LANGMUIR
·
2024
·
IF 3.7
Hongyan Yu,Yongxue Chen,Zhenyu Wen,Rensheng Wang,Sisi Jia,Wenjie Zhu,Yanping Song,Huanhuan Sun,Bingbing Liu
Pressure-induced surface-enhanced Raman spectroscopy (PI-SERS) has garnered significant attention as a subfield of SERS detection due to its capacity to regulate the band gap between molecules and substrates through pressure modulation. Currently, SERS detection primarily focuses on single molecules at atmospheric pressure with limited investigations conducted under high pressure conditions. Herein, we employed rose-shaped MoS2 nanoflowers as the SERS substrate and realized selective PI-SERS enhancement of R6G molecules in the binary (MV+R6G) and ternary (MV+R6G+RhB) systems. The MoS2 demonstrated an exceptionally low SERS detection limit of 5 × 10–6 M in binary and ternary systems with equimolar amounts of molecules. High-pressure experimental results indicate that MoS2 displays selective enhancement for R6G molecules, as evidenced by the comparison of the PI-SERS peak intensity ratio between MoS2 and the probe molecules. The proposed enhancement mechanism in binary and ternary SERS systems under high pressure involves pressure-induced changes in both the band structures of the MoS2 substrate and molecules, thereby influencing their charge transfer dynamics. Consequently, this approach holds great promise for practical applications in complex SERS systems operating under extreme conditions.
研究领域:
材料科学
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光谱学
·
化学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Shunxin Xu,Juncai Zhang,Yaru Zhao,Yanqiong Shen,Yichun Qiu,Yuhang Bao,Kui Tang,Yanfang Peng,Yuanqin Zeng,Jinjie Qian,Qipeng Li
R6G@UIO-67 consisted of the rhodamine 6G (R6G) in the nanocages or nano-pores of UIO-67 , which was successfully constructed by the one-pot method under hydrothermal conditions. Whose structure, stability and morphology were characterized by the XRD, TGA and SEM. R6G@UIO-67 exhibited the highly thermal stability up to 550 °C, and emitted the bright yellow light at 580 nm with the quantum yield of 44.66%, which could selectively detect the ornidazole (ODZ) among eight antibiotics. Furthermore, R6G@UIO-67 was associated with commercial green phosphor powder and red phosphor powder, which were encapsulated on the 455 nm blue LED chip, to obtain an exceptional warm white light emitting diode (WLED) device with the CIE coordinates of (0.385, 0.385), correlated color temperature (CCT) of 3951 K, luminous efficiency (LE) of 122.45 lm/w and color render index (CRI) of 93.8.
研究领域:
材料科学
·
光学
·
分析化学
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DOI
高影响因子
Analytical Methods
·
2024
·
IF 2.7
Huifeng Xu,Weihua Huang,Rui Pan,Ronglin Chen,Lili Wang,Yun Yu,Xihai Li,Xi Zhu
A stable dual-emission fluorescent system, R6G/Eu-MOF, was obtained by simple mixing Eu-MOF with fluorescent rhodamine 6G (R6G). This system not only achieved robust dual luminescence performance at 430 nm (Eu-MOF) and 555 nm (R6G) under single-wavelength excitation, but also endowed it significantly improved fluorescence stability. Orientin (OT), a bioactive traditional Chinese medicine (TCM) component, was found to efficiently quench the dual fluorescent emissions via the synergistic effect of dynamic quenching effect, photo-induced electron transfer and molecular interactions. Therefore, a rapid fluorescent assay for OT was developed based on the variations in fluorescence signals at 430 nm and 555 nm, as well as the alterations in the ratio between these two signals. This method can achieve highly sensitive determination of OT in the linear range of 1.1-220 µM, with a LOD of 0.26 µM at 430 nm and 0.16 µM at 555 nm (3σ/N). The R6G/Eu-MOF hybrid exhibits significantly lower detection limits and a broader linear range OT than either R6G or Eu-MOF alone. This work presents a simple strategy to improve the water stability of Eu-MOF, and also provides a rapid analysis of small molecule drug using a fluorescence approach based on dual-emission MOF hybrid system.
研究领域:
分析化学
·
药物分析
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材料科学
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 34
·11282-11290
·
IF 4.029
Hongji Li,Xiaonan Wang,Zirun Wang,Jiaqi Jiang,Maobin Wei,Jiahong Zheng,Yongsheng Yan,Chunxiang Li
In this study, a novel SERS sensor was successfully prepared by combining a molecular imprinted technique (MIT) with a SERS technique to improve the selectivity of the traditional SERS technique. Moreover, a thermo-sensitive technique was also introduced to confer stimuli-responsive properties to the materials. In a typical procedure, the Ag nanoparticles (NPs) were reduced on the surface of ZnO nanorods (NRs), and the ZnO/Ag heterostructures were used as the SERS substrates. Subsequently, a layer of thermo-sensitive imprinted polymer was coated on the surface of ZnO/Ag heterostructures to prepare the thermoresponsive ZnO/Ag/molecularly imprinted polymers (ZOA-TMIPs) by precipitation polymerization. Moreover, it was proven that the ZOA-TMIPs were regenerable and exhibited good reusability. The results proved that the materials in this study can be effectively used for residual organic dye detection in water.
研究领域:
分析化学
·
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yinjiang Leng,Jing Zhang,Tao Xu,Yi Ma,HuiBo Luo,Danqun Huo,Suyi Zhang,Changjun Hou
A triple-channel R6G@Eu-MOF fluorescent probe was developed for multi-signal sensing. • A six-channel sensor array was constructed using two solvent-dependent fluorescence responses. • The sensing mechanism involved hydrogen bonding and Eu excited-state/O–H oscillator coupling. • The platform enabled discrimination of organics, Baijiu, and other distilled liquors. Rapid discrimination of Baijiu is of interest for preliminary quality assessment and authenticity screening. In this work, a single-probe multi-channel fluorescent sensor array was developed based on R6G@Eu-MOF for Baijiu discrimination. By integrating rhodamine 6G (R6G) and Eu 3+ into one MOF platform, R6G@Eu-MOF provided three intrinsic emission signals at 550, 594, and 615 nm. Unlike conventional sensor arrays that usually require multiple sensing materials, this strategy expanded the three emission outputs into a six-channel response pattern by using DMF and ethanol as two distinct probe-dispersing microenvironments. Owing to differences in polarity, hydrogen-bonding ability, and chemical composition, different analytes induced characteristic fluorescence-response fingerprints. The response behavior was attributed to hydrogen-bonding interactions, modulation of the R6G microenvironment, coupling of the Eu excited state with O H oscillators, and possible inner filter effects. Based on this strategy, 16 representative organics and EtOH-water mixtures with different ratios were effectively discriminated. Under the current experimental conditions, 16 representative commercial Baijiu samples were clearly separated in the LDA analysis, and blind-sample validation showed a recognition accuracy of 90.6%. The array was also extended to other distilled liquors. This work provides a simple and material-efficient fluorescent-array strategy for pattern-recognition analysis of complex liquor samples. Scheme 1 Schematic illustration of R6G@Eu-MOF fluorescent sensor array for Baijiu discrimination. Download: Download high-res image (150KB) Download: Download full-size image
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DOI
高影响因子
Analytical Methods
·
2022
·Vol. 14
·期 41
·4122-4126
·
IF 3.532
Mingming Yan,Minglu Li,Dongning Wang,Huifang Chen
A rapid method for the determination of ethanol content is proposed and tested. A fluorescence detecting system, with a multimode fiber (MMF) sensing head, is employed. Rhodamine 6G (R6G) is applied as the fluorescent indicator. In the R6G aqueous solution, the molecules aggregate at high concentration, causing fluorescence quenching. Nevertheless, aggregation and quenching rarely occur in ethanol. Taking an ethanol and water mixture as the solvent, the photoluminescence (PL) intensity reflects the aggregation degree and the ethanol content. Based on this phenomenon, the contents of the ethanol–water mixture were measured through PL intensity detection. A limit of detection (LOD) at ∼0.1 vol% level was obtained in the range of 0–100%. Commercial Chinese baijiu and rubbing alcohol were tested and the results obtained were consistent with the label values. The detecting system is compact and of low-cost, and the detecting method is rapid, accurate and repeatable. There is good prospect of applications for the determination of ethanol content on-site.
研究领域:
分析化学
·
光学工程
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产品关联
DOI
PubMed
高影响因子
Food Chemistry-X
·
2024
·
IF 6.5
Jinxin Chen,Cheng Zhang,Lunzhao Yi,Fengmin Duan,Ying Gu,Kun Ge,Xuejing Fan
The improvement of detection accuracy without loss of rapidity and sensitivity by optical sensors in complex food analysis is still full of challenges owing to the matrix interference. Herein, a novel and simple self-calibration colorimetric/fluorescence/surface-enhanced Raman spectroscopy (SERS) tri-modal optical sensor based on aminated Rhodamine 6G (R6G-NH 2 ) was developed for highly rapid, sensitive, and accurate detection of Hg 2+ in food samples. The high recognition specificity of R6G-NH 2 for Hg 2+ can be achieved through the metal chelation interaction between Hg 2+ and -NH 2 , -COOH groups in R6G-NH 2 with formation of R6G-NH 2 -Hg 2+ -R6G-NH 2 complex. The DFT and FDTD simulations were adopted to confirm the theoretical feasibility in Hg 2+ detection by tri-modal optical. Under the optimum conditions, the analytical method based on self-calibration tri-modal optical sensor for Hg 2+ detection was established with promising properties (rapidity, linearity, linear range, LOD, and LOQ), providing a strategy in rapid, selective, sensitive, and accurate detection for food safety.
研究领域:
分析化学
·
食品科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
OPTICAL ENGINEERING
·
2012
·
IF 0.959
Hongyan Zhang,Xiaoyi Lv,Changwu Lv,Zhenhong Jia
Highly active and sensitive surface-enhanced Raman scattering (SERS) substrates were prepared by n -type (1 to 10 Ω⋅cm in resistivity) porous silicon (PS) substrates of Ag nanoparticles. SERS studies were carried on these substrates with R6G as a test molecule with a λ ex =785 nm laser. We optimized the fabrication procedure, which is easy and rapid, for nanostructured silver particles on the surface of PS. The maximum of SERS enhancement for R6G is observed for PS with an anodization current density of 6 mA/cm 2 and an etching time of 8 min. The detection limit for R6G absorbed on Ag-coated PS (Ag-PS) is 10 nM and SERS spectra show that the Ag-PS substrate has high SERS activity. The larger pore diameter of this new Ag-PS substrate is expected and the size of the pore diameter is about 1.2 μm, which permits better biomolecule infiltration. This new Ag-PS substrate can be applied in SERS in biochemical and biomedical fields.
研究领域:
材料科学
·
分析化学
·
生物医学
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产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Shaoxiong Qin,Zixiu Li,Yang Zhang,Jiaqi Pan,Jun Cao,Chaorong Li,Jingjing Wang
The sensitivity and stability of SERS substrates are critical in surface-enhanced Raman scattering (SERS) spectral applications. The present study describes the synthesis of Cu 2 O nanoparticles using a facile chemical method. It was observed that both glucose and NaBH 4 , employed as reducing agents, exerted significant influence on the particle size. Notably, NaBH 4 exhibited enhanced efficacy in producing nanoscale particles. Furthermore, the structural characteristics of the sample were significantly influenced by the concentration of the reducing agent NaBH 4 ; an excessive concentration resulted in the emergence of metal copper. The Cu 2 O nanoparticles, obtained through a suitable reduction process using NaBH 4 , exhibited significant SERS activity, indicating a strong chemical interaction between Cu 2 O and rhodamine 6G (R6G) molecules. The N-doped Cu 2 O nanoparticles with varying proportions were synthesized. Raman spectra analysis revealed that the 2%N–Cu 2 O nanoparticles exhibited the most significant enhancement effect. These findings suggest that doping represents an effective approach to enhance the SERS activity of semiconductor substrates. In addition, in-situ reduction reaction was employed to synthesize Cu 2 O/Ag composite nanoparticles, which exhibited outstanding SERS activity and enabled the detection of 10 −9 M R6G. The observed enhancement is mainly attributed to the synergistic effects arising from the electromagnetic enhancement provided by Ag nanoparticles and the chemical enhancement offered by Cu 2 O. This research provides a simple and cost-effective method for preparing Cu 2 O-based SERS substrates with excellent performance, offering valuable insights and approaches for enhancing SERS performance in the future.
研究领域:
材料科学
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光谱学
·
纳米技术
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 26
·期 1
·139
·
IF 4.9
Yutong Huang,Simiao Zhang,Mei Zhou,Xiaokang Xu,Weiqing Sun,Jing Ma,Long Wu
Biogenic amines (BAs), produced in fish and seafood due to microbial contamination, pose significant health risks. This study introduces a novel ratiometric fluorescent probe, synthesized by integrating rhodamine 6G(R6G) and gold nanoparticles (AuNCs), for the sensitive and specific detection of BAs. The probe operates on the principle of BAs hydrolysis, catalyzed by diamine oxidase, to produce hydrogen peroxide (H2O2), which selectively quenches the fluorescence of AuNCs at 620 nm, while the fluorescence of R6Gat 533 nm remains unaffected. The ratio of I620/I553demonstrated excellent linearity with a wide dynamic range (1–1000 μM) and a low detection limit of 0.1 μM. Validation using grass carp samples showed high recovery rates (97.57% to 104.29%), confirming the probe’s efficacy and potential for practical application in food safety monitoring.
研究领域:
食品科学
·
分析化学
·
生物技术
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产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2025
·
IF 4.6
Wen Liu,Jun Dong,Yuchong Ren,Wanting Zhou,Qingyan Han,Chengyun Zhang,Kaili Ren,Yongkai Wang,Wei Gao,Jianxia Qi
In this paper, Au-Ag alloy nanostar (Au-Ag NSt) substrates were prepared by liquid–liquid three-phase self-assembly method, and the influence of preparation conditions on their Raman activity of the substrate was explored. By adjusting the gold-silver ratios of alloy seeds and the concentration of AgNO 3 in the growth solution, it was found that the LSPR peak can be adjusted. Under the conditions of Au 1 -Ag 3 nanoparticles as seeds and 200 μL AgNO 3 solution (2 mM) as epitaxial growth solution, the prepared Au 1 -Ag 3 NSt substrate exhibits excellent SERS activity. The substrate can detect R6G and CV probe molecules with detection limits as low as 10 −11 M and 10 −10 M, respectively. Experiments have confirmed that the substrate has the characteristics of high sensitivity, good uniformity and strong stability. In addition, the substrate can detect APM molecules far below the safety standard, which further proves that the structure has excellent practical application potential as a SERS substrate.
研究领域:
材料科学
·
分析化学
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产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.2
Sonia Ghafoor,Lefei Zhang,Hongjie Huang,Pei Wang
Plasmon resonance energy transfer (PRET) enhances energy transfer between plasmonic nanostructures and fluorophores by exploiting spectral overlap, thereby strengthening the light-matter interactions. However, conventional PRET systems rely on single-mode coupling, which limits their tunability and applicability to fluorophores with broad or multipeak emission spectra. Here, we introduce a dual-mode PRET system consisting of silver nanorod arrays coupled with Rhodamine 6G (R6G) molecules embedded in a PMMA matrix. By tuning the nanorod length, we achieved the simultaneous coupling of two longitudinal plasmonic resonance modes with the R6G emission band. Importantly, a strong emission peak results from the enhanced excitation and emission rates of R6G molecules caused by the well-spectral overlap between the plasmonic resonance modes of the silver nanorods and the R6G emission band, reducing the fluorescence lifetime to 0.43 ns. In contrast, weak spectral overlap produces a lower emission intensity and a longer fluorescence lifetime of 2.1 ns. The proposed PRET system can offer a tunable dual-mode platform with promising potential for next-generation biosensing, fluorescence modulation, and photonic-device applications.
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DOI
高影响因子
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