LUMINESCENCE
·
2013
·Vol. 28
·期 4
·530-535
·
IF 1.273
Tao Liu,Lichun Zhang,Hongjie Song,Zhonghui Wang,Yi Lv
We report a facile one-pot sonochemical approach to preparing highly water-soluble Ag nanoclusters (NCs) using bovine serum albumin as a stabilizing agent and reducing agent in aqueous solution. Intensive electrogenerated chemiluminescence (ECL) was observed from the as-prepared Ag (NCs) and successfully applied for the ECL detection of dopamine with high sensitivity and a wide detection range. A possible ECL mechanism is proposed for the preparation of Ag NCs. With this method, the dopamine concentration was determined in the range of 8.3 × 10 –9 to 8.3 × 10 –7 mol/L without the obvious interference of uric acid, ascorbic acid and some other neurotransmitters, such as serotonin, epinephrine and norepinephrine, and the detection limit was 9.2 × 10 –10 mol/L at a signal/noise ratio of 3. Copyright © 2013 John Wiley & Sons, Ltd.
研究领域:
分析化学
·
生物医学工程
·
纳米材料科学
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DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Peng Bo,Zheng Liu-Xi,Wang Pan-Yue,Zhou Jia-Feng,Ding Meng,Sun Hao-Di,Shan Bing-Qian,Zhang Kun
On the origin of photoluminescence of noble metal NCs, there are always hot debates: metal-centered quantum-size confinement effect VS ligand-centered surface state mechanism. Herein, we provided solid evidence that structural water molecules (SWs) confined in the nanocavity formed by surface-protective-ligand packing on the metal NCs are the real luminescent emitters of Au-Ag bimetal NCs. The Ag cation mediated Au-Ag bimetal NCs exhibit the unique pH-dependent dual-emission characteristic with larger Stokes shift up to 200 nm, which could be used as potential ratiometric nanosensors for pH detection. Our results provide a completely new insight on the understanding of the origin of photoluminescence of metal NCs, which elucidates the abnormal PL emission phenomena, including solvent effect, pH-dependent behavior, surface ligand effect, multiple emitter centers, and large-Stoke’s shift.
研究领域:
材料科学
·
光物理学
·
纳米技术
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DOI
高影响因子
Journal of Nanomaterials
·
2019
·
IF 2.233
Jian Shang,Ye Sun,Teng Zhang,Zhen Liu,Hong Zhang
Silver (Ag) has broad-spectrum antibacterial properties and is widely used in various fields, including in antibacterial coatings for orthopedic implants. For reasons of cost and cytotoxicity, improvement of the antibacterial efficiency of Ag is necessary. The scientific community has also shown a strong enthusiasm in this research area. In this paper, ZnO nanorod arrays were prepared on a titanium (Ti) substrate by seed-assisted hydrothermal method and Ag nanoparticles were deposited by magnetron sputtering to obtain Ag nanoparticle-decorated ZnO nanorod arrays (ZnO nanorods/Ag nanoparticles). The antibacterial properties of ZnO nanorods/Ag nanoparticles against Pseudomonas aeruginosa were systematically studied by agar diffusion method and were compared with other samples such as ZnO nanorod arrays and ZnO seed layer/Ag nanoparticles. The experimental results showed that ZnO nanorods/Ag nanoparticles displayed significantly higher antibacterial properties against Pseudomonas aeruginosa than other samples, including ZnO nanorod arrays and ZnO seed layer/Ag nanoparticles. These superior antibacterial properties originated predominantly from the morphological structure of ZnO nanorods, which optimized the particle size and distribution of Ag nanoparticles, greatly improving their antimicrobial efficiency. The synergistic antibacterial properties of Ag nanoparticles and ZnO nanorods make Ag nanoparticle-decorated ZnO nanorod arrays a promising candidate for antibacterial coating of orthopedic implants.
研究领域:
材料科学
·
微生物学
·
生物医学工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 24
·10399-10411
·
IF 3.553
Yang Wangyang,Shen Honglie,Min Huihua,Ge Jiawei
The application of TiO 2 acetone monitor is highly limited by the high operating temperature and poor sensitivity. In this work, black TiO 2 (B-TiO 2 ) is produced by Ti 3+ self-doping and is followed by Ag modification to form B-TiO 2 @Ag. It is first demonstrated that the operating temperature and sensitivity of TiO 2 to acetone can be promoted evidently. By introducing a Ti 3+ self-doped layer on the surface of TiO 2 , as observed in TEM images, the band gap of TiO 2 is reduced to 3.01 eV. Ag surface decoration is carried out for the enhancement of electron generation. Optical absorption and the Hall effect results prove that B-TiO 2 @Ag exhibits highest photoelectrical properties. As a result, the B-TiO 2 @Ag gas sensor with a low operating temperature at 250 °C and high response of 68.19 to 50 ppm acetone is realized. The low detection limit of B-TiO 2 @Ag sensor reaches 887 ppb, which provides an applicable way for non-invasive detection of blood glucose.
研究领域:
材料科学
·
传感技术
·
生物医学工程
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DOI
高影响因子
AIP Advances
·
2020
·Vol. 10
·期 11
·
IF 1.337
Shi Dekun,Jia Guozhi,Yao Jianghong
Precious metal nanoparticle composite two-dimensional materials have attracted widespread attention due to their excellent photothermal properties. A new method for selective modification of silver nanoparticles on atomic layered molybdenum disulfide (MoS 2 ) is presented. An Ag/MoS 2 composite structure is formed under the continuous irradiation of an 808 nm laser. The heat generated by the photothermal conversion of the MoS 2 nanosheets plays a major role in the growth of silver nanoparticles. The Ag/MoS 2 composite structure is analyzed via the combination of the absorption spectrum, scanning electron microscopy, particle size distribution, and Raman spectroscopy. The photothermal conversion can drive nanometer composite heterogeneous material growth.
研究领域:
材料科学
·
光学
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DOI
高影响因子
MOLECULES
·
2026
·Vol. 31
·期 7
·1174
·
IF 5.1
Chao Song,Jiayue Xu,Hanqiong Luo,Quanli Hu
LaFeO3nanofibers and Ag-doped LaFeO3nanofibers were fabricated via an approach combining electrospinning with calcination. Their crystal structures, micro-morphologies, and chemical compositions were determined by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Raman spectroscopy, and Fourier-transform infrared spectroscopy. In addition, the conduction mechanisms and magnetic properties of the two samples were investigated using a semiconductor analyzer and a vibrating sample magnetometer. Rietveld refined X-ray diffraction analyses confirmed the orthorhombic structure. The two samples showed a nanofibrous structure. For Ag-doped LaFeO3, the conduction was dominated by the ohmic conduction mechanism in a low-resistance state, while it was governed by space-charge-limited current conduction in a high-resistance state. It also showed a high on/off ratio of 3.6 × 103. The coercivity and remanence values of Ag-doped LaFeO3were 200 Oe and 0.000404 emu g−1. This, thus, indicates the considerable application potential of Ag-doped LaFeO3for resistive random-access memory devices and magnetoresistive random-access memory devices.
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DOI
PubMed
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Bolun Wei,Yuning Ma,Yuxue Zhao,Kaihang Sun,Xin Tu,Chang-jun Liu
Multiple products are typically formed during CO 2 hydrogenation over oxide-supported metal catalysts, making the regulation of product selectivity both practically and fundamentally important. In this work, a silver-promoted In 2 O 3 catalyst (Ag/In 2 O 3 ) was synthesized using a deposition-precipitation method and employed as a model system to elucidate the pressure-dependent reactivity of the catalyst in CO 2 hydrogenation. A strong electronic metal-support interaction (EMSI) between Ag and defective In 2 O 3 (In 2 O 3-x ) is identified, which promotes the formation of catalytically active Ag-In 2 O 3-x interfacial sites. The Ag/In 2 O 3 catalyst exhibits a 100% CO selectivity at 0.1 MPa, while achieving high methanol selectivity at 5 MPa within the temperature range investigated. Kinetic analysis reveals that CO formation and methanol synthesis share the same active sites. Combined in situ catalyst characterization and theoretical calculations demonstrate that elevated pressure enhances CO adsorption and stabilizes surface CO*, thereby promoting the further hydrogenation of CO* to CH 3 O* and ultimately leading to high methanol selectivity. This work provides mechanistic insights into pressure-controlled selectivity in catalytic CO 2 hydrogenation and offers a promising strategy for tuning product distribution via the change in the pressure.
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Mengjie Han,Kaichun Xu,Yiwen Zhou,Shuaihu Chen,Chao Zhang
In recent years, respiratory gas analysis has gained considerable attention for the early detection of lung cancer. This paper presents the preparation of gas sensors based on SmFeO 3 porous microspheres using a one-step hydrothermal method. Ag nanoparticles were uniformly loaded onto the surface of SmFeO 3 microspheres through impregnation and annealing strategies. The materials were systematically characterized using techniques such as X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet–visible-near-infrared absorption spectroscopy (UV–VIS-NIR). The gas sensing tests indicated that the 4 % Ag-loaded SmFeO 3 sensor demonstrated the highest response to isopropanol (22.59 at 15 ppm) under operating conditions of 30 % relative humidity (RH) and 225 °C, which is twice that of the pure SmFeO 3 sensor. Moreover, the sensor exhibited excellent selectivity toward isopropanol gas. Ultimately, this paper explores the sensitization mechanism of the Ag-loaded SmFeO 3 sensor, providing technical support for its potential application in the early detection of lung cancer.
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产品关联
DOI
高影响因子
Plasmonics
·
2026
·
IF 4.3
Xu Yanpei,Hao Haixing,Wang Qi
This work presents a high-sensitivity surface plasmon resonance (SPR) temperature sensor based on a BK7 prism coated with silver film and NiO nanoflowers. NiO nanoflowers were synthesized via hydrothermal method and deposited onto the Ag film using a drop-casting technique (3 cycles optimized). The resulting BK7/Ag/NiO nanoflowers structure significantly enhances refractive index (RI) sensitivity. Finite element method (FEM) simulations and experimental measurements confirmed the sensor's performance. The Ag/NiO nanoflowers sensor achieved a remarkable RI sensitivity of 4138.34 nm/RIU, representing a 63.83% improvement over a bare Ag film sensor. Leveraging this enhanced sensitivity and the strong thermo-optic coefficient of silicone oil, a temperature sensor (BK7/Ag/NiO nanoflowers /silicone oil) was developed. It exhibited an excellent temperature sensitivity of -1.61 nm/°C over the range of 25 °C to 75 °C, with a low detection limit of 0.075 °C. The sensor also demonstrated good repeatability and stability, making it a promising candidate for highly sensitive temperature sensing applications.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2014
·
IF 5.9
Lin Mei,Zhentan Lu,Xinge Zhang,Chaoxing Li,Yanxia Jia
Herein, a nontoxic nanocomposite is synthesized by reduction of silver nitrate in the presence of a cationic polymer displaying strong antimicrobial activity against bacterial infection. These nanocomposites with a large concentration of positive charge promote their adsorption to bacterial membranes through electrostatic interaction. Moreover, the synthesized nanocomposites with polyvalent and synergistic antimicrobial effects can effectively kill both Gram-positive and Gram-negative bacteria without the emergence of bacterial resistance. Morphological changes obtained by transmission electron microscope observation show that these nanocomposites can cause leakage and chaos of intracellular contents. Analysis of the antimicrobial mechanism confirms that the lethal action of nanocomposites against the bacteria started with disruption of the bacterial membrane, subsequent cellular internalization of the nanoparticles, and inhibition of intracellular enzymatic activity. This novel antimicrobial material with good cytocompatibility promotes healing of infected wounds in diabetic rats, and has a promising future in the treatment of other infectious diseases.
研究领域:
纳米材料
·
抗菌治疗
·
生物医学工程
·
传染病
·
伤口愈合
✓ 已验证
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2026
·Vol. 9
·期 3
·266
·
IF 15.5
Liu Xiaoyu,Sun Jie,Galluzzi Massimiliano,Zhong Huanqiong,Zhou Zhenfu,Chen Shiguo
Pathogenic microbes and house dust mites (HDM) are critical factors associated with severe asthma and pathogenic infections that severely threaten human health worldwide. Therefore, it is urgent to develop biocide alternatives to inactivate pathogenic microbes and HDM, and to reduce immunogenicity of HMD. Silver (Ag)/titanium dioxide (TiO 2 ) nanoparticle (ATN) exhibits a significant synergistic enhancement effect due to destructive reactive oxygen species (ROS) generation under UV irradiation, while its antimicrobial and acaricidal activities and related action mechanisms without light irradiation are still unclear. Herein, a water-dispersible ATN was prepared facilely by a photocatalytic reduction process. ATN exhibited improved antimicrobial activity due to synergistic antimicrobial effect of Ag and TiO 2 based on destructive nitric oxide (NO) generation in the absence of light. And ATN exhibited good acaricidal activity against HDM due to oxidative stress-induced mitochondrial disorder, lysosome swelling and rupture arising from NO generation. Especially, ATN can effectively reduce immunogenic Dermatophagoides farinae group 1 (Der f 1) and Dermatophagoides farinae group 2 (Der f 2). The work proposes an alternative approach to develop biocide alternatives and acaricidal materials, and it can help readers better comprehension of synergistically enhanced antimicrobial and acaricidal activities and relative action mechanisms of meta doped TiO 2 nanoparticles.
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DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Liying Song,Tao Zhou,Jing Wang,Hongmeng Ding,Liyan Yu,Zhaolin Yang,Na Song,Lina Sui,Lifeng Dong
Biofouling remains a critical challenge in polyamide thin-film composite reverse osmosis (RO) membranes, significantly impairing performance and increasing operational costs. To address this, we developed a thermoresponsive antibacterial strategy by grafting poly(N-isopropylacrylamide)-silver (PNIPAm-Ag) nanocomposites onto RO membrane surfaces via a potassium persulfate (K₂S₂O₈)-assisted grafting method. The resulting thin-film nanocomposite (TFN) membranes leverage the temperature-sensitive phase transition of PNIPAm to regulate Ag + release: at temperatures below the lower critical solution temperature (LCST), PNIPAm swells and retains Ag + ; upon temperature rise during RO operation (e.g., 37 °C), it collapses and triggers controlled Ag + release. This intelligent response enables potent antimicrobial activity, achieving inhibition rates of 99.8 % against E. coli , 98.4 % against S. aureus , and 94.6 % against C. albicans . Furthermore, the modified membranes exhibit enhanced antifouling properties with a flux recovery rate (FRR) of 91.45 %, improved long-term stability, and maintained high salt rejection (>99 %). This work presents a promising approach for developing smart, self-defensive RO membranes with on-demand antibacterial functionality.
研究领域:
材料科学
·
环境工程
·
膜技术
·
纳米技术
·
抗菌材料
✓ 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）