SENSORS AND ACTUATORS B-CHEMICAL
·
2017
·
IF 5.401
Ping Chen,Aiwu Zhao,Jin Wang,Qinye He,Henghui Sun,Dapeng Wang,Mei Sun,Hongyan Guo
Surface plasmon-assisted catalytic reaction of p–aminothiophenol (P-ATP) to p-nitrothiophenol (P-NTP) on ultrasensitive magnetic Au@Ag nanoparticles (Fe 3 O 4 /Au@Ag NPs) has been observed by surface-enhanced Raman scattering (SERS). The as-prepared magnetic nanoparticles integrate magnetic and desired plasmonic on the same nanostructure, show great potential for simultaneous magnetic separation and SERS-based catalytic analysis. In acid media, high concentration of nitrite ion triggered the P-ATP molecules quickly transform into P-NTP on Fe 3 O 4 /Au@Ag NPs. These unique attributes enable in-situ SERS monitoring nitrite-triggered oxidation reactions of P-ATP to P-NTP and the subsequent NaBH 4 -drived reduction reactions of P-NTP to P-ATP on Fe 3 O 4 /Au@Ag could achieve under optimized condition. Moreover, this circulated reversible redox process could provide a circular and efficient approach to detection of nitrite ion. Considering this method without sample pretreatment and can circulate many times, indicating that it is a promising method in-situ fast detection nitrite ion.
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2016
·
IF 6.333
Fanli Meng,Yi Luo,Yali Zhou,Jinwen Zhang,Yanzhen Zheng,Guozhong Cao,Xia Tao
A plasmon-enhanced upconversion composite Y 2 O 3 :Er/Au@TiO 2 (SYE/A@T) with a three-dimensional starlike morphology is prepared and then mixed with submicron TiO 2 (200 nm) to form a multifunctional scattering layer in TiO 2 -based dye-sensitized solar cells (DSSCs). In such starlike micronsized upconverter, Au nanoparticle-assisted plasmon effect can intensify the upconversion emission of Y 2 O 3 :Er, and simultaneously TiO 2 coating can improve the charge transport within SYE/A@T. Therefore, the SYE/A@T shows extended light-absorbing range to near-infrared region and improved light-scattering ability, leading to an improved photovoltaic performance of DSSCs. With the optimum mixing ratio, a conversion efficiency of 8.62% is attained, which is a significant improvement of 27.6% compared with the cell without adding SYE/A@T. Our work provides a feasible strategy to prepare an upconversion composite with plasmon-enhanced emission and enable this composite to accommodate the DSSCs system and improve the conversion efficiency of DSSCs.
研究领域:
材料科学
·
光伏技术
·
纳米光学
·
能源材料
·
表面等离激元
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Shan-Shan Li,Yuan-Yuan Hu,Ai-Jun Wang,Xuexiang Weng,Jian-Rong Chen,Jiu-Ju Feng
In this work, we developed a simple wet-chemical method for fabrication of worm-like Au–Pd nanostructures uniformly supported on reduced graphene oxide (Au–Pd/rGO), only with the assistance of polyethylene glycol monooleyl ether (Brij-35) as a growth-directing agent, a stabilizing agent, and a mild reducing agent. The as-prepared nanocomposites showed improved analytical performance for nitrite detection, which was further explored to construct a nitrite sensor with fast response, wide linear range from 0.05 to 1000.0 μM, low detection limit of 0.02 μM ( S / N = 3), good reproducibility, and long-term stability.
✓ 已验证
DOI
高影响因子
Analytical Methods
·
2026
·
IF 3
Tao Fang,Min Shi,Uchkun Ishimov,Awais Ihsan,Ruiting Tian,Jun Li,Xianju Huang,Han Cheng
This study presents the development of a highly sensitive and selective electrochemical sensor based on ruthenium-gold nanocluster-functionalized carbon fiber microelectrodes (AuNPs/RuNPs/CFME) for the ultrasensitive detection of acetaminophen (ACOP) and its genotoxic impurities, p-aminophenol (PAP) and p-nitrophenol (PNP). Leveraging the synergistic electrocatalytic effects of bimetallic nanoparticles, the modified electrode demonstrated exceptional performance, achieving wide linear ranges (0.04–100 µmol L−1 for ACOP, 1–10 µmol L−1 for PAP and PNP) and remarkably low detection limits (6.192 nmol L−1 for ACOP, 0.19 µmol L−1 for PAP, and 0.015 µmol L−1 for PNP). The sensor exhibited outstanding stability, anti-interference capability, and successful application in human serum samples with recoveries of 95.9–100.5%. Furthermore, the study explored the genotoxic interaction between ACOP and double-stranded DNA (dsDNA) using electroanalytical, UV spectrophotometric, and molecular docking techniques. Results revealed that ACOP intercalates into dsDNA via hydrogen bonding and π–π stacking, providing mechanistic insights into its hepatotoxicity at high concentrations. The proposed sensor not only offers a robust platform for multiplexed drug monitoring but also advances understanding of ACOP-induced DNA damage, highlighting its potential in pharmacokinetic studies and toxicity assessment. This work underscores the significance of nanomaterial-enhanced electrochemical sensors for pharmaceutical quality control and toxicity assessment.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 4
·258
·
IF 5.4
Liu Yeru,Zhang Mengxue,Zhou Yifan,Zhao Xiaolei,Li Xiangli,Liu Hongwei,Cai Qiyong,Liu Song
A reversed positive-signal electrochemical immunosensor was developed for ultra-sensitive tetracyclines (TC) detection, leveraging a synergistically engineered interface of conductive urchin-like Au@Pt nanoparticles (NPs) and insulating SiO 2 nanoprobes. The Au@Pt NPs provide a high-performance electroactive foundation that significantly expands the effective surface area and accelerates interfacial electron transfer kinetics. A ‘signal-on’ mechanism was innovatively constructed by utilizing the mass-transport resistance and steric hindrance of bulky, insulating SiO 2 -antibody conjugates. In the absence of TC, the anchoring of SiO 2 nanoprobes creates a dense insulating barrier that truncates electron tunneling paths. Conversely, the competitive recognition of free TC prevents probe anchoring, removing the barrier and restoring charge transfer, which results in a significantly enhanced signal. This strategy effectively transforms passive dielectric blocking into a sensitive electrochemical response, allowing effective signal amplification of subtle recognition events. Under optimized conditions, the sensor exhibited a linear differential pulse voltammetry (DPV) response from 20 fg/mL to 20 ng/mL, with detection limits of 4.55 fg/mL and 11.58 fg/mL for the glassy carbon electrode and the screen-printed electrode, respectively. The sensor demonstrated excellent specificity against structural analogs, high reproducibility, and reliable recovery in spiked milk samples. This work validates the efficacy of using cost-effective insulating nanomaterials for high-sensitivity biosensing, offering a robust tool for food safety surveillance.
Section
Graphical
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.3
Yunqing Lu,Yu Feng,Mengmeng Li,Ji Xu,Jin Wang
The photocatalytic conversion of CO 2 into solar fuels presents a sustainable approach to alleviate climate change and address energy crisis. To address the limitations of conventional photocatalysts, such as their restricted visible-light response and rapid charge recombination, we have developed a ternary nanocomposite consisting of zeolitic imidazolate framework-8 (ZIF-8), plasmonic gold nanoparticles (Au NPs), and titanium dioxide (TiO 2 ). In this system, ZIF-8 provides high-density CO 2 adsorption sites, enhancing the local concentration of CO 2 and facilitating its subsequent reduction. The incorporation of Au NPs induces a strong localized surface plasmon resonance (LSPR) effect, significantly broadening the visible-light harvesting capability of the composite and promoting efficient charge transfer between TiO 2 and ZIF-8. TiO 2 serves as a stable photocatalytic platform, enabling effective charge separation and transfer. Comprehensive characterization verifies the uniform integration of the three components and the formation of close interfacial contacts. The ternary nanocomposite demonstrates significantly improved visible-light absorption, reduced charge recombination, and enhanced photogenerated carrier separation and transfer, as supported by UV-vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL), electrochemical impedance spectroscopy (EIS), and photocurrent measurements. Under simulated sunlight, the ZIF-8/Au/TiO 2 photocatalyst achieves CO 2 -to-fuel conversion rates of 1.56 μmol g −1 h −1 for methane (CH 4 ) and 4.65 μmol g −1 h −1 for carbon monoxide (CO). This enhancement is attributed to the synergistic effects of plasmonic sensitization by Au nanoparticles and CO 2 adsorption enrichment by ZIF-8, which collectively enhance photon utilization, reactant concentration, and interfacial charge transfer dynamics.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 6
·124924
·
IF 7.5
Jing Yao,Liuqing Li,Tiefeng Xu,Wangyang Lu
As a renewable platform chemical, 2, 5-furandicarboxylic acid (FDCA) provides a sustainable alternative to petroleum-derived terephthalic acid with vital strategic importance. Achieving the efficient conversion of 5-hydroxymethylfurfural (HMF) to FDCA under environmentally friendly conditions is of great practical significance. Herein, an Au/Fe 3 O 4 /TiO 2 photocatalyst was prepared by first synthesising an Fe 3 O 4 /TiO 2 composite via a hydrothermal method, followed by amination and subsequent reduction of Au nanoparticles. Furthermore, multiple characterisations confirmed the successful loading of Fe 3 O 4 and Au nanoparticles, while abundant Fe signals were detected adjacent to the Au nanoparticles. Under simulated solar irradiation, an FDCA yield of 97% was achieved within 15 h, demonstrating the superior catalytic performance of the Au/Fe 3 O 4 /TiO 2 photocatalyst. Moreover, the photocatalytic activity remained at 85% after five consecutive cycles, indicating its excellent cycling stability and reusability. Simultaneously, superior photocatalytic activity and stability were attained owing to the strong synergistic effect among Au nanoparticles, Fe 3 O 4 and TiO 2 . In addition, the photocatalytic oxidation mechanism of HMF to FDCA over Au/Fe 3 O 4 /TiO 2 was elucidated, wherein h + , 1 O 2 and •O 2 - contributed to the production of FDCA. This study provides a promising strategy for the efficient photocatalytic conversion of HMF to FDCA under mild conditions.
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Zimiao Wen,Xinhua Lian,Zihan Zhang,Haiyan Zhao,Na Li,Min Cui,Cong Zhang
Insulin-like growth factor-1 (IGF-1) is a critical biomarker linked to various human diseases, necessitating sensitive and reliable detection methods. Herein, we report a novel sandwich-type ratiometric electrochemical immunosensor with signal on–off capability for the ultrasensitive measurement of IGF-1. The sensor was constructed using gold nanoparticle-engineered carbonized covalent organic frameworks (Au@C-COFs) as the sensing platform and thionine-enriched alkynyl COFs (Thi@aCOFs) as the signal amplification probe. Au@C-COFs exhibited excellent electrocatalytic activity toward hydroquinone (HQ) oxidation, providing a stable internal reference signal, while Thi@aCOFs generated a concentration-dependent reporter signal upon specific recognition of IGF-1 via the immobilized aptamer. The ratiometric strategy effectively eliminated external interferences, significantly enhancing accuracy and reliability. Under optimal conditions, the biosensor displayed a wide linear range from 10 fM to 1 nM, a low detection limit of 0.45 fM (S/N = 3), good specificity, stability, and satisfactory reproducibility. Furthermore, the sensor performed well for measuring IGF-1 in diluted human serum, achieving satisfactory recoveries. This work presents a robust and adaptable platform toward ratiometric electrochemical biosensing, holding great promise to achieve clinical diagnosis and management treatment of IGF-1-related disorders.
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2012
·Vol. 16
·期 12
·3783-3790
·
IF 2.131
Dong Jing,Liu Tao,Meng Xiaomeng,Zhu Jianying,Shang Kun,Ai Shiyun,Cui Shenglong
A new method based on specific binding between glycoprotein acetylcholinesterase and boronic acid-functionalized Fe@Au magnetic nanoparticles was presented for the development of acetylcholinesterase biosensor. Alginate–graphene composite-modified electrode was firstly prepared as the substrate. Then, biocompatible boronic acid-functionalized Fe@Au magnetic nanoparticles were anchored by the covalence between the cis -diol of alginate and the boronic acid group on Fe@Au nanoparticles. Acetylcholinesterase was subsequently immobilized via the bonding between the glycosyl of acetylcholinesterase and the boronic acid group. The immobilized enzyme retained relatively high bioactivity and the fabricated biosensor exhibited high sensitivity and fast response to acetylthiocholine chloride. Based on enzyme inhibition, carbamate pesticide was detected using Furadan as a model compound. Two linear ranges of 0.05–15 and 15–400 ppb were obtained with a detection limit of 0.01 ppb. The biosensor also showed acceptable reproducibility and relatively good storage stability. Moreover, satisfactory results were obtained in the real sample analysis.
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2026
·
IF 4.8
Yuzhu Hao,Zicheng Zhao,Xiaohong Liu,Yutong Wang,Heping Bai,Ganggang Ai,Xiaofeng Liu,Ran Li
This study developed a novel SERS detection platform based on seed-mediated synthesis of core-shell structured Au@Ag NPs. Benefiting from the atomic synergistic effects between the gold core and silver shell, the substrate demonstrated exceptional stability, enabling simultaneous dual-target detection of Thiram and Paraquat. Experimental results revealed linear response ranges of 1.0 × 10 −6 –1.0 × 10 −4 M (LOD: 6.89 × 10 −8 M) at 1380 cm −1 for Thiram, and 1.0 × 10 −5 –1.0 × 10 −3 M (LOD: 9.75 × 10 −6 M) at 840 cm −1 for Paraquat. Spiked recovery rates in apple samples reached 95.6%–102% for Thiram and 95%–98.4% for Paraquat. Quantitative analysis of mixed systems using an MLP model achieved 91% accuracy, 89% recall, 89% F1-score, and 90% precision. This method provides a highly sensitive and reliable technical solution for simultaneous detection of multiple pesticide residues in complex food matrices, demonstrating significant potential for rapid food safety monitoring applications.
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Lihua Li,Wenzhi Zhang,Huichao Chen,Zhigang Zhao,Meifang Wang,Jiexia Chen
In this work, a method for the visual and electrochemical detection of the breast cancer marker CA15–3 was developed based on the etching reaction of gold/silver core-shell nanoparticles (Au@Ag NPs) by mercury ions (Hg 2+ ). Two kinds of nanocomplex of silicon dioxide nanospheres-antibodies-mercury ions (SiO 2 NSs-Ab-Hg 2+ ) and Au@Ag NPs-antibodies (Au@Ag NPs-Ab) were first prepared in the visual detection. In the presence of antigen, a sandwich structure of immuno-complex was formed through the specific recognition reaction of antigen and antibody. Then, after the addition of pH 4.6 CPBS, redox reaction occurred between Hg 2+ and silver shell. With the increase of the amount of antigen, the silver shell was etched thinner and thinner, and the color changed obviously. Visual detection of CA15–3 could be realized in the range of 30–300 U/mL. In addition, we adopted the DPV signals generated by Hg 2+ etching of silver shell to realize the electrochemical detection of CA15–3. The detection concentration range was 0.1–200 U/mL with a detection limit of 0.05 U/mL.
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2023
·Vol. 415
·期 14
·2705-2713
·
IF 4.3
Hua Fei,Pan Fenglan,Yang Juanhua,Yan Yongkang,Huang Xueer,Yuan Yali,Nie Jinfang,Wang Hua,Zhang Yun
This work describes two new colorimetric nanosensors for label-free, equipment-free quantitative detection of nanomolar copper (II) (Cu 2+ ) and mercury (II) (Hg 2+ ) ions. Both are based on the analyte-promoted growth of Au nanoparticles (AuNPs) from the reduction of chloroauric acid by 4-morpholineethanesulfonic acid. For the Cu 2+ nanosensor, the analyte can accelerate such a redox system to rapidly form a red solution containing dispersed, uniform, spherical AuNPs that is related to these particles’ surface plasmon resonance property. For the Hg 2+ nanosensor, on the other hand, a blue mixture consisting of aggregated, ill-defined AuNPs with various sizes can be created, showing a significantly enhanced Tyndall effect (TE) signal (in comparison with that produced in the red solution of AuNPs). By using a timer and a smartphone to quantitatively measure the time of producing the red solution and the TE intensity (i.e., the average gray value of the corresponding image) of the blue mixture, respectively, the developed nanosensors are well demonstrated to achieve linear ranges of 6.4 nM to 100 μM and 6.1 nM to 1.56 μM for Cu 2+ and Hg 2+ , respectively, with detection limits down to 3.5 and 0.1 nM, respectively. The acceptable recovery results obtained from the analysis of the two analytes in the complex real water samples including drinking water, tap water, and pond water ranged from 90.43 to 111.56%. Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）