SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Qingyan Han,Hao Zhang,Andrey Kaplan,Shixing Fan,Yazhou Xu,Chengyun Zhang,Wei Gao,Enjie He,Jun Dong
Surface-enhanced Raman scattering (SERS) with ultrahigh sensitivity has garnered significant attention for quantitative analysis and chemically specific detection. However, conventional SERS platforms, typically structured by depositing plasmonic micro/nanoparticles onto rigid substrates, face limitations in further advancement and applications. In this study, we present a novel method to prepare a flexible SERS film substrate composed of graphene overlayer (G) atop a self-assembled array of silver micropopcorns (Ag MPs) and a polymethyl methacrylate (PMMA) membrane. We show that adding an overlayer of graphene improves substantially overall SERS performance. This flexible G/Ag MPs/PMMA film substrate achieves a detection limit as low as 100 picomolar for rhodamine 6G (Rh6G) molecules and identifies mixtures containing Rh6G (10 −11 M) and crystal violet (CV, 10 −6 M) molecules. Furthermore, the flexible SERS structure enables quantitative detection of thiram, achieving a detection limit of 0.005 ppm, well below the allowable limit in food. This study provides a robust SERS platform that advances fundamental research and facilitates the development of practical applications in quantitative analysis, detection, and biological sensing. Combining graphene and Ag MPs on a flexible PMMA substrate offers a versatile and scalable approach to enhancing SERS performance, paving the way for future innovations.
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ADVANCED POWDER TECHNOLOGY
·
2025
·
IF 4.2
Xinyu Cai,Yiduo Chen,Dandan Wang,Zhongming Su,Weiting Yang
Here, a biomass-based composite interfacial evaporation system utilizing a Ti-MIL-125-NH 2 /Ag (Ti-MIL-125/Ag; MIL-125/Ag) catalyst was successfully developed, which innovatively achieved synergistic enhancement of photothermal conversion and photocatalytic degradation. Initially, the precisely engineered Ag nanoparticles-modified Ti-MIL-125-NH 2 significantly enhanced visible-light absorption capacity and charge carrier separation efficiency. Furthermore, a Bam@MIL-125/Ag three-dimensional porous interfacial evaporator was constructed using eco-friendly and low-cost bamboo substrate through the sodium alginate gelation. At a height of 1.5 cm, 5 wt% of Ag loading, and a content of 20 mg of Ti-MIL-125/Ag in the Bam@MIL-125 evaporator, the Bam@MIL-125/Ag system under 1 kW·m −2 simulated sunlight demonstrated an evaporation rate of 1.45 kg·m −2 ·h −1 and a solar-to-vapor conversion efficiency of 81.2 %. Notably, leveraging photo-generated free radicals from Ti-MIL-125/Ag, the Bam@MIL-125/Ag evaporator achieved efficient removal (98.67 %) of volatile organic compounds (VOCs) in water through the photocatalytic degradation process. Furthermore, when operating continuously for 56 h in a 3.5 wt% NaCl solution, the Bam@MIL-125/Ag evaporator maintained an evaporation rate above 1.4 kg·m −2 ·h −1 , demonstrating excellent stability, salt resistance, and heavy metal removal capabilities in practical applications. This work provides an innovative strategy for designing MOF-based evaporators that combine high-performance water production with advanced purification functionality.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Chuangxin Huang,Xin Liu,Zhan Gao,Shangwan Fu,Jianli Meng,Qi Chen,Qiuliang Wang
Titanium (Ti) implants face significant challenges due to bacterial infections and thrombosis caused by surface biofouling, often leading to implantation failure. Hence, we developed an accelerated codeposition strategy to functionalize Ti surfaces with zwitterionic poly(sulfobetaine methacrylate) (PSBMA) and silver nanoparticles (AgNPs) for enhanced antibiofouling and antibacterial properties. In this approach, AgNO3 served a dual role: (1) as an oxidant to accelerate dopamine polymerization and PSBMA codeposition, reducing reaction time from 24 to 4 h and (2) as a precursor for in situ synthesis of uniformly distributed AgNPs via phenolic hydroxyl reduction. The optimized Ti/PDA–PSB@Ag0.15 coating exhibited superior and robust antibacterial performance, achieving >99.9% inhibition against both E. coli and S. aureus, while the cytotoxicity assays confirmed high L929 fibroblast viability (>90%), ensuring biosafety. In addition, the zwitterionic polymer contained in the Ti/PDA–PSB@Ag0.15 coating provided superhydrophilicity and outstanding protein resistance, reducing 85% of both bovine fibrinogen (BFG) and bovine serum albumin (BSA) adsorption compared to unmodified Ti. Finally, the modified Ti substrates demonstrated minimal hemolysis ratio (<3%), reduced platelet adhesion, and prolonged activated partial thromboplastin time (APTT), indicating excellent hemocompatibility and strong anticoagulant properties. Thus, this work presents a rapid, scalable method to engineer multifunctional Ti implants with synergistic antifouling and bactericidal capabilities, offering significant potential for clinical applications in orthopedic, dental, and cardiovascular devices.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 10
·1-9
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IF 5.3
Feng Qianqian,Zhou Jiang,Wang Lingfeng,Gong Xiaojiao,Xi Qiang,Yang Shengyuan,Du Wenfang,Xiao Fubing
An Ag + -functionalized structural color hydrogel (Ag + -SCH) sensor is constructed for colorimetric detection of glutathione (GSH). The hydrogel is prepared by using the coordination of Ag + and 1-vinylimidazole (1-VI) as cross-linking network. GSH acts as a competitive ligand to break the coordination between Ag + and 1-VI, leading to the expansion and structural color change of the hydrogel. Quantification was achieved by measuring particle spacing changes, yielding a dynamic range of 0.1–200 μM with a limit of detection (LOD) of 0.04 μM. Alternatively, smartphone-based hue analysis enables sensitive GSH detection with a LOD of 0.79 μM. The sensor has proven to show high selectivity, excellent reusability, and long-term stability. In human serum tests, the Ag + -SCH performed comparably to commercial kits, while offering significantly lower cost. This portable, low-cost platform meets practical needs for GSH monitoring in diverse settings. Graphical abstract
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Jiawei Yan,Biao Zhao,Min Li,Zuxing Zhang,Aoqun Jian,Yingxian Xue
Early and accurate detection of alpha-fetoprotein (AFP) is critical for the diagnosis and monitoring of hepatocellular carcinoma and other malignancies, However, conventional immunoassays often suffer from limited sensitivity, narrow dynamic range, and complex sample preparation. In this study, we developed a photoelectrochemical (PEC) biosensor based on Au Ag alloy nanoparticles/TiO 2 /Au (AATA) nanocomposite films, which exhibits low background noise and exceptional sensitivity for the quantitative detection of AFP. AATA nanofilms with varying component ratios were fabricated via a combination of magnetron sputtering and spin coating. The synergistic effect of localized surface plasmon resonance (LSPR) from noble metals, plasmonic coupling between the Au film and alloy nanoparticles, and the enhanced hot electron injection efficiency of Au Ag alloy nanoparticles (Au Ag ANPs) significantly improved the PEC performance of the electrode, leading to enhanced photocurrent signals. Under optimized conditions, The PEC biosensor showed a linear response between the photocurrent change and the logarithm of C AFP in the range of 0.1 ng/mL to 1000 ng/mL, with a detection limit as low as 4.54 pg/mL. Additionally, the fabricated biosensor demonstrated excellent sensitivity, stability, and reproducibility, providing a promising analytical platform for the clinical detection of AFP in human serum.
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LANGMUIR
·
2024
·
IF 3.7
Zhenmin Wu,Jie He,Guoyu Zhao,Xiaoyan Tang,Junqing Li,Wenhang Chen,Ruiqi Li
The current membrane materials used for oil–water separation suffer from low separation efficiency and poor durability, and membrane contamination is also a key issue that must be addressed urgently. In this paper, a superhydrophilic PANI/Ag/TA@PVDF composite membrane with PANI-Ag NPs heterojunction structure was prepared via chelation and reduction of Ag+ by tannic acid (TA) and in situ growth of hydrochloric acid-doped polyaniline (PANI). TA endows the prepared composite membrane with excellent superhydrophilicity and underwater oleophobicity, remarkable oil–water separation capacity (the separation efficiency of more than 97% for soybean oil), and extraordinary antifouling properties. Notably, the range of photodegradation is expanded from UV to visible light by the construction of a Schottky heterostructure between PANI and Ag NPs, the photocatalytic degradation ability of composite membrane for organic pollutants has been improved obviously, and the degradation efficiency for crystal violet (CV) is 97.9%. Considering these merits, the PANI/Ag/TA@PVDF composite membrane provides an effective strategy to overcome the shortcomings of existing membrane materials, presenting enormous potential in the treatment and purification of oily wastewater.
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ChemNanoMat
·
2024
·
IF 2.6
Xue Qi,Hao Lv,Yuxin Wang,Yang Ye,Peike Wang,Ao Yin,Jingjing Luo,Haipeng Liu,Zhongqi Ren,Jiang Liu,Suzhu Yu,Jun Wei
Flexible sensors, being a vital component of flexible devices, determine the functionalities and performance capabilities of the devices., especially, are widely used in flexible sensors in past research due to their great advantages in flexibility and sensitivity. In this work ， silver nanowires with aspect ratios of 600, 1000, and 1400 were synthesized by adjusting the synergy of Br– and Cl–, along with other process parameters, leading to an improved production efficiency of silver nanowires. The stability of the conductive network is enhanced when the aspect ratio of silver nanowires is 1000 and 1400.The sensor demonstrated high sensitivity at high strain, along with an extended strain range. Moreover, it was observed that increasing the aspect ratio of silver nanowires led to a more stable conductive network, thus enhancing the sensor's stability with over 10000 stretching cycles. under the appropriate deposition density, silver nanowires with aspect ratio of 600 have high sensitivity to low strain, and silver nanowires with aspect ratio of 1400 have high sensitivity to high strain, up to 247.3. Introducing microstructures on the surface of PDMS resulted in an increased maximum sensitivity of the sensor with decreasing microstructure size, reaching a maximum sensitivity of 322.2.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jiawei Wang,Ruirui Qiang,Qiaowei Miao,Ruiling Hu,Huihui Chen,Shaobo Guo,Zhifeng Liu
With antibiotic resistance on the rise due to misuse, the urgent need for new antibacterial materials has become paramount in global health. Herein, a CuFe 2 O 4 /MoS 2 (CFM) composite with a large specific surface area was synthesized through a simple hydrothermal method and physical adsorption, and the subsequent loading of silver nanoparticles (Ag NPs) onto its surface yielded the nanocomposite CuFe 2 O 4 /MoS 2 @Ag (CFMA) with a rough defect-rich surface. The nanocomposite demonstrates remarkable antibacterial activity against Escherichia coli , Staphylococcus aureus , and drug-resistant Salmonella ( T-Salmonella ) by releasing metal ions that alter the electrical potential of bacterial cell membranes, compromise the integrity of cell membranes, and produce reactive oxygen species that lead to oxidative stress. It thus achieves an antibacterial rate of 96 % against the three tested bacterial strains within just 20 min at a concentration of 200 μg/mL. The composite exhibits a broad-spectrum antibacterial effect against Gram-negative and Gram-positive bacteria, as well as drug-resistant bacteria. Moreover, CFM acts as a carrier that effectively prevents the aggregation of Ag NPs, and the magnetism of CuFe 2 O 4 facilitates the recovery of the antibacterial agent. This work provides new ideas and methods for the development of highly efficient, cost-effective, and biocompatible antibacterial materials.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Yi-Hong Yu,Xin Cui,Yi-Meng Hong,Gao-Wu Qin,Song Li
Incorporating electrochemical CO 2 reduction (ECR) that produces CO-rich syngas into the workflow of steelmaking presents a promising strategy to neutralize the steelmaking industry. Herein, we develop a highly efficient and stable Ag nanowires with surface CeO 2 armors (CeO 2 /AgNWs) as ECR electrocatalyst for syngas production. The engineered CeO 2 -Ag interface facilitates CO 2 -to-CO conversion by lowering the energy barrier for *COOH intermediate formation through synergistic electronic effects. At an industrially relevant current density of −251.3 mA cm −2 , the CeO 2 /AgNWs generate CO-rich syngas by co-electrolysis of CO 2 and H 2 O, with a high Faradaic efficiency (FE) of 92.1 % for CO. Techno-economic analysis (TEA) reveals that integrating the CeO 2 /AgNWs-driven ECR into existing steelmaking workflows can potentially reduce CO 2 emissions by 83 % and elevate the renewable energy utilization to ∼91.4 %, unlocking new possibilities for achieving carbon neutrality in the steel industry.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Ziyu Liu,Huanrui Liu,Daofu Zhang,Yongsheng Li,Fangfang He,Zhuoni Jiang,Hongxia Yang,Xinghua Zhu,Wenbin Yang
By intelligently modulating the thermal energy exchange between the skin and the environment, phase change fabrics are important for improving the thermal comfort of the wearer, saving energy, and expanding the functionality of smart textiles. In this study, paraffin@SiO 2 @Ag phase change microcapsules (M s ) were tightly encapsulated in calcium alginate (CA) matrix using wet spinning process. CA/M s phase change composite fibers with different mass ratios were designed. When the CA/M s mass ratio was 1:1, the CA/M s phase change enthalpy ΔH m was 64.3 J/g, and the maximum tensile strength was 1.27 MPa, along with excellent thermal stability and photothermal conversion efficiency. In addition, the introduction of different contents of carbon nanotubes (CNTs) into CA/M s could improve the thermal conductivity and photothermal conversion efficiency. When the cont1ent of CNTs was 10 phr, the thermal conductivity of CA/M s /CNTs (CMC) was increased by 159 %. Therefore, these phase change composite fibers with excellent photothermal efficiency offer new possibilities for the exploitation of smart fabrics and are anticipated to have a significant role in the area of smart textiles.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ping Zhang,Qing Sui,Zhiqiang Liu,Chengyv Hu,Chunjing Li,Xiaodan Guo,Jinhui Wang,Guofa Cai
The stretchable electrochromic modulator is one of the most promising energy-saving optoelectronic devices that can be integrated into smart portable and wearable electronics. A lot of focus has been on developing transparent conductive electrodes of stretchable electrochromic modulators, but they generally suffer from poor chemical stability, low photoelectric balance, and unsatisfactory deformability. To address this challenge, we first develop Ag@Au nanowires (NWs) micromesh-based stretchable transparent conductive electrodes (STCEs) using a self-assembled approach, which displays superior photoelectric performance (8.5 Ω sq -1 with a transmittance of 81.5 %), good chemical stability in harsh electrolyte environment (acidic and alkaline) as well as robust mechanical stability (bending, folding, stretching and twisting). As a demonstration, the grown WO 3 on Ag@Au NWs-based STCEs can deliver good electrochromic stability even after bending over 1000 cycles and stretching to 50 %. Moreover, highly soft Zn//WO 3 and polyaniline (PANI)//WO 3 electrochromic modulators were assembled using flexible Ag@Au micromesh STCEs, which still retain uniform electrochromism in neutral and acidic electrolytes respectively. Definitionally, the strategy of in-situ grown Au shell on the surface of AgNWs micromesh provides an innovative solution to fabricate high-performance STCEs for the related portable smart wearable electronic devices.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Khak Ho Lim,Yuxuan Xia,Lixiang Xu,Mingjun Zhao,Mingquan Li,Ye Cheng,Jiale Mao,Shuang Wang,Lei Chen,Sai Wing Tsang,Pingwei Liu,Qingyue Wang,Xuan Yang,Wen-Jun Wang,Andreu Cabot,Min Hong,Yu Zhang,Yu Liu
Ag 2 Se has emerged as a promising thermoelectric (TE) material for room-temperature applications. However, its TE performance is limited by the low carrier effective mass ( m* ) of only 0.1 m 0 , where m 0 represents the free electron mass. In this study, we employ a microwave-assisted method to synthesize nanostructured Ag 2-x Se with Pb doping that is found to increase m* to 0.4 m 0 . Accordingly, the Seebeck coefficient is significantly enhanced, which together with the high electrical conductivity, leads to enhanced electronic transport. The increase in m* is systematically investigated by density functional theory calculations and linked to the enhanced electronic by modeling simulations. The calculated band structures reveal that the hybridization of heavy Pb-6p orbitals flattens the conduction band edges, and thereby enhances m* . Furthermore, Pb doping significantly reduces the lattice thermal conductivity due to the high-density point defects, dislocations, and grain boundaries, as revealed by detailed electron microscopy characterizations. The synergy from both enhanced electronic transport and reduced phonon propagation yielded a maximum figure of merit of 1.04 at 376 K, and an average figure of merit of 1.0 for Pb-doped Ag 1.9 Se. The optimized TE performance is further validated in a flexible TE generator, which produced a maximum output power of 0.6 μW at a temperature difference of 45 K. These findings demonstrate that enhancing m* and increasing phonon-scattering using vacancy tuning and aliovalent doping effectively boosts the TE performance of Ag 2 Se, a strategy that can be extended to other TE materials to maximize their potentials for power generation and thermoelectric cooling applications.
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