhang Linzhou
Mesophase pitch is a pivotal precursor
for advanced carbon
materials,
yet feedstock selection still relies on time-consuming thermal polycondensation
and ex situ microscopy. Here we report an Ag + -induced electrospray
ionization high-resolution mass spectrometry (ESI-HRMS) strategy for
rapid screening of mesophase-forming feedstocks in complex hydrocarbon
systems. The method exploits the structural sensitivity of Ag + -induced aromatic complexation, quantified through the response
of [2M + Ag] + multicomplex ions. Model compound studies
confirmed that Ag + preferentially complexes with high-aromaticity,
short-side-chain molecules, mirroring ideal mesophase precursor features.
Across FCC slurry oils, residual oil, and supercritical fluid extraction
fractions, the [2M + Ag] + signal correlates positively
with mesophase content and with the development of ordered mesophase
texture. Collision-induced dissociation (CID) analysis further indicates
that the dominant multicomplexes adopt an “aromatic-Ag + -aromatic” sandwich-like structure and are primarily
contributed by short-side-chain 3–5-ring aromatics.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 23
·1842
·
IF 3.2
Zhang Junda,Li Chenyu,Wang Chongyan,Ke Jingli,Wang Yunpeng,Ma Haitao
With the development of advanced electronic packaging technologies, higher requirements have been placed on the service reliability of low-temperature solders. However, Bi-rich phase coarsening and excessive growth of interfacial intermetallic compound (IMC) in Sn58Bi solder restrict its engineering applications. In order to improve the microstructure and mechanical reliability of Sn58Bi solder, Ag-coated ZnO (ZnO@Ag) nanoparticles were successfully fabricated by electroless silver plating and Sn58Bi-xZnO@Ag (x = 0, 0.3, 0.5, 0.7, and 1.0 wt.%) composite solders were prepared by ball milling. The effects of ZnO@Ag addition on the wettability of solder joints, matrix microstructure, interfacial IMC growth, and shear properties were systematically investigated. The results showed that the addition of 0.3 wt% ZnO@Ag exhibited the optimal strengthening effect. Compared with the unreinforced Sn58Bi solder, the wetting angle decreased from 39.18° to 36.32°, the Bi-rich phase became finer with the number fraction of fine Bi-rich phase regions (0.1 < A ≤ 1 μm 2 ) reaching 31.78%. Meanwhile, the average thickness of the interfacial IMC decreased from 0.85 μm to 0.67 μm. Ultimately, the shear strength of the solder joints increased from 51.49 MPa to 69.62 MPa. The performance improvement may be attributed to the synergistic effects of heterogeneous nucleation, grain-boundary pinning, and interfacial diffusion blocking induced by the ZnO@Ag nanoparticles. This study demonstrates that the appropriate addition of ZnO@Ag is an effective approach for improving the reliability of Sn58Bi low-temperature solder, which can provide a reference for the design of high-reliability low-temperature lead-free composite solder.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2026
·
IF 7.8
Yihan Wu,Shanhong Wan,Shanshan Xiao,Chenxin Wang,Shaoqing Lu,Weite Meng,Mingquan Li,Lulu Huang,Khak Ho Lim,Yu Liu
Earth-abundant tetrahedrite Cu12Sb4S13 is a promising p-type thermoelectric (TE) material owing to its intrinsically low lattice thermal conductivity, yet its performance remains limited by insufficient electrical transport and the persistent trade-off between charge and phonon transport. In this study, we present a colloidal route for the scalable synthesis of Ag-substituted Cu12Sb4S13 nanocrystals and use these nanocrystal building blocks to construct bulk tetrahedrite TE materials with improved transport balance. Ag incorporation preserves the tetrahedrite framework while inducing lattice expansion, increased microstrain, local bond softening, and enhanced structural disorder, which can be retained to a meaningful extent after densification. These structural perturbations are accompanied by a marked enhancement in electrical conductivity and weighted mobility, together with a substantial suppression of lattice thermal conductivity. The optimally substituted Cu11.92Ag0.08Sb4S13 sample exhibits the best overall transport performance, reaching a lattice thermal conductivity of 0.30 W m–1 K–1 and a maximum zTmax of 1.23 at 690 K, representing an approximately 1.8-fold improvement over pristine Cu12Sb4S13, as well as competitive theoretical conversion efficiency and slightly improved hardness. These results highlight Ag-substituted nanocrystals as effective building blocks for improving the TE performance of earth-abundant tetrahedrites through coordinated control of structure and transport.
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DOI
高影响因子
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