Journal of Materials Chemistry B
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2025
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IF 5.7
Yajie Cheng,Yadong Chen,Chang Shu,Chenying Zhou,Zhenzhen Zhang,Yan Tu,Qiaojie Luo,Xiaodong Li
As the most widely used material for dental tissue repair, dental resin composites face durability challenges, whose longevity critically depends on the hybrid layer's integrity. Incomplete adhesive infiltration within the demineralized dentin matrix (DDM) creates structural defects in this layer, rendering it vulnerable to stress concentration, enzymatic degradation, and bacterial invasion. These factors contribute to secondary caries, the predominant complication of resin-based restorations. Enhancing both adhesive infiltration and the hybrid layer’s antibacterial capacity is thus pivotal to extending restoration lifespan. Previous studies revealed that strong metal ion chelation can mobilize confined water to facilitate hydrophobic monomer infiltration, significantly improving dentin bonding efficacy and durability. In this study, leveraging the dual advantages of Ag⁺—potent chelation and antibacterial activity—we treated DDM with Ag⁺. A brief 20-second application enabled confined water release, enhanced adhesive infiltration, and conferred durable antibacterial functionality to chemically modified DDM. Additionally, matrix metalloproteinases (MMPs) activated during bonding were effectively inhibited. Crucially, subsequent light irradiation reduced Ag⁺ to metallic silver, enhancing structural stability by orders of magnitude. This approach successfully established a low-defect hybrid layer with intrinsic, long-lasting antimicrobial properties. The strategy offers a clinically viable solution for achieving durable dentin restoration with integrated antibacterial defense.
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MATERIALS CHEMISTRY AND PHYSICS
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2025
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IF 4.7
Jiamin Fang,Dexin Chen,Xiaojing Fang,Peng Zhang,Jing Sang,Hidetoshi Hirahara,Sumio Aisawa,Wei Li
Introduction of hard phases into soft metal coatings is a widely used strategy to improve the tribological behavior and antiwear properties during current-carrying friction. In this work, we developed silver (Ag) composite coatings reinforced with nanodiamonds (NDs) using a self-devoloped rotating spray deposition technology. The composite coatings, with a 0–10 g/L rage concentrations of NDs, were comprehensively characterized for morphology, chemical composition, hardness, and current-carrying tribological behavior and antiwear properties. Thanks to the unique advantages of our fabrication technique, the coatings show a dense structure with strong interfacial bonding both at the coating-copper substrate interface and between the Ag matrix and NDs in composite coatings. The addition of NDs not only maintains excellent electrical conductivity (minimum 98.1 %ICAS) but also boosts microhardness to 169 HV. Uniformly dispersed NDs effectively enhance the tribological behavior and wear resistance, keeping the friction coefficient stable at 0.1–0.2 and reducing the wear rate significantly with the shallowest wear track measuring only 6 μm. Finally, the worn subsurface structure of wear tracks was analysized to confirm the good bonding between NDs and the Ag matrix, as well as the dispersion-strengthening effect of NDs within the Ag matrix and the plastic deformation mechanism of Ag during current-carrying friction. This study not only enriches the enhancing mechanism in hard-phase-reinforced composites but also provides new insights and approaches for the development of electric contact coating materials.
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ANALYTICA CHIMICA ACTA
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2014
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IF 4.517
Yanlin Lv,Lili Zhu,Heng Liu,Yishi Wu,Zili Chen,Hongbing Fu,Zhiyuan Tian
A new type of fluorescent probe capable of detecting Ag + and Hg 2+ in two independent channels was developed in the present work. Specifically, in CH 3 CN–MOPS mixed solvents with CH 3 CN/MOPS ratio (v/v) of 15/85, this type of probe fluoresced weakly, and the addition of Ag + remarkably induced fluorescence enhancement of the probe. In CH 3 CN–MOPS mixed solvents with the percentage of CH 3 CN increased up to 65%, the probe was highly fluorescent and addition of Hg 2+ dramatically induced the fluorescence quenching. Thus, using such single-fluorophore-based probe and tuning the polarity of the mixed solvent, Ag + , and Hg 2+ can be detected in independent channels with high selectivity and sensitivity. As a result, the mutual interference usually encountered in most cases of Ag + and Hg 2+ sensing owing to the similar fluorescence response that these two ions induced, can be effectively circumvented by using the probes developed herein.
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ENERGY & FUELS
·
2025
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IF 5.3
Yaqi Wang,Ying Zhang,Yuanfeng Wang,Yahe Zhang,Chunming Xu,Zhiming Xu,Quan Shi,Linzhou Zhang
The characterization of olefin compounds is crucial for elucidating the reaction network in thermal cracking processes. In this study, heavy olefins were selectively characterized by using Ag+ complexation electrospray ionization coupled with high-resolution Orbitrap mass spectrometry. Semiquantitative analysis of the olefin content was conducted using naphthalene-d8 as an internal standard. In thermal cracking products, heavy olefins with carbon numbers ranging from C10 to C50 were detected, with a concentration peak observed in the C20–C25 range. Linear monoalkenes were found to be the most abundant species. The molecular composition of olefins in cracking products under various reaction conditions was investigated, and based on these findings, the thermal cracking reaction network was analyzed. Furthermore, the correlation between the olefin content and the bulk properties of the thermal cracking products was well correlated. This study provides valuable insights into the complex reaction network involved in the residual thermal cracking process, thereby providing a theoretical foundation for process optimization.
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CRYSTENGCOMM
·
2025
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IF 2.6
Penghui Wei,Jiajia Song,Haibin Tang,Qinglin Shi,Yongqing Ma,Ganhong Zheng,Meiling Wang,Sajid Imran,Muhammad Usman Amin,Yilin Lu,Chuhong Zhu
In this study, we present a simple and facile synthesis approach to fabricate highly sensitive surface-enhanced Raman scattering (SERS) substrates by electrodeposition of silver (Ag) nanostructures into aluminum oxide (Al2O3) honeycomb microchannel periodic arrays (HMPAs). The spatial confinement and morphology of Ag nanostructures was precisely tuned by varying different deposition parameters. The SERS performance of the as prepared Ag nanostructures were evaluated. The hierarchical flower-like Ag nanostructures demonstrated the highest Raman signal enhancement as compared to other nanostructures electrodepsosited in the HMPAs. The densely packed network of plasmonic "hot spots" generated by the hierarchical flower-like Ag nanostructures, as well as the confinement of analyte molecules near the metal surface in Al2O3 HMPAs, are responsible for Raman signal enhancement. The hierarchical flower-like Ag nanostructure array achieved a limit of detection (LOD) of 9.3 × 10⁻11 M for rhodamine 6G (R-6G) and an enhancement factor (EF) of 6.99 × 107. This work highlights the significance of nanostructure’s precision over a large area and spatial confinement of analyte molecules in or near "hot spots", for enhanced SERS sensitivity and broad applicability in chemical analysis.
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ACS Sustainable Chemistry & Engineering
·
2025
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IF 7.3
Shumiao Zhang,Guangyao Fan,Ruiying Xie,Roberto Castro-Muñoz,Xiaoquan Feng,Dongyang Li,Xuerui Wang,Yatao Zhang,Meixia Shan
Covalent organic frameworks (COFs) are promising fillers for mixed-matrix membranes (MMMs) in gas separation due to their purely organic nature and tunable porosity. However, the inherently large pore sizes of most COFs limit propylene/propane selectivity solely on size sieving. Therefore, we employed a postsynthetic modification strategy to introduce Ag+ ions to the β-ketoenamine linkage carboxylic acid COF (TpDAT) framework to tailor the pore environment and facilitate propylene transport. The resulting TpDAT-Ag/6FDA-TMPDA MMMs achieved a synchronous improvement in the C3H6 permeability and C3H6/C3H8 ideal selectivity compared to the pure 6FDA-TMPDA membrane. The best performance of MMMs (10 wt % loading) demonstrated a C3H6 permeability of 142 Barrer and a C3H6/C3H8 ideal selectivity of 15, outperforming the performance of most polymer-based membranes. Density functional theory calculations further confirmed the favorable interaction between the C3H6 molecules and TpDAT-Ag. The outperforming separation performance together with the long-term stability renders this Ag+-modified COF a promising candidate in MMMs for C3H6/C3H8 and other gas separations.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 36
·2260
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IF 2.8
Dong Hongyu,Liang Zhenhui,Xu Qinchao,Zhao Liangfu
A binary micro-nano graded silver-based low temperature conductive composite paste was developed for printing conductive patterns on flexible substrates.The conductive phase includesmulti-scale flake and spherical silver powders, with bisphenol F epoxy resin as the binder. Butyl butyrate, 2-(2-butoxyethoxy) ethanol, and diethylene glycol monobutyl ether acetate were selected as organic solvents. Using DSC, TG, surface morphology, viscosity, and resistivity analyses, we investigated the effects of these solvents with different boiling points on the conductivity and curing behavior of the low temperature paste. After screen-printed onto polyimide film, the paste demonstrated low resistivity (3×10 –5 Ωˑcm) and robust mechanical stability.Its resistance increased from 1.4 Ω to only 1.5 Ω after 3000 bending cycles. The adhesion strength of the printed pattern was assessed via a tape test.The pasteshowedgood comprehensive performance, when applied in thin-film switches and light-emitting logo devices. These results highlight its potential for flexible electronicsapplications and provide valuable insights for advancing flexible conductive circuits.
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Nanomaterials
·
2025
·Vol. 15
·期 11
·778
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IF 4.3
Weimin Ning,Mingxuan Li,Lei Jiang,Mei Yang,Maoyan Liu,Yong Liu
Bacterial leaf blight (BLB) is a destructive disease caused byXanthomonas oryzae pv. oryzae(Xoo). It has been proven that BLB adversely influences the growth and production of rice, resulting in substantial losses in yield. Nanoparticle–antimicrobial compounds possess excellent physicochemical properties, which have generated groundbreaking applications in protecting rice against BLB attacks. However, there is less research focused on the interaction between nanoparticles and the microbiome of BLB rice leaves, particularly the structure and function of endophytic bacteria, which are essential to plant health and pathogenesis. Therefore, the study explored how Cu-Ag nanoparticles influenced the endophytic bacteria’s composition and functions in healthy and BLB rice leaves. The data demonstrated that the relative abundance of beneficial bacteria,Burkholderiales,Micrococcales, andRhizobiales, increased after the introduction of Cu-Ag nanoparticles on the leaves of BLB rice. The examination of PAL activity demonstrated that nanoparticles limited the spread ofXooin rice leaves. Furthermore, endophytic community functional prediction demonstrated that nanoparticles may regulate the physiological process associated with potential stress resistance and growth-promoting function in the endophytic communities. This investigation may enhance the understanding of interactions between nanoparticles and the composition of rice endophytic microbiome, which can contribute to the exploration and application of nanomaterials in crop pathogen management.
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FUEL
·
2025
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IF 7.5
Asmat Ullah,Gang Dong,Yasir Javed,Anosha Anwer,Dongsheng Geng
The Cu-based catalyst used for electrochemical CO 2 reduction reaction (CO 2 RR) is a capable approach to reducing greenhouse carbon emissions and producing high value-added multi-carbon (C2 + ) products. Unfortunately, the selectivity of the (C2 + ) products is still quite low. Therefore, it is imperative to develop persuasive electrocatalysts to facilitate the conversion of carbon dioxide into valuable chemical products. Here, we design a CuO Nanosheets catalyst with the phase composition of silver (Ag) and Ag metal–organic framework (Ag-MOF) by using the hydrothermal approach. A maximum ethylene faradaic efficiency (FE) of Ag-MOF/CuO NS is achieved as 45.72 % at −1.1 V (vs RHE), while those CuO NS and Ag/CuO NS show 31 % and 14.24 % respectively. Interestingly, the restructured porous nature of Ag-MOF doped CuO NS electrocatalyst is equipped with a high surface area with strong adsorption capacity of CO 2 and increases the oxygen vacancies abundance with high active sites for selective electrocatalysis activity based on as produced Ag-MOF on CuO surface. This indicates that, in heterostructured catalysts, the coordination between CuO and free carboxyl groups considerably can enhance the dimerization of *CO intermediates and provide a strong coordination environment to the Cu valence state with MOF for the selective electrocatalytic CO 2 reduction. Thereby, the reaction pathway is shifted from two electrons to a multi-electron by constructing the oxygen vacancies for the production of multi-carbon products.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Chen Zhang,Chuan Ding,Mingyue Li,Jinyang Zhou,Tao Yuan,Zhemin Shen
The infrared energy of the sun’s rays accounts for more than 40 %. Heterostructures were constructed to enable broad-spectrum response of photocatalysts, and enhance the utilization of sunlight, especially that of infrared lights. A robust heterostructured upconversion composite material decorated with Ag nanoparticles (AgNPs), β-NaLuF 4 @ NaLuF 4 :Yb 3+ ,Tm 3+ @ AgNPs@BiOBr (NLF@NLFT@Ag@Bi), was built through a multi-step hydrothermal method. NLF@NLFT@Ag@Bi demonstrates enhanced photocatalytic activity under UV–Vis-NIR, Vis-NIR, and NIR irradiation compared to pure BiOBr and NLF@NLFT@Ag/BiOBr mixture, achieving 99 % Rhodamine B (RhB) degradation in 0.5 h (UV–Vis-NIR) and 96 % in 3 h (NIR), with degradation over 80 % for Bisphenol A (BPA), Norfloxacin (Nor), and Methyl Orange (MO) in 3 h (UV–Vis-NIR). The upconversion luminescence (UCL) of NLF@NLFT@Ag is tuned by its core–shell structure and AgNPs’ plasmonic effect, while NLF@NLFT@Ag@Bi’s enhanced photocatalysis arises from boosted UCL and AgNPs-facilitated Förster resonance energy transfer (FRET) between NLFT and BiOBr. The material’s efficacy in infrared-driven photocatalysis offers a prospective approach for extending catalyst response ranges. It greatly enhances degradation effects of organic pollutants under sun’s rays.
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Applied Materials Today
·
2025
·
IF 6.9
Longfang Ren,Fangfang Dong,Xiaodong Gao,Sijie Yu,Taotao Qiang
The flexible ammonia sensor can detect the ammonia content in the air or the exhaled gas of humans, but the commonly used sensors have poor breathability and washability, so they are not suitable for direct contact with human skin. In this work, based on the excellent flexibility and permeability of nonwovens, UiO-66-NH 2 /MoS 2 @nonwoven (UMN) and UiO-66-NH 2 /MoS 2 /Ag@nonwoven (UMAN) gas sensors were prepared by loading self-prepared UiO-66-NH 2 /MoS 2 (UM) and UiO-66-NH 2 /MoS 2 /Ag (UMA) onto microfiber nonwovens. The results show that UMN and UMAN gas sensors exhibit high selectivity toward ammonia gas. The response values of UMN and UMAN demonstrate a consistent linear trend within the ammonia concentration range of 1–50 ppm and reach 43 % and 47 % at 1 ppm respectively. The response variations of the sensors before and after bending are below 4 %, demonstrating excellent bending stability. After washing for 24 h, the gas sensing performance shows nearly no change, indicating that they both have good reusability and washability. However, the sensors exhibit limited thermal and humidity stability. Given the challenges such as poor breathability and insufficient biocompatibility faced by traditional flexible gas sensors, UMN and UMAN sensors have emerged as highly promising alternatives with distinct advantages.
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PROGRESS IN ORGANIC COATINGS
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2025
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IF 7.3
Yuan Jing,Fandi Meng,Fuhui Wang,Li Liu
Slippery liquid-infused porous surface (SLIPS) has garnered significant attention in marine anticorrosion and antifouling applications due to their slippery attributes. Nevertheless, it remains challenging to fulfill the protection requirements by relying exclusively on the barrier and anti-adhesion mechanisms of surface lubricating layer. In this work, a dual-functional slippery organogel coating was meticulously synthesized by introducing Ag(Ӏ)-imine coordination bonds into organosilicon networks, thereby endowing the coating with self-healing and antibacterial properties. A surface scratch with a width of 50 μm can be effectively repaired within 6 h at 60 °C, and the repair efficiency exceeds 85 %. In addition, the coating exhibits a dual antibacterial mechanism, which functions through both sterilization via the release of Ag + and antiadhesion due to its slippery properties. Following a 7-day cocultivation period with PAO1 bacteria, the coating retained 100 % bactericidal activity and 99.8 % resistance to bacterial adhesion. Moreover, the antialgal efficacy of the AP-TA 0.2 -Ag 1 @Oil coating against Chlorella and P. tricornutum increased by 99.9 % and 99.7 %, respectively. Furthermore, the combination of Ag(Ӏ)-imine coordination bonds and silicone oil effectively preserves the corrosion resistance of the coating. The EIS results demonstrated that the | Z | 0.01 Hz value of the slippery organogel coating was maintained at 1.07 × 10 7 Ω·cm 2 after immersion in 3.5 wt% NaCl solution for 14 days, suggesting excellent anticorrosion performance of the coating. This study provides a novel perspective for the development of marine protective coatings that possess antifouling, self-healing, and anticorrosive properties.
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