OPTICAL MATERIALS
·
2025
·
IF 4.2
Rui Wu,Yulin Wang,Xi Song,Hairan Zhang
Antibiotic residues in food and environment pose a serious threat to human's health and ecological system. Therefore, it is crucial and urgent challenge to fabricate Surface-Enhanced Raman Scattering (SERS) substrate with high sensitivity to detect pesticide residues. A multifunctional three-layer Fe 3 O 4 /HAP/Ag nanoparticle system was fabricated as an active SERS substrate. The active substrate was characterized by comprehensive techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM), Scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), mapping, and X-ray photoelectron spectroscopy (XPS). The FHA was not only employed to detect ciprofloxacin (CIP) solution by SERS but also it was successfully applied for detection of CIP in fish body. It showed excellent linear relationship in the range of 1.0 × 10 −8 - 1.0 × 10 −3 mol/L for CIP, with low limit of detection (7.5 × 10 −9 mol/L), satisfactory enhancement factor, stability, and repeatability. A novel approach for detecting analyte in animal's body based on SERS was developed. It could be potential candidate to rapid detection of analyte for animal and it will open new perspective in application of SERS in vivo.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Li Sun,Zheng Ye,Yuan Zhi,Hua Zhang,Binlin Dou,Yuejin Shan,Jian Chen
In this study, a prospective strategy on seed-mediated growth in vacuum is provided and used to prepare flexible silver nanofilms (AC 0–3 NFs) with high purity, crystallinity and SERS performance. Noteworthy, AC 2 NFs surface is uniformly covered with silver nanoparticles (Ag NPs), following the appearance of numerous nano-gaps between Ag NPs. Through the finite-difference time-domain (FDTD) simulation, it is found that the ultra-small nano-gaps less than 5 nm can generate abundant “hot spots” to amplify the Raman signal. Therefore, the above AC 2 NFs as SERS substrates exhibit superior activity for the SERS detection of thiram in tomato juice, with the limit of detection (LOD) of 10 −15 M and the enhancement factor (EF) of 3.7 × 10 11 . Meanwhile, AC 2 NFs show outstanding reproducibility and stability during the SERS detection. Additionally, the calibration curve is established, by which the thiram (10 −7 to 10 −15 M) can be quantitatively detected. Clearly, the as-prepared flexible AC 2 NFs have great potential in the SERS detection and analysis.
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Surfaces and Interfaces
·
2025
·
IF 6.3
Aidi Xie,Jia Zhang,Chun Chen,Yunxia Zhang,Haimin Zhang,Huijun Zhao,Guozhong Wang
Semi-hydrogenation of syngas-based dimethyl oxalate (DMO) to valuable methyl glycolate (MG) intermediate has attracted considerable attention recently, while the yield of MG remains a challenge due to thermodynamically favorable continuous hydrogenation of DMO to ethylene glycol (EG). Silver catalysts were reported to be effective but suffered from low stability. Herein, we precisely designed an amino-functionalized mesoporous silica (NH 2 -MS) nanospheres-encapsulated Cu-Ag bimetallic catalyst (CuAg@NH 2 -MS) by a hybrid strategy of EDTA-modification and vacuum-impregnation. The designed bimetallic catalyst exhibited the best compromise between conversion and selectivity with a high MG yield of ∼96.3%, outperforming the unmodified CuAg@MS and mono-metallic Cu@NH 2 -MS and Ag@NH 2 -MS catalysts. Transmission electron microscope analysis revealed that amino-functionalization can effectively disperse and stabilize Cu-Ag nanoparticles. Hydrogen temperature-programmed reduction and X-ray photoelectron spectroscopy confirmed enhanced electron transfer between Cu and Ag species, as well as between Cu-Ag nanoparticles and the NH 2 -MS support. The highly dispersed active metals and enhanced electron interaction ultimately enabled a high MG yield by breaking the trade-off between DMO hydrogenation activity and MG selectivity. This robust catalyst also exhibited remarkable stability in continuous operation for 300 h in a fixed bed reactor. This work will facilitate precise construction of stable metal nano-catalysts for efficient catalytic selective hydrogenation.
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COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Wen-Qi Zhu,Dong Cheng,Lin-Song Li,Peng-Wei Chen,Bang-Bang Liu,Mei-Xia Zhao
This work introduces the rational design of a hierarchically structured, multi-enzyme integrated therapeutic platform, referred to as HCuS/Ag/Pt/ICG/DOX (CAPID). The platform is constructed by depositing dual-enzyme-active Ag/Pt on copper sulfide nanoparticles (CuS NPs) to remodel the tumor microenvironment (TME), followed by loading indocyanine green (ICG) as a near-infrared (NIR) fluorophore and doxorubicin (DOX) as a chemotherapeutic payload. The CAPID platform utilizes catalase to decompose H 2 O 2 into oxygen (O 2 ), which synergizes with endogenous H 2 O 2 to initiate a Fenton-like reaction, generating cytotoxic hydroxyl radicals (·OH). The redox cycling between Cu 2 + ions and intracellular thiols depletes GSH, amplifying oxidative stress cascades. NIR irradiation achieved 88.9 % tumor inhibition via spatiotemporal tri-therapy (chemo/PDT/PTT) synergy, thereby addressing the limitations of monotherapy through nanoplatform engineering.
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DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2025
·
IF 6.9
Chuang Zhu,Yilong Tian,Yafei Zhao,Yuqi Wang,Xuqing Liu
Self-lubricating fabric composites are essential in tackling problem of friction and wear for joint bearings. Controlling tribological properties of them largely hinges on manipulation of thermal conductivity. Although frictional heat transfer can be enhanced by adding functional fillers in resin matrix, they still face dilemma of poor mechanical performance. Here we report Ag-coated basalt fibers containing self-adherent levodopa/polyethyleneimine, strategically positioned between Ag films and basalt fibers to enhance interface adhesion. Benefiting from rough, continuous and compact Ag coatings, as-made composites exhibited thermal conductivity of 0.63 W/m·K and tensile strength of 240.8 MPa, representing increases of 950% and 91%, respectively, compared to conventional counterparts, enabling superior anti-wear characteristics. This polymer-assisted metal deposition approach is promising to produce long-life self-lubricating fabric composites.
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Catalysts
·
2025
·Vol. 15
·期 3
·231
·
IF 4
Tianwei Dou,Yangyang Zhu,Zhanyu Chu,Zhijun Li,Lei Sun,Liqiang Jing
Solar-driven catalytic oxidation processes for the removal of toxic gaseous pollutants have attracted considerable scientific attention, and there is a strong desire to improve the mass transfer, photogenerated charge separation, and O2activation by regulating the structure of the photocatalyst. Initially, functionalized graphene–TiO2mesoporous hollow nanofibers have been controllably fabricated by a coaxial electrospinning technique, in which functionalized graphene is controllably prepared through a sequential diazonium functionalization and silane modification and ensures its uniform distribution among TiO2nanoparticles (NPs). Subsequently, the ultrafine Ag NPs are primarily anchored onto the surface of graphene by an in situ frozen photodeposition strategy, producing Ag/functionalized graphene–TiO2mesoporous hollow nanofibers (Ag/SiG-TO MPHNFs). The optimal Ag/SiG-TO MPHNFs exhibit 3.9-fold and 4.6-fold enhancements in CO photooxidation compared with TO MPHNFs and P25 TiO2, respectively. The enhanced photoactivity can be attributed to three factors: the creation of the mesoporous hollow structure accelerates mass transfer, the incorporation of graphene facilitates the transfer of photogenerated electrons from TiO2to graphene, and the anchoring of Ag NPs improves O2activation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2025
·
IF 4.5
He Bin,Fang Jiale,Huang Haitao,He Zhengcheng,Chen Wangzhen,Ma Jianjun,Wu Hongwei
Implant-associated infections (IAIs) are severe complications following orthopedic procedures involving implanted materials. Previous researchers had created various antibacterial coatings to prevent early postoperative infections. Nevertheless, these coatings frequently lack the wear-resistant properties necessary for long-term effectiveness, and their production process is intricate. To overcome this challenge, we developed and employed a chemical technique, incorporating Ag or Cu 2 O nanoparticles uniformly into the surface of titanium alloys to confer antibacterial properties. The microstructure and elemental composition of the coating were characterized using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Our results demonstrated that the coating exhibited potent antibacterial activity, eliminating nearly all adhered bacteria within the first 6 hours. Prolonged friction test results revealed that the coating retained notable antibacterial activity and excellent biocompatibility. Notably, the straightforward fabrication process of this coating could allow for its application on implants of various shapes and materials, underscoring its potential for broad clinical adoption. In summary, this simple chemical method for surface modification of titanium alloys could provide long-lasting antibacterial properties, offering a cost-efficient and transformative strategy for preventing implant-associated infections. Graphical A. Preparation and characterization of the Ag or Cu2O nanoparticle coatings based on titanium alloy. This simple chemical deposition method for surface modification of titanium alloys provides long-lasting antibacterial properties and wear resistance. B. In-vitro antibacterial activity assay. The number of bacteria on the Ag and Cu-coated samples was significantly reduced compared to the control group. The bacterial surfaces in the samples showed significant damage, such as rupture, collapse, and distortion. C-D. In-vivo antibacterial assay of the acute osteomyelitis models and subcutaneous infection models. These nanoparticle coatings exhibit excellent in vivo antibacterial properties and maintain favorable antibacterial efficacy even after prolonged wear. Created in BioRender. Fang, J. (2025) https://BioRender.com/v64b128
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PubMed
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JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Liu Hongxu,Xie Junhao,Sun Shulin
In recent years, piezoelectric–photocatalytic materials have attracted significant attention due to their potential to address environmental pollution issues in a straightforward, effective and sustainable manner. In this paper, Ag nanoparticles are successfully immobilized on the surface of ZnO, and a multifunctional PVDF-based water treatment membrane with piezoelectric–photocatalytic performance is constructed for the first time by combining the prepared ZnO@PDA-Ag composite nano-photocatalysts with the PVDF-g-IL piezoelectric matrix. The distinctive structure of ZnO@PDA-Ag enhances charge separation in the photocatalytic process, effectively promoting the photocatalytic activity of ZnO. The grafting IL onto PVDF chain segments induces a transformation of the polar crystalline phases within the PVDF. The synergistic effect of both results in significant improvements to the membrane’s porosity, increasing the permeate flux. The PVDF-g-IL/ZnO@PDA-Ag membrane demonstrates a high degree of efficiency in the removal of various dyes with an approximate removal efficiency of 100%. Furthermore, the PVDF-g-IL/ZnO@PDA-Ag membrane displays piezoelectric polarization, resulting in the formation of a built-in electric field when exposed to ultrasound, which enhances electron–hole separation and transfer efficiency. The membrane is capable of degrading approximately 98% of the dye within a 90-min degradation experiment. Finally, the PVDF-g-IL/ZnO@PDA-Ag membrane exhibits excellent mechanical stability even after multiple self-cleaning and recycling cycles.
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ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Qi-Hua Yang,Han-Qi Wei,Gui-Hua Li,Shu-Juan Zhao,Zheng-Xiang Cai,Yu-Chen Ao,Qing-Hua Mi,Wen-Jun Wang,Ge-Mei Cai,Xiao-Long Chen
X-ray imaging plays an irreplaceable role in global security inspection, medical diagnostics, and industrial nondestructive testing, yet conventional single-crystal scintillators suffer from high costs, complex fabrication, and poor flexibility. Here, we report a flexible x-ray scintillator film (Cs 3 Cu 2 I 5 :Ag@PE) that uniquely combines industrial-scale processability with ultra-high luminescence efficiency. Ag doping can cause lattice expansion and increase material density, boosting x-ray absorption and luminescence. Notably, the film is fabricated via scalable ball milling and industrial blown film extrusion. Compared to a maximum quantum efficiency of 43.3% typically achieved via the micropatterned method, our large-scale extrusion strategy delivers a remarkable PLQY of 75.4%. The film also exhibits excellent stability (89.6% retention after 2000 h) and radioluminescence efficiency comparable to commercial LuAG:Ce. Furthermore, it achieves an ultra-low detection limit of 212.5 nGy/s and a superior spatial resolution 175% higher than commercial CsI:Tl. This work highlights a scalable and highly efficient route toward high-performance flexible x-ray imaging for clinical and industrial applications.
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ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Zihan Wei,Zhenyin Hai,Mohammad Karbalai Akbari,Zhenting Zhao,Yongjiao Sun,Lachlan Hyde,Francis Verpoort,Jie Hu,Serge Zhuiykov
Surface functionalization of two-dimensional (2D) WO 3 nanofilms by noble metal (NM) nanoparticles (NM = Ag, Pt and Pd) was successfully achieved for the first time via combination of the atomic layer deposition (ALD) process and electrochemical deposition method. Deposited NM nanoparticles were uniformly in the particle size and homogeneously dispersed on the surface of 2D WO 3 . They represented electrochemically active metal-semiconductor hybrid nanocomposites with the larger electroactive area, and consequently, substantially enhanced the electrochemical H 2 O 2 detection of the device based on functionalized 2D WO 3 nanofilms. Functionalization by Ag was found to be more efficient compared to the same functionalization by Pt and Pd nanoparticles. Particularly, Ag 200 -WO 3 nanofilms exhibited the best electrochemical performance with a high sensitivity of 282 μA mM cm −2 , extremely wide linear H 2 O 2 concentrations range from 0.2 μM to 33.6 mM, a low detection limit of 0.1 μM, fast response time of 2 s and an excellent selectivity and long-term stability. Surface functionalization by NM nanoparticles approach has clearly demonstrated the great potential in the development of hybrid nanostructured electrode for various devices with enhanced electrochemical capabilities.
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APPLIED SURFACE SCIENCE
·
2012
·
IF 2.103
Zhongbo Li,Guowen Meng,Ting Liang,Zhuo Zhang,Xiaoguang Zhu
We report a facile low-cost synthetic approach to large-scale Ag nanosheet-assembled films with a high density of uniformly distributed sub-10 nm gaps between the adjacent nanosheets on Si substrates via galvanic cell reactions. The distribution density of Ag nanosheets on substrates could be tailored by tuning the duration of the HF-etching and the concentration of citric acid in the solution. Furthermore, in conjunction with a conventional photolithography, highly uniform patterned Ag nanosheet-assembled structures with different morphologies can be achieved on Si substrates via galvanic-cell-induced growth. By using rhodamine 6G as a standard test molecule, the large-scale Ag nanosheet-assembled films exhibit highly active and homogenous surface-enhanced Raman scattering (SERS) effect and also show promising potentials as reliable SERS substrates for rapid detection of trace polychlorinated biphenyls (PCBs).
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MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Di Xu,Lingfeng Duan,Wenlin Jia,Guohai Yang,Yingqiu Gu
Noble metal nanoparticle aggregates are attracting increasing interest as SERS active substrates for the ultrasensitive detection of environmental and biological samples. Deposition of noble metal nanoparticles on magnetic metal oxide is an effective way to not only realize the assembly of noble metal particles, but also enrich analytes in highly diluted solution. Herein, Ag@Fe 2 O 3 hybrid was prepared by a simple method and applied for sensitive and recyclable SERS detection. The low detection limit of R6G (LOD = 9.3 × 10 −10 M) and CV (LOD = 1.7 × 10 −9 M) demonstrated the excellent sensitivity for SERS application. The high stability during long-term detection illustrated the super detection capability of the Ag@Fe 2 O 3 hybrid substrate. The synergistic effect of the electromagnetic enhancement originated from nanogaps between densely and closely distributed Ag nanoparticles, the chemical enhancement from semiconductor material of Fe 2 O 3 and the magnetic enrichment of the analyte molecules was account for the excellent SERS performance of the Ag@Fe 2 O 3 substrate. As a result, the Ag@Fe 2 O 3 hybrid substrate was successfully applied to detect bilirubin in human blood and showed excellent detection ability (LOD = 2.3 × 10 −8 M).
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