Materials Today Chemistry
·
2025
·
IF 6.7
Xiaoman Qi,Yonghui Xia,Jingtao Wu,Xuan Wan,Tianyu Wang,Qing Li,Guangli Li
The abuse of marbofloxacin (MBF) leaves residues in foods and environment. Therefore, developing a selective method for trace determination of MBF is of great significance. Herein, a bimetallic Au@Ag nanoparticle-decorated black phosphorus nanosheet-supported molecularly imprinted polymer film (MIP/BPNS-Au@AgNP) was fabricated for label-free and robust MBF sensing. In the presence of MBF, a polypyrrole film was grown onto the surface of BPNS-Au@AgNPs via potentiodynamic scanning. Au@AgNP functionalization prevented BPNS from degrading in aqueous solutions, enhanced its electrical conductivity, and provided a larger surface area to accommodate more selective imprinted cavities. Hence, the MIP/BPNS-Au@AgNP film demonstrated excellent electrochemical activity for MBF oxidation, including a broad linear dynamic concentration range (0.001–10 μM) and a low limit of detection (0.13 nM). Moreover, the MIP/BPNS-Au@AgNP film exhibited outstanding signal discrimination ability against potential interfering species and retained robust responses for four weeks. The MIP/BPNS-Au@AgNP film could also determine trace amounts of MBF in milk, sewage, and serum.
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高影响因子
ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Xingkang Diao,GuoHua Qi,Yu Tian,Jing Li,Yongdong Jin
Hydrogen peroxide (H2O2) is a key reactive oxygen species (ROS) that regulates redox signals in organisms by reversibly oxidizing target proteins. However, it causes oxidative damage at supraphysiological concentrations, leading to various diseases. Therefore, accurate and sensitive detection of H2O2 in organisms, especially in cells, is essential for reliable pathological diagnosis. Herein, a sensitive and reproducible surface-enhanced Raman spectroscopy (SERS) platform was developed for in situ profiling detection of H2O2 released from cells utilizing a uniform and dense plasmonic Ag@Au core/shell nanoparticle nanomembrane (Ag@AuNPs-NM) as the SERS substrate. In the designed substrate configuration, the Ag@Au core/shell nanostructure combines the strong electromagnetic field enhancement of AgNPs with the stability of AuNPs, which could enhance the sensitivity of SERS detection. Meanwhile, the dense and uniform distribution of “hot spots” in the Ag@AuNPs-NM endows the platform with excellent detection reproducibility. In the presence of H2O2, the ratiometric I1073/I998 SERS signal of the Raman reporter 4-mercaptophenylboronic acid (4-MPBA) is changed due to the oxidation of the boronate group of 4-MPBA to the phenolic hydroxyl group of 4-hydroxythiophenol (4-HTP). The developed SERS sensing platform possesses a good linear relationship between the ratiometric I1073/I998 signal of 4-MPBA and the concentration of H2O2 in the range from 1 to 500 μM, with a limit of detection of 0.26 μM. As a proof of concept, we applied this platform to in situ monitoring of drug-stimulated H2O2 released from cells that were cultured on the SERS chips. This work provides a practical method for the in situ profiling detection of cellular H2O2 with satisfactory results, holding promise for the diagnosis of H2O2-associated diseases.
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PubMed
高影响因子
CATALYSIS TODAY
·
2025
·
IF 5.3
Yupeng Tian,Yujia Liu,Shoutao Ma,Wei Xu,Chenyang Zhao,Bing Sun
This study introduces a heart-like micromixer reactor and Au/TS-1 catalyst to address the dual challenges of safety and efficiency in gas-phase propylene epoxidation using H 2 and O 2 . Conventional methods face inherent explosion risks and rapid catalyst deactivation due to sintering and coking. The microreactor architecture achieves over 99% flame-quenching efficiency via sub-millisecond radical suppression and enhanced heat transfer, enabling safe operation with minimal inert gas dilution (N 2 < 70 vol%). Coupled with alkali-promoted Au/TS-1 catalysts, the system sustains > 90 % propylene oxide (PO) selectivity for 500 h, outperforming static mixers where activity halved within 100 h. This work pioneers a reactor-catalyst co-design strategy, decoupling safety constraints from reaction efficiency, and establishes a scalable platform for sustainable PO synthesis. Besides, the critical gaps in industrial-scale implementation of explosive gas-phase reactions is bridged.
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IEEE TRANSACTIONS ON ELECTRON DEVICES
·
2023
·Vol. 70
·期 8
·4251-4256
·
IF 3.1
Biao He,Yongkai Jing,Xinfa Zhu,Chao Fan,Chun Sun,Yonghui Zhang,Mengjun Wang,Hongxing Zheng,Erping Li
In this work, light detectors utilizing p-type tin monosulfide (p-SnS) few layers with an Au/SnS/Ag Schottky structure are demonstrated. These detectors exhibit broad-spectrum light detection capabilities spanning the visible to near-infrared (NIR) wavelength range. Notably, under NIR 850 nm illumination, the detectors exhibit exceptional photodetection performance with an ultrahigh responsivity of up to 1652.87 $\text{A}\cdot \text{W}^{-{1}}$ , an extremely specific detectivity of $8.05\times 10^{{12}}$ cm $\cdot $ Hz $^{\text {1/{2}}}\cdot \text{W}^{-{1}}$ , and a rapid response time of approximately 6.5 ms. These characteristics surpass those of most 2-D materials-based detectors and even outperform commercial InGaAs (Hamamatsu, InGaAs G8370-85) and Silicon (Hamamatsu, Si S9119-01) detectors. The remarkable photoresponse is attributed to the SnS/Ag Schottky structure, which facilitates the separation of excited electron–hole pairs. Our findings suggest a promising route for developing high-performance optoelectronics based on p-SnS.
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高影响因子
Nanoscale
·
2014
·Vol. 6
·期 14
·7954-7958
·
IF 6.739
Wenya Cai,Xianghu Tang,Bai Sun,Liangbao Yang
In this study, multifunctional Fe3O4/C/Au nanoparticles (NPs), which catalytically integrated active small Au NPs with surface-enhanced Raman scattering (SERS) active large Au NPs, were fabricated via a facile method and employed for the in situ SERS monitoring of a catalytic reaction of p-nitrothiophenol (p-NTP) to p-aminothiophenol (p-ATP). In addition, the effect of magnet power was tested and it was demonstrated that the SERS intensity of the reaction system was stronger, and the reaction proceeded more smoothly because more hot spots existed and remained the same in the magnetic field; hence, the catalytic rate could be determined.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2016
·
IF 4.712
Liyuan Wang,Jiao Shan,Feng Feng,Zhanfang Ma
A novel electrochemical redox-active nanocomposite was synthesized by a one-pot method using N,N′-diphenyl-p-phenylediamine as monomer , and HAuCl 4 and K 2 PtCl 4 as co-oxidizing agents. The as-prepared poly(N,N′-diphenyl-p-phenylediamine)-Au/Pt exhibited admirable electrochemical redox activity at 0.15 V, excellent H 2 O 2 electrocatalytic ability and favorable electron transfer ability. Based on these, the evaluation of the composite as sensing substrate for label-free electrochemical immunosensing to the sensitive detection of carbohydrate antigen 199 was described. This technique proved to be a prospective detection tool with a wide liner range from 0.001 U mL −1 to 40 U mL −1 , and a low detection limit of 2.3 × 10 −4 U mL −1 (S/N = 3). In addition, this method was used for the analysis of human serum sample, and good agreement was obtained between the values and those of enzyme-linked immunosorbent assay, implying the potential application in clinical research. Importantly, the strategy of the present substrate could be extended to other polymer-based nanocomposites such as polypyrrole derivatives or polythiophene derivatives, and this could be of great significance for the electrochemical immunoassay .
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高影响因子
ORGANIC ELECTRONICS
·
2018
·
IF 3.68
Weijia Xie,Jianping Zhou,Sumei Huang,Wei Ou-Yang,Wenhui Xie,Zhuo Sun,Xiaohong Chen
Plasmon enhanced perovskite solar cells (PSCs) incorporated with AgAl and Au composite nanoparticles (NPs) isolating from AgAl metal electrode with ultra-thin LiF spacer were investigated. PSCs with AgAl-Au composite NPs got 17.02% of the power conversion efficiency (PCE), which is 11.10% higher than PCE (15.32%) of the control PSC with only AgAl electrode. Furthermore, the hysteresis effect of PSCs with LiF modified AgAl and Au composite NPs can be neglected compared to the control cells without NPs and LiF spacer. In the meanwhile, carrier transport and collection probabilities of PSCs with AgAl and Au composite NPs were increased to 96.86% from 89.51% in control cells, indicating the improved electron transport and extraction ability. The enhanced PCEs of PSCs with AgAl(3 nm)/Au(2 nm)/LiF(1 nm) are attributed to the improved light absorption of perovskite layer and the reduced contact barrier at metal electrode, which can be supported with its enhanced photon-to-electron conversion efficiency (△IPCE) and the disappeared negative capacitive behavior. Furthermore, the obviously reduced work function values of AgAl-Au composite NPs and AgAl metal electrode after LiF modification were observed with ultraviolet photoelectron spectroscopy spectra. Our results indicate that thermally evaporating a ultra-thin LiF spacer can well inhibit the energy dissipation of plasmon effects of AgAl-Au composite NPs and reduce the contact barrier between PCBM and AgAl metal electrode, which is an efficient strategy to achieve efficient plasmon-enhanced perovskite solar cells .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yao Wang,Hanlun Xu,Xiaoyu Wang,Pengqi Lu,Jiaqi Zhu,Nasir Ali,Huizhen Wu
An ordered metal array normally can enhance the electric field near the surface by generating strong excitation of surface plasmons (SPs), while two-dimensional materials (2DMs) can ensure efficient adsorption of the aromatic molecules. Herein, an AuNPs/GaTe/Au-hole array structure for SERS is first theoretically simulated and successively prepared experimentally. The parameters of the Au-hole array are optimized through finite-difference time-domain (FDTD) numerical simulations; including period, depth, and geometry. With Rhodamine 6G (R6G) probe molecules, the strongest Raman signal is observed at the edge of the Au-hole. The corresponding enhancement factor reached as high as 1.8 × 10 6 , which enabled the limiting detection concentration of 10 −16 M of R6G, surpassing most of the existent SERS substrates. Simulations of GaTe, AuNPs/GaTe/Au-film, and AuNPs/GaTe/Au-hole array are applied to explain the observation of SERS activity in the Au-hole array structure. Moreover, the structure exhibited good reproducibility and stability.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Yanxiao Quan,Guojun Weng,Jian Zhu,Jianjun Li,Junwu Zhao
Background Volatile organic compounds (VOCs) in human exhaled breath serve as molecular fingerprints that reflect metabolic dysregulation and can indicate the onset and progression of diseases such as lung cancer. Surface-enhanced Raman scattering (SERS), characterized by its high sensitivity, molecular specificity, and tolerance to humidity, offers a promising approach for breath analysis. However, the intrinsically weak Raman activity of exhaled biomarkers and poor gas adsorption on solid substrates still hinder its practical implementation. Therefore, it is essential to develop a SERS-based breath sensor that simultaneously enables signal amplification, gas enrichment, rapid operation, and cost-effectiveness. Results This study presents a novel ultrasensitive SERS sensing platform based on a core-shell ZIF-L@Au NTs composite, integrating high sensitivity, selectivity, and rapid detection capabilities. The anisotropic gold nanotriangles (Au NTs), serving as the plasmonic core, exhibit excellent structural stability and strong electromagnetic field enhancement. The outer ZIF-L metal-organic framework (MOF) shell facilitates the selective adsorption and pre-enrichment of target analytes, while its confinement effect synergistically amplifies the SERS signal, markedly improving detection sensitivity. As a result, the system enables reliable quantification of 4-ethylbenzaldehyde in the concentration range of 10 −4 -10 −8 M, achieving a detection limit down to the sub-ppm level with high stability and repeatability. Simulated detection of the potential lung cancer biomarker 4-ethylbenzaldehyde demonstrated the platform's strong enrichment capability and outstanding sensing performance. Significance This work establishes an ascorbic-acid-directed strategy to construct flower-like ZIF-L and, for the first time, integrates gold nanotriangles with a metal-organic framework into a core-shell ZIF-L@Au NTs SERS platform. The synergistic combination of MOF-based gas enrichment, sharp-tip plasmonic hot spots and 4-ATP/aldehyde chemistry enables sub-ppm level detection of exhaled 4-ethylbenzaldehyde, highlighting a promising route for non-invasive breath diagnostics.
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高影响因子
RSC Advances
·
2014
·Vol. 5
·期 8
·5604-5610
·
IF 3.708
Mei Yu,Jindan Zhang,Songmei Li,Yanbing Meng,Jianhua Liu
The performances of photovoltaic devices can be improved by increasing light-harvesting and charge collection respectively. The design and synthesis of nanocomposites with the ability of enhancing the generation and collection of the photo-generated electrons provide a significant way to improve the power conversion efficiency (PCE). Herein, SWNTs@(TiO2/Ag/Au) nanocomposites were synthesized and successfully integrated into photoanode films of dye-sensitized solar cells (DSSCs) to improve the power conversion efficiency. The synthesis processes were based on multi-functional DNA. DNA not only works as a dispersing agent preventing SWNTs bundling but also as a sacrificial mold assembling TiO2, Ag and Au nanoparticles on the surface of the SWNTs. The synthesized SWNTs@(TiO2/Ag/Au) nanocomposites enhance the charge collection and light-harvesting of DSSCs simultaneously. With 2.45 wt% SWNTs@(TiO2/Ag/Au) nanocomposites incorporating into the photoanode films, the PCE of the DSSCs increases from 6.8% to 8.3%.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光伏器件
·
表面科学
·
胶体与界面化学
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高影响因子
International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 6
·1886-1899
·
IF 8.8
Zeng Yong,Che Xiyuan,Zhang Lei,Chen Peng,Song Shaoxian,Wang Deshou,Jia Feifei
Thiosulfate gold extraction technology has gained considerable interest owing to its environmental compatibility and broad applicability to diverse ore types. However, the lack of efficient methods to recover Au(S 2 O 3 )
3− 2
from leaching solutions has hindered its industrial implementation. To address this challenge, this study used a thiosulfate leaching solution from quartz-type gold ores to design an activated carbon-coated titanium electrode (Ti@AC) with a porous surface structure. This electrode facilitated the direct reduction of low-concentration Au(S 2 O 3 )
3− 2
to metallic gold (Au 0 ) in solution, achieving a gold recovery of 99.58%, surpassing other recovery methods from the leaching solution by 30%–80%. After ten consecutive 200 L pilot-scale tests, the Ti@AC electrode demonstrated remarkable stability, consistently maintaining a recovery >98% and yielding 20.23 g of gold. The porous architecture of the activated carbon (AC) promoted the adsorption of low-concentration Au(S 2 O 3 )
3− 2
, while its low charge transfer resistance facilitated the efficient conversion of Au(S 2 O 3 )
3− 2
to Au 0 . Moreover, the reduction reaction generated a concentration gradient near the cathode, promoting the diffusion of Au(S 2 O 3 )
3− 2
toward the electrode and ensuring an efficient recovery process. This study provides a feasible strategy for the direct reduction of low-concentration precious metal ions to monomers with high recovery and low costs, which is promising for industrial applications.
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FOOD CHEMISTRY
·
2026
·
IF 10.4
Haitong Wang,Cunxiang Bo,Bingxin Xu,Yu Liu,Mengping Zhang,Xinyuan Zhao,Liqun Song,Hua Shao,Cuijuan Wang
•AuNPs-modified COF on a portable 25-well plate for testing DIF and FLU residues. • •Integration of adsorption and SERS functions for streamlined analyses. • • Portable, on-site detection system enabling field-ready pesticide monitoring. • • Ready-to-use, pretreatment-free SERS assay delivering real-time results. We developed a ready-to-use surface-enhanced Raman scattering (SERS) sensor for rapid, pretreatment-free detection of difenoconazole (DIF) and flusilazole (FLU) in peach and lychee juices. The substrate combines Au nanoparticles (AuNPs) with covalent organic frameworks (COF) and is implemented on a portable 25-well plate, enabling in situ testing. Juices can be directly applied to the SERS-active Au/COF composite, allowing simultaneous adsorption and signal generation. The correlation between SERS intensity and logarithmic concentration yielded R-values between 0.925 and 0.986, meeting the monitoring needs of non-laboratory scenarios. The entire workflow completes within 12 min, offering a faster alternative to conventional methods while maintaining high sensitivity and reproducibility. Detection limits reach 0.96–1.22 ppb for DIF and FLU, both of which are below the regulatory maximum residue limits. Distinct SERS fingerprints enable reliable discrimination of mixed residues across juice matrices, supporting rapid on-site monitoring and cost-effective pesticide surveillance. Download: Download high-res image (233KB) Download: Download full-size image
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