DESALINATION
·
2023
·
IF 9.9
Jia-Hao Liu,Fei Xie,Han-Zhuo Ding,Jia-Wei Mo,Xiao-Gang Jin,Xiao-Hua Ma,Zhen-Liang Xu
The permeance-selectivity trade-off has been a long-standing problem in membrane separation process, which has limited the application potential of many membrane separation techniques. Here we introduce chitosan (CS) nanofibers interlayer to optimize the substrate to improve the separation performance of thin-film composite (TFC) membrane fabricated by electrospray-assisted interfacial polymerization (EIP). A series of characterizations were conducted and the results showed that the introduction of CS nanofibers prevented polyamide from invading the substrate's pores, and increased the content of interfacial amine monomer to promote interfacial polymerization (IP) reaction. At the same time, the enhanced confinement effect formed a rougher selection layer, providing more water transport paths and enhancing the hydrophilicity of the membrane. Compared with the control TFC membrane with polyethersulfone (PES) substrate, the TFC/CS/PES membrane with CS/PES composite substrate showed excellent separation performance, achieving 4.5 times increase in permeance while maintaining a high MgCl 2 rejection. Our work provides a new strategy for optimizing the substrate and improving the properties of the membranes.
研究领域:
材料科学
·
膜分离技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 7
·566
·
IF 4.4
Xinyu Zhang,Xin Cai,Naiqiang Yin,Yingying Wang,Yang Jiao,Chundong Liu
Surface-enhanced Raman scattering (SERS), as one of the most powerful analytical methods, undertakes important inspection tasks in various fields. Generally, the performance of an SERS-active substrate relies heavily on its structure, which makes it difficult to integrate multiple-functional detectability on the same substrate. To address this problem, here we designed and constructed a film of graphene/Au nanoparticles (G/Au film) through a simple method, which can be conveniently transferred to different substrates to form various composite SERS substrates subsequently. By means of the combination of the electromagnetic enhancement mechanism (EM) and the chemical enhancement mechanism (CM) of this structure, the film realized good SERS performance experimentally, with the enhancement factor (EF) approaching ca. 1.40 × 105. In addition, the G/Au film had high mechanical strength and had large specific surface area and good biocompatibility that is beneficial for Raman detection. By further transferring the film to an Ag/Si composite substrate and PDMS flexible film, it showed enhanced sensitivity and in situ detectability, respectively, indicating high compatibility and promising prospect in Raman detection.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICS EXPRESS
·
2023
·Vol. 31
·期 23
·38699-38714
·
IF 3.8
Liu Mingjin,Shuo Cheng,Xuejian Du,Jing Li,Qianqian Peng,Chenlong Zhao,Yaoyang Wang,Xianwu Xiu
Noble metal and semiconductor composite substrates possess high sensitivity, excellent stability, good biocompatibility, and selective enhancement, making them an important research direction in the field of surface-enhanced Raman scattering (SERS). Ta2O5, as a semiconductor material with high thermal stability, corrosion resistance, outstanding optical properties, and catalytic performance, has great potential in SERS research. This study aims to design and fabricate a composite SERS substrate based on Ta2O5 nanostructures, achieving optimal detection performance by combining the urchin-like structure of Ta2O5 with silver nanoparticles (Ag NPs). The urchin-like Ta2O5 nanostructures were prepared using a hydrothermal reaction method. The bandgap was modulated through structure design and the self-doping technique, the charge transfer efficiency and surface plasmon resonance effects were improved, thereby achieving better SERS performance. The composite substrate enables highly sensitive quantitative detection. This composite SERS substrate combines the electromagnetic enhancement mechanism (EM) and chemical enhancement mechanism (CM), achieving ultra-low detection limits of 10−13 M for R6G. Within the concentration range above 10−12 M, there is a good linear relationship between concentration and peak intensity, demonstrating excellent quantitative analysis capabilities. Furthermore, this composite SERS substrate is capable of precise detection of analytes such as crystal violet (CV) and methylene blue (MB), holding broad application prospects in areas such as food safety and environmental monitoring.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Jin-Yu Zhou,Jian Zhu,Guo-Jun Weng,Jian-Jun Li,Jun-Wu Zhao
A novel surface-enhanced Raman scattering (SERS) composite substrates on the basis of Ag triangular nanoplates(Ag TNPs)-modified SiO 2 photonic crystals (PC) is fabricated and applied to the SERS detection of malachite green (MG). It consists of uniformly arranged Ag TNP@SiO 2 , a new PC. Notably, Ag TNP are uniformly aligned on the SiO 2 surface, forming a three-dimensional high-density hotspot nanostructure. With the tip “hot spots” of Ag TNPs, Bragg diffraction of SiO 2 and coupling enhancement between Ag TNPs and SiO 2 , the SERS enhancement of this composite substrates was multiplied. The effect on the SERS of Ag TNP@SiO 2 composite substrate was systematically optimized by tuning Ag TNP size, size of SiO 2 microspheres, coverage of Ag TNPs on SiO 2 and fabrication method of Ag TNPs and PC. Moreover, the uniform of SERS composite substrates and Raman signal was dramatically increased by the method of vertical deposition. Eventually, the SERS composite substrates were employed in MG detection. Its broad detection range of 1 pM–1 μM and low limit of detection (LOD) of 0.49 pM indicated acceptable sensitivity and repeatability. This work illustrates the promising applicability in food safety analysis based on SERS composite substrates composed by Ag TNP@SiO 2 with numerous SERS enhancements and excellent stability.
研究领域:
分析化学
·
食品安全
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Plasmonics
·
2024
·
IF 3.3
Cui Jiahao,Han Xue,Shi Guochao,Li Kuihua,Zhou Wenying,Li Zelong,Yu Zengshan,Wang Mingli
Surface-enhanced Raman scattering (SERS) sensors are ideal for point-of-care testing (POCT) of disease markers; the key to practical applications lies in their quantitative detection capabilities and high sensitivity. In this study, We propose a simple method to develop a high-sensitivity composite SERS substrate using physical vapor deposition (PVD) technology. This SERS substrate, utilizing 4-aminothiophenol (4-ATP) as the detection molecule, demonstrated a high enhancement factor (~ 10 6 ) and a low detection limit (10 −10 M). The corrected linearity problem achieved good linear correlation ( R 2 = 0.988) by using 4-ATP. In the trace detection process of creatinine, when creatinine is dissolved in goat serum solution diluted 1000 times, there is still a clear SERS signal at the characteristic peak when the concentration is only 10 −4 g/l, further demonstrating the potential of SERS sensors in the detection of renal disease biomarkers.
研究领域:
生物医学工程
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
OPTICS COMMUNICATIONS
·
2025
·
IF 2.5
Yu Wang,Hongyan Zhao,Guangqiang Liu,Cuixia Bi,Sujuan Feng,Tong Shi,Jiacheng Li,Hao Wang
The effect of surface-enhanced Raman scattering (SERS) depends on the structure of the SERS substrate, and the combination of special substrate structure and Au/Ag nanoparticles is an effective means for SERS. In this study, the bottom funnel head flower-shaped collapse array structure with unique morphology is prepared by improved anodic aluminum oxide (AAO) method, and gold nanoparticle (AuNPs) layers are embedded in the structure to synthesize composite substrates for high-performance Raman signal enhancement. The experimental conditions such as anodic oxidation time, reaming time, gold plating time and annealing time are discussed in detail with 4-aminothiophenol (4-ATP) as probe molecule, the ultra-low concentration detection with molecular concentration of 10 −13 mol/L can be realized. At the same time, the concentration and signal intensity shows a good linear relationship, and the field enhancement factor is as high as 1.24 × 10 6 . The structure of the substrate shows high repeatability, high sensitivity and high uniformity, which has a broad application prospect in the plasma devices based on anodic alumina.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 11
·1-9
·
IF 6.232
Xiao Dongfang,Jie Zhishun,Ma Zhiyuan,Ying Ye,Guo Xiaoyu,Wen Ying,Yang Haifeng
Waffle-like anodized aluminum oxide homogeneously immobilized with Ag nanoparticles (AAO/Ag) is rationally designed and fabricated as surface-enhanced Raman scattering (SERS) substrate. The as-prepared SERS substrate is characterized with transmission electron microscope (TEM), scanning electron microscopy (SEM), UV–Vis spectrophotometer, and Fourier transform infrared spectrometer (FT-IR). The AAO/Ag substrate shows good uniformity of the Raman signals (RSD = 7.02%) due to waffle-like AAO supporting the well-dispersed Ag nanoparticles. For real application, the AAO/Ag substrate is used for rapid determination of chloramphenicol (CAP) in honey with low detection limit (4.0 × 10 −9 mol L −1 ) and good linearity from 1.0 × 10 −5 to 1.0 × 10 −8 mol L −1 based on the SERS peak at 1348 cm −1 . The better accumulation in the short pore path of AAO improves the target molecule approaching into the vicinity of hot spots of Ag nanoparticles. The high selectivity for CAP is attributed to the strong interaction between -NO 2 group in CAP and the composite substrate.
Schematic representation of the preparation of SERS substrate, AAO 150 /Ag 10 -5 composite nanoparticles, and antibiotic determination.
研究领域:
分析化学
·
纳米材料科学
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Xiuting Li,Hongmei Liu,Chenjie Gu,Jinjie Zhang,Tao Jiang
The acquisition of a robust plasmonic substrate with both appreciable molecule anchoring and quantitative detection features is a prerequisite for the reliable adhibition of surface-enhanced Raman scattering (SERS) technology. Herein, an innovative sophisticated SERS substrate was proposed by spin-coating titanium dioxide (TiO 2 ) onto a flexible polydimethylsiloxane (PDMS) film followed by the modification of triangular silver (Ag) nanoplates through in-situ reduction. The absence of organic surfactants during this process rendered the substrate great opportunity in effectively enriching molecules and the assembly of TiO 2 and Ag made it a reusable and sensitive SERS platform. After a recyclable monitoring of 4-aminothiophenol (4-ATP) with different concentrations was carried out by reusing the hybrid substrate for 8 cycles, a limit of detection as low as 1.58 × 10 −9 M was achieved. The distinctive intrinsic Raman signal from PDMS matrix was further verified to successfully correct the poor detection linearity by serving as internal standard and the coefficient of linear correlation (R 2 ) was improved from 0.967 to 0.997. In this regard, the as-prepared multifunctional PDMS/TiO 2 /Ag hybrid substrate with simulation-estimated electromagnetic “hot spots” exhibited remarkable quantitative recyclable detection performance.
研究领域:
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Xuehua Wang,Junwei Hou,Chen Chen,Zhenhong Jia,Enguang Zuo,Chenjie Chang,Yuhao Huang,Cheng Chen,Xiaoyi Lv
Systemic lupus erythematosus (SLE) is an autoimmune disease with multiple symptoms, and its rapid screening is the research focus of surface-enhanced Raman scattering (SERS) technology. In this study, gold@silver-porous silicon (Au@Ag-PSi) composite substrates were synthesized by electrochemical etching and in-situ reduction methods, which showed excellent sensitivity and accuracy in the detection of rhodamine 6G (R6G) and serum from SLE patients. SERS technology was combined with deep learning algorithms to model serum features using selected CNN, AlexNet, and RF models. 92 % accuracy was achieved in classifying SLE patients by CNN models, and the reliability of these models in accurately identifying sera was verified by ROC curve analysis. This study highlights the great potential of Au@Ag-PSi substrate in SERS detection and introduces a novel deep learning approach for SERS for accurate screening of SLE. The proposed method and composite substrate provide significant value for rapid, accurate, and noninvasive SLE screening and provide insights into SERS-based diagnostic techniques.
研究领域:
医学诊断
·
生物技术
·
人工智能
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Jun Zhang,Bin Hu,Xiang Deng,Chen Li,Yusun Wu,Chuan Zhou,Dezhu Zhang,Lei Ge,Wei Zhou,Zongping Shao
Highly active catalysts with promising water retention are favorable for proton exchange membrane fuel cells (PEMFCs) operating under low-humidity/high-temperature conditions. When PEMFCs operate under low-humidity/high-temperature conditions, performance attenuation rapidly occurs owing to reduced proton conductivity of dehydrated membrane electrode assemblies. Herein, we load platinum onto a perovskite-carbon joint substrate (BaZr0.1Ce0.7Y0.1Yb0.1O3-σ-XC-72R) to construct a highly active and durable catalyst with good water retention capacity. We propose that the Pt/(BZCYYb-C) catalyst layer at cathode can promote the water back diffusion of produced water from the cathode to the membrane, thus preventing the decay of fuel-cell performance under low-humidity/high-temperature conditions. The catalyst exhibited outstanding mass activity of 0.542 A mgpt–1 at 0.9 V vs RHE. PEMFCs with such a catalyst delivered very high peak power densities (1.70/1.14 W cm–2 under H2–O2/air conditions at 70 °C) and kept 85.3%/92.1% of initial performance values under low-humidity/high-temperature conditions (relative humidity 60%@70 °C/100 °C).
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Wen Teng,Haipei Xu,Shun Wen,Xiang Yu,Yanrong Yang,Jing Zhang
Organophosphorus pesticides (OPPs) seriously threaten human health and ecosystems due to their environmental persistence, creating an urgent demand for highly efficient and sensitive detection technologies in environmental monitoring. UL-AuAgMSs@β-CD composite substrate was fabricated through the integration of urchin-like Au-Ag microspheres (UL-AuAgMSs) with β-cyclodextrin (β-CD) to overcome three persistent challenges in surface-enhanced Raman scattering (SERS) detection, i.e., low molecular selectivity, substrate instability, and complex matrix interference. Optimizing the three-dimensional branched structure of UL-AuAgMSs through controlled silver nitrate (AgNO 3 ) addition, a dual enhancement becomes available from both electromagnetic effects (nanotip-localized hotspots) and chemical effects (β-CD's molecular recognition capabilities). The composite substrate presented superior performances, a detection limit of 10⁻ 13 M for crystal violet (CV), excellent reproducibility (RSD = 9.10%, n = 13), and long-term stability (73.35% signal retention after 21 days), surpassing conventional single-metal substrates. Its versatility is further demonstrated in detecting methylene blue (MB), methyl orange (MO), the OPP chlorpyrifos (CPF), and the pesticide intermediate 4-aminothiophenol (4-ATP). This study proposes a synergistic strategy combining morphological engineering and molecular recognition. It offers a stable and adaptable SERS platform for rapid trace pollutant monitoring in food safety and complex environments.
研究领域:
环境监测
·
分析化学
·
纳米技术
·
食品安全
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jing Jiang,Min Liu,Dalun Xu,Tao Jiang,Jinjie Zhang
As a hypertoxic natural toxin, the risk of Microcystin-leucine-arginine (MC-LR) residues in Bellamya aeruginosa deserves more attention. Herein, employing the conventional thin-layer chromatography (TLC) technology and a novel surface-enhanced Raman scattering (SERS) substrate, a TLC-SERS chip was fabricated for the purification and quantitative detection of MC-LR in complex samples. The substrate exhibited excellent SERS performance with an enhancement factor of 6.6 × 10 7 , a low detection limit of 2.27 × 10 −9 mM for MC-LR, excellent uniformity and reproducibility, as well as a wide linear range. With the application of TLC, the MC-LR was efficiently purified and the concentration was increased to >3 times. Ultimately, recovery rates fluctuated between 93.28% and 101.66% were obtained from the TLC-SERS chip. On balance, the TLC-SERS chip has a robust capacity for achieving rapid and stable quantitative detection of MC-LR, which promises to improve the efficiency of food safety monitoring.
研究领域:
分析化学
·
环境科学
·
食品安全
✓ 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）