COLLOIDS AND SURFACES B-BIOINTERFACES
·
2026
·
IF 5.9
Hanan Al-Fakeh,Hasan M. Sharhan,Zheng Nan Nan,Cao Hongjuan,Wu Lin
MAO of Ti–2.5Ag yields micro-porous TiO₂ with enhanced roughness and hydrophilicity. • MAO porous structure sustains sub-cytotoxic Ag⁺ multiphasic release over 7 days. • MAO + Ag surface reduces P. gingivalis biofilm despite enhanced hydrophilicity. • Protein leakage confirms Ag⁺–SH membrane disruption as the bactericidal mechanism. • Ti–2.5Ag + MAO offers dual infection resistance with osseointegration-safe surface. Titanium implants remain susceptible to bacterial colonization by Porphyromonas gingivalis , a keystone pathogen in peri-implantitis, and although silver (Ag) incorporation and micro-arc oxidation (MAO) have each been explored individually, their combined effect on low-silver titanium alloys against anaerobic oral pathogens remains poorly characterized. This study fabricated CP-Ti, Ti–2.5Ag (Ti+Ag), and MAO-treated Ti–2.5Ag (Ti+Ag+MAO) surfaces and evaluated their physicochemical properties and antibacterial performance against P. gingivalis over seven days. MAO generated a micro-porous TiO₂ oxide layer (32.6% porosity) incorporating phosphorus and silicon, significantly increasing roughness Ra = 0.0846 µm; p < 0.01) and hydrophilicity (contact angle: 36.33°–41.34°; p < 0.05) versus CP-Ti. Cumulative Ag⁺ release from Ti + Ag + MAO reached 0.844 ppb by day 7, approximately twice that of Ti + Ag (0.399 ppb; p < 0.05), following a multiphasic release profile. Against P. gingivalis , Ti + Ag + MAO achieved adherent bacterial inhibition exceeding 91% by day 7 (versus 73% for Ti+Ag), with dead-cell percentages rising from 57.56% to 76.25% (p < 0.001 vs. both comparators). Crystal violet and protein leakage assays confirmed sustained anti-biofilm activity and progressive membrane disruption (p < 0.01–0.001), consistent with the observed Ag⁺ release kinetics. These findings demonstrate that MAO synergistically amplifies the antibacterial efficacy of Ti–2.5Ag through combined anti-adhesive and sustained ion-release-mediated mechanisms, establishing Ti + Ag + MAO as a promising multifunctional strategy for reducing peri-implant infections.
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TALANTA
·
2026
·
IF 6.7
Yi Liu,Yinxia Yang,Jialin Liang,Lei Han,Qian Zhao,Jie Luo,Shi Gang Liu
Dual-mode sensing can enhance detection reliability by cross-validating results from distinct signals. Herein, a colorimetric and turbidimetric dual-mode sensing platform based on Cu 2 O@Ag nanozyme with robust oxidase-like activity is developed for point-of-use (POU) detection of demeton. The Cu 2 O@Ag efficiently catalyzes the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), producing concurrent absorbance and turbidity signals. Demeton blocks active sites and suppresses catalytic activity in a concentration-dependent manner. Based on the principle, two modes for POU testing of demeton are developed. The first mode is based on a smartphone-assisted colorimetric swab and shows a linear range of 50 - 4000 ng/mL with the detection limit of 0.190 ng/mL. The other is based on a portable turbidimeter and exhibits a linear detection range of 50 to 3000 ng/mL with a detection limit of 2.997 ng/mL. The approaches are successfully validated in real food samples including baby cabbage, lettuce, cilantro, and tea leaves. This work presents a rapid, low-cost, and instrument-flexible dual-mode sensing strategy for on-site analysis of demeton residue. Also, the dual-mode detection based on colorimetric and turbidimetric signals for the first time offers a novel insight for dual-mode sensing.
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ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Ze Zhang,Jiajun Lin,Mengwei Guo,Hangrui Zhang,Mingyuan Gao,Rongrong Deng,Cunying Xu,Qibo Zhang
Lead–silver (Pb–Ag) anodes in the zinc electrowinning industry face severe challenges of electrochemical corrosion and sluggish oxygen evolution reaction (OER) kinetics. Precoating a protective MnO2 layer is an effective strategy to enhance their performance. However, conventional MnO2 precoating processes require high temperatures (≥80 °C) and suffer from drawbacks such as poor coverage, loose structure, and insufficient active sites. This study proposes a novel low-temperature MnO2 coating strategy tuned by K+ intercalation, enabling the controllable fabrication of high-performance MnO2 coatings from zinc electrowinning waste electrolytes. The results reveal that introducing an appropriate amount of K+ modulates the redox behavior of Mn2+ and the electrochemical crystallization process, leading to the formation of a uniform MnO2 film on the Pb–Ag anode. The intercalation of K+ into the MnO2 lattice promotes the generation of abundant surface vacancies, which enhance the OER performance. This work presents a scalable solution for low-temperature coating of MnO2 film on Pb–Ag anodes, enabling efficient and clean zinc electrowinning, and opens a new avenue for designing energy-efficient MnO2-based anode materials through additive intercalation tuning.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Tao Liao,Dan Hou,Hao Huang,María Belén Camarada,Xiaoning Liao
Herein, a novel ratiometric molecularly imprinted electrochemical sensor (MIP-RECS) based on Ag nanoparticles (AgNPs) and ionic liquid (IL) co-modified Ti 2 NTx (AgNPs@Ti 2 NT x @IL) was developed for the determination of patulin (PAT). Firstly, the AgNPs@Ti 2 NT x @IL nanocomposite, was prepared by an in situ reduction and self-assembled method, and then, was cast on the glassy carbon electrode (GCE) to build an electrochemical interface with excellent conductivity and high surface area. After that, the MIP was deposited on the nanocomposite modified GCE by the electro-polymerization technique, with thionine (Thi) and PAT as functional monomer and template molecules. In the sensing platform, the oxidation peaks generated by Thi and AgNPs were used as reference and probe signal, respectively. The introduction of reference effectively eliminates the influence of the matrix effect. At the same time, the oxidation signal of the Ag probe is greatly improved by the high conductivity and large surface area of the AgNPs@Ti 2 NT x @IL nanocomposite. Therefore, the MIP-RECS presented a wide linear range, a very low low limit of detection (LOD), together with high selectivity and excellent repeatability. Additionally, the linearity ranges and LODs of the sensor can be controlled by the amount of Ag, highlighting its robustness in different types of real samples. Furthermore, this sensing model can be used to sensitively detect other residues with poor redox activity, such as imidacloprid and catechol, highlighting its versatility and universality.
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Small
·
2025
·
IF 12.1
Ruru Xiong,Min Zhou,Huishuang Li,Lijuan Wang,Guixia Ling,Peng Zhang
Due to hypoxia, excessive reactive oxygen species (ROS), dense bacterial biofilms, and complex inflammatory microenvironment, chronic diabetic wound healing presents a huge challenge. Currently, sustainable treatments for this multifaceted problem have not been found. Here, microalgae and silver (Ag)─fulvic acid (FA) NPs are used to develop a multinetwork hydrogel (C@Ag─KGCM) based on oxidized konjac glucomannan (OKG) for the treatment of diabetic chronic wound (DCW). The lower hydrogel carries microrobots of Chlamydomonas rheinhardtii (C. rheinhardtii) , which continuously release bio-oxygen under light irradiation to alleviate hypoxia in deep wound tissues. The upper layer carries Ag─FA NPs formed by Ag + and FA self-assembly chelation complex, which can effectively inhibit bacterial growth and remove bacterial biofilms through photothermal-therapy-based Near - Infrared (NIR) 808 nm. C. reinhardtii and Ag─FA NPs synergistically scavenge excessive ROS. Therefore, a new concept of “three-pronged strategies” that addresses multiple problems in the wound microenvironment of diabetic patients has been proposed. Histological analysis of wound tissues shows that the C@Ag─KGCM bilayer hydrogel can promote chronic diabetic wound healing and tissue regeneration, indicating promising potential for its treatment of DCW healing.
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Food Bioscience
·
2026
·
IF 6.2
Xifan Zhan,Xinying Wang,Md Mehedi Hassan,Fangling Jiang,Jiaying Xu,Yuan Zhang,Shanghua Li,Sha Zou,Hongfa Liu,Yi Xu,Quansheng Chen
Pesticide residues in tea pose significant health risks to consumers. This research focuses on developing a surface-enhanced Raman scattering (SERS) sensor using a solid-phase substrate made of Au@Ag@PVP nanoparticles (NPs), combined with machine learning chemometric techniques, for the rapid detection of trichlorfon, carbendazim, and clothianidin in tea. Au@Ag@PVP NPs were immobilized onto anodic aluminum oxide (AAO) filter membranes via vacuum filtration, yielding densely packed NPs that generate strong electromagnetic hot spots, thereby increasing SERS sensitivity. Raman spectra of tea infusions containing different concentrations of pesticides were acquired and analyzed using three machine-learning algorithms. Among these models, competitive adaptive reweighted sampling-partial least squares (CARS-PLS) demonstrated superior predictive performance, with Rc = 0.9950, Rp = 0.9942, and RPD = 9.2893 for trichlorfon; Rc = 0.9955, Rp = 0.9942, and RPD = 9.1010 for carbendazim; and Rc = 0.9981, Rp = 0.9957, and RPD = 9.7523 for clothianidin. This approach enables the rapid, quantitative detection of pesticide residues with minimal sample preparation and high sensitivity, representing a practical method for monitoring tea safety.
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Zhengdong Zhu,Xiaoyi Shi,Yating Feng,Meng He,Cheng Ye,Hongyang Zhou,Maofeng Zhang,Wei Zhang,Jianhua Li,Changlong Jiang
Conventional surface-enhanced Raman scattering (SERS) molecular detection are based on hard and brittle substrate, which are not suitable for in-situ detection of analytes adsorbed on nonplanar surfaces. Here, we report a simple biomimetic synthesis method to fabricate lotus leaf mastoid structured AgNPs micro/nanoarrays as reliable SERS substrate. By ideal replicating mastoid structure of lotus leaf into a flexible and transparent PDMS film, followed by depositing plasmonic AgNPs, a powerful chemical sensor with high sensitivity and multiplex detecting capability is demonstrated. The employ of periodic mastoid structure array endows the sensor with high signal repeatability (RSD ∼ 8.6 %), solving the general repeatability problem of SERS substrates. In addition, the detailed designed flexible and transparent PDMS substrate is capable of identifying trace analytes on curved surfaces with excellent durability. In the proof-of-concept experiment, a limit of detection (LOD) of (10 −5 M to 10 −7 M) was achieved on a portable Raman device for three common pesticides residues (thiram, fonofos and triadophos) on dendrobium leaves and stem according to the molecular fingerprint, indicating its excellent in-situ detection capability. Further, the multiplex detection ability of the Ag/PDMS film is also demonstrated by analyzing the mixture of four typical analytes. Benefiting from its high signal uniformity, this flexible Ag/PDMS substrate also showed good quantitative detection capabilities.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 14
·e53686
·
IF 3
Yanwei Zhang,Hong Wang,Yaru Liu,Baolong Niu,Wenfeng Li
Accurate measurement of hydrogen peroxide is of great significance in monitoring human diseases and environmental safety. At present, there are a variety of testing methods, among which the use of electrochemical sensors to accurately measure hydrogen peroxide has gradually become a research hotspot. In this article, phytic acid (PA) with dual functions of doping and cross-linking and HCl with strong ionization capacity was introduced as dopants to co-doping polyaniline, and polyaniline hydrogel with a three-dimensional network structure was prepared. The influence of the HCl/PA co-doping ratio on conductive polyaniline hydrogel (CPAniH) was explored. The synthesis process and mechanism of HCl/PA-CPAniH were analyzed and explained. In addition, the conductivity and mechanism of HCl/PA-CPAniH, as well as the hydrogel characteristics were characterized and studied. A new electrochemical sensor based on polyaniline hydrogel and silver nanoparticles was constructed to detect hydrogen peroxide. The sensor has a good linear relationship, a wide linear range, and a high-detection limit for H 2 O 2 . In addition, it also shows that HCl/PA-CPAniH is a good interface material for electrochemical sensors and has a certain application potential.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Linlin Sun,Yibing Feng,Kai Ma,Xiaohan Jiang,Zhengyang Gao,Jigang Wang,Nan Jiang,Xiaoshuo Liu
It is significant to realize the synergistic effect of single-atom sites and its support to obtain excellent performance photocatalysts. Here, single-atom silver (SAAg) is embedded into the hierarchical tremella-like carbon nitride (3DT-CN) by an efficient one-step reduction method. The photo-degradation mechanism of SAAg/3DT-CN for tetracycline (TC) is first proposed. And the synergistic effect to improve photocatalytic activity is also discussed in depth. Density functional theory (DFT) calculations and physicochemical characterizations reveal that the synergistic effect of SAAg and 3DT-CN has improved the absorption capacity of visible light, the binding energy with oxygen, charge transfer behavior and other properties. Electron spin resonance (ESR) and capture experiments validate the active species involved in the reaction. The first-order kinetic constant of TC degradation by SAAg/3DT-CN is 8.4 times and 3.8 times that of 3DT-CN and AgNP/3DT-CN in 75 min, respectively. This work provides a meritorious structure-activity strategy for the removal of refractory antibiotics.
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CHEMOSPHERE
·
2022
·
IF 8.943
Lina Wang,Hanpei Yang,Li Kang,Mi Wu,Yuankun Yang
In this work, Ag/AgCl/FeOCl (Ag–Fe) catalysts were successfully prepared via multistep routes in which Ag was uniformly anchored to the enriched Cl sites provided by exfoliated FeOCl nanosheets. Among these Ag–Fe catalysts, 5% Ag–Fe exhibited the highest pseudo first-order kinetic constant 0.1056 min −1 for photo-Fenton degradation of Rhodamine B (RhB), which was 11 times higher than that of FeOCl (0.0096 min −1 ). Ag–Fe catalysts exposed more coordinatively unsaturated Fe active sites to coordinate with H 2 O 2 due to the cleavage of Fe–Cl bond. The exposed coordinatively unsaturated Fe(III) active sites could capture the photoinduced electrons and reduce them to Fe(II), which boosted the separation efficiency of photogenerated charge carriers. Meanwhile, the photogenerated electrons of Ag 0 transferred to the FeOCl, promoting the reduction of Fe(III) to Fe(II). In addition, the intensified visible light adsorption (SPR effect) was achieved after introducing Ag/AgCl nanoparticles on exfoliated FeOCl. Hydroxyl radicals (·OH) and holes (h + ) were determined as the main reactive oxidative species (ROS) in the photo-Fenton degradation process.
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TALANTA
·
2022
·
IF 6.556
Haoyang He,Da-Wen Sun,Hongbin Pu,Zhihui Wu
Food aflatoxin B1 (AFB1) contamination greatly threatens human health and its sensitive determination is imperative. In this study, a surface-enhanced Raman scattering (SERS) and fluorescence dual-signal aptasensor was constructed for sensitive AFB1 detection in peanuts, walnuts, and almonds samples. Fluorescent dye cy5 was used as fluorophore and Raman reporter, while polyethyleneimine modified Ag coating magnetic nanoparticles (MNP@Ag-PEI) were utilized to absorb the cy5 modified aptamer (apt-cy5). Results indicated that linear ranges of 0.001–1000 ng/mL and 0.2–20,000 ng/mL with detection limits of 0.45 pg/mL and 0.135 ng/mL for the SERS and fluorescence methods were obtained, respectively, and AFB1 detection in the nut samples using the aptasensor achieved satisfactory recoveries of 95.2%–108.6% for SERS and 94.7%–109.7% for fluorescence. Compared with other mono signal detection, the established aptasensor facilely fused the merits of the two signals and improved the detection accuracy and flexibility.
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International Journal of Smart and Nano Materials
·
2022
·
IF 4
Guannan Yang,Shaogen Luo,Bo Luo,Yan Zuo,Shiwo Ta,Tingyu Lin,Zhaohui Zhao,Yu Zhang,Chengqiang Cui
Conductive fillers made from metal nanoparticles offer many advantages for the fabrication of a variety of electronic devices, but when they have a porous structure, their poor conductivity limits their adoption in many applications. In this study, an Ag-coated Cu micro-nanoparticle paste is used to achieve compact filling of blind vias on flexible copper clad polyimide laminates through a multistep filling and sintering technique. The filled blind vias achieve a resistivity as low as 6.2 μΩ·cm, which is comparable that of electroplated blind vias. Higher sintering pressure and temperature promote the filling performance, while the conductivity deteriorates at a via depth/diameter ratio greater than 1:1. Finite element simulations reveal a stress inhomogeneity in vias with large depth/diameter ratios, which is the key to understanding the evolution of the conductive properties of a paste-filled via. This study provides an effective method for high-performance microvia filling as well as insights into the mechanism that influences its performance.
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