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学者姓名：董永强
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Abstract ：
A simple method for one-step synthesis of aggregated gold nanoparticles (a-AuNPs) using single-layer carbon dots (s-CDs) as the capping agents has been proposed. The obtained a-AuNPs are mainly composed of several spherical AuNPs of 20-25 nm sized, which aggregate to form nanogaps of similar to 1 nm. Furthermore, the obtained aAuNPs produce a strong localized surface plasmon resonance (LSPR) absorption band centered at around 640 nm, which is quite close to the wavelength of the commonly used 633 nm laser in surface enhanced Raman scattering (SERS). Thus, under the irradiation of 633 nm laser, a lot of electromagnetic field "hot spots" are formed at around the nanogaps, and strong SERS activity is achieved. The obtained a-AuNPs are dropped on tinfoil wafers to fabricate SERS substrates, which show the advantages of high sensitivity, fast response, good repeatability and satisfactory stability. On the basis, a sensitive SERS sensor is developed to detect malachite green in aquaculture water, with a low detection limit of 1 x 10(-9) mol/L.
Keyword ：
Aggregated gold nanoparticles Aggregated gold nanoparticles Localized surface plasmon resonance Localized surface plasmon resonance Malachite green Malachite green Plasmonic hotspots Plasmonic hotspots Surface enhanced Raman scattering Surface enhanced Raman scattering
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| GB/T 7714 | Zhou, Yongcong , Zhang, Jingwen , Lai, Xiaojing et al. Aggregated gold nanoparticles rich in electromagnetic field "hotspots " for surface enhanced Raman scattering [J]. | TALANTA , 2025 , 282 . |
| MLA | Zhou, Yongcong et al. "Aggregated gold nanoparticles rich in electromagnetic field "hotspots " for surface enhanced Raman scattering" . | TALANTA 282 (2025) . |
| APA | Zhou, Yongcong , Zhang, Jingwen , Lai, Xiaojing , Chen, Yiquan , Fu, Fengfu , Lin, Zhenyu et al. Aggregated gold nanoparticles rich in electromagnetic field "hotspots " for surface enhanced Raman scattering . | TALANTA , 2025 , 282 . |
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The current surface-enhanced Raman scattering (SERS) substrates typically feature a single energy level, posing challenges in coordinating electromagnetic enhancement (EM) and chemical enhancement (CM), thereby limiting the sensitive detection of numerous crucial target molecules. In this study, novel aggregated nanorings (a-NRs) hybridizing Ag, Au and AgCl are constructed as SERS substrates. On one hand, the obtained a-NRs exhibit robust localized surface plasmon resonance absorption, whose wavelength can be tuned to match three commonly used laser wavelengths (532, 633 and 785 nm) to gain strong EM effect. On the other hand, these materials possess the Fermi levels of Au nanoparticles and Au/Ag alloy, in addition to the valence band and conduction band of AgCl. The abundant energy levels of the obtained a-NRs facilitate increased charge transfer opportunities for molecules, leading to a strong CM effect. Therefore, the obtained a-NRs show ultra-high SERS sensitivity towards numerous molecules. Moreover, the unique chemical composition makes the obtained a-NRs have good long-term stability in terms of SERS activity. Besides providing high-performance SERS substrates, the valuable experience for coordinating EM and CM to construct highly active SERS substrate demonstrated in this work are expected to significantly advance the application of SERS.
Keyword ：
Chemical enhancement Chemical enhancement Electromagnetic enhancement Electromagnetic enhancement Energy-level rich Energy-level rich Gold Gold SERS SERS Silver Silver Silver chloride Silver chloride
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| GB/T 7714 | Hu, Rongjing , Fu, Shilan , Zhou, Yongcong et al. Energy-level rich nanorings hybridizing Ag, Au and AgCl as high-performance SERS substrate for numerous molecules [J]. | TALANTA , 2025 , 286 . |
| MLA | Hu, Rongjing et al. "Energy-level rich nanorings hybridizing Ag, Au and AgCl as high-performance SERS substrate for numerous molecules" . | TALANTA 286 (2025) . |
| APA | Hu, Rongjing , Fu, Shilan , Zhou, Yongcong , Lin, Zhenyu , Fu, Fengfu , Dong, Yongqiang . Energy-level rich nanorings hybridizing Ag, Au and AgCl as high-performance SERS substrate for numerous molecules . | TALANTA , 2025 , 286 . |
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A simple method is developed for the direct synthesis of aggregated silver nanoparticles (a-AgNPs), which show strong and wavelength-tunable localized surface plasmon resonance (LSPR). Three a-AgNPs (532-a-AgNPs, 633-a-AgNPs and 787-a-AgNPs) exhibiting the maximum LSPR wavelength coinciding well with those of lasers commonly used in SERS detection (532, 633 and 785 nm) are obtained. Thus, the three a-AgNPs possess abundant plasmonic hotspots under the irradiation of corresponding laser. Moreover, the three a-AgNPs show robust stability in water, and can be developed into liquid substrates directly for SERS determination. All the three substrates (532-sub, 633-sub, and 787-sub) show excellent SERS activity to 4-mercaptobenzoic acid (4-MBA) due to the synergistic effect of strong electromagnetic enhancement (EM) and chemical enhancement (CM) effects. The obtained 787-sub is further applied for the determination of thiram in juices. The low detection limit of 10 ppb and outstanding recoveries of 91.75–109.92 % suggest substantially the reliability and practicality of the developed SERS substrates in food safety detection. © 2025 Elsevier B.V.
Keyword ：
Laser safety Laser safety Metal nanoparticles Metal nanoparticles Silver nanoparticles Silver nanoparticles Surface plasmon resonance Surface plasmon resonance
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| GB/T 7714 | Hu, Rongjing , Zeng, Chenyi , Zhang, Jingwen et al. Stable aggregated silver nanoparticle in water with strong and wavelength-tunable localized surface plasmon resonance for liquid-state SERS substrates [J]. | Journal of Molecular Liquids , 2025 , 424 . |
| MLA | Hu, Rongjing et al. "Stable aggregated silver nanoparticle in water with strong and wavelength-tunable localized surface plasmon resonance for liquid-state SERS substrates" . | Journal of Molecular Liquids 424 (2025) . |
| APA | Hu, Rongjing , Zeng, Chenyi , Zhang, Jingwen , Xu, Jinhua , Pan, Cheng , Lin, Zhenyu et al. Stable aggregated silver nanoparticle in water with strong and wavelength-tunable localized surface plasmon resonance for liquid-state SERS substrates . | Journal of Molecular Liquids , 2025 , 424 . |
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For the first time, single-layer carbon dots (CDs) were used as capping agents to synthesize cuprous oxide nanosheets (Cu2O-NSs) as a high-performance surface enhanced Raman scattering (SERS) substrate, emphasizing their chemical enhancement mechanism. The Cu2O-NSs, synthesized using single-layer carbon dots as capping agents, exhibit uniform morphology and remarkable SERS activity, achieving an enhancement factor of 4.97 x 105 for crystal violet under 532 nm laser excitation. The SERS enhancement is primarily attributed to photoinduced charge transfer between the Cu2O-NSs and analyte molecules, as confirmed by energy-level alignment studies. The substrate demonstrates excellent signal homogeneity, batch-to-batch reproducibility, and long-term stability, with no significant signal attenuation over 60 days. These findings underscore the potential of Cu2O-NSs as a cost-effective and stable SERS substrate, with promising applications in chemical sensing and molecular detection.
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| GB/T 7714 | Zhong, Hao , Lin, Zhenyu , Dong, Yongqiang . Cu2O nanosheets via facile one-pot synthesis: high-performance SERS substrate with chemical enhancement for environmental sensing [J]. | NEW JOURNAL OF CHEMISTRY , 2025 , 49 (16) : 6659-6665 . |
| MLA | Zhong, Hao et al. "Cu2O nanosheets via facile one-pot synthesis: high-performance SERS substrate with chemical enhancement for environmental sensing" . | NEW JOURNAL OF CHEMISTRY 49 . 16 (2025) : 6659-6665 . |
| APA | Zhong, Hao , Lin, Zhenyu , Dong, Yongqiang . Cu2O nanosheets via facile one-pot synthesis: high-performance SERS substrate with chemical enhancement for environmental sensing . | NEW JOURNAL OF CHEMISTRY , 2025 , 49 (16) , 6659-6665 . |
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Abstract ：
Tebuconazole is one of the most commonly used fungicides in agricultural production, that has the merits of highly effectiveness, broad spectrum and systemic function. Excessive tebuconazole may pose a great threat to human and animal health. Traditional detection techniques for tebuconazole usually have limitations such as expensive equipment, poor antibody stability, and time-consuming procedures. Herein, a sensitive sensor is developed for the rapid detection of tebuconazole based on hydrogel surface-enhanced Raman scattering (SERS) chips. Aggregated Ag nanoparticles (a-AgNPs) with tunable localized surface plasmon resonance (LSPR) wavelength are in-situ synthesized in polyvinyl alcohol (PVA) solution for preparing hydrogel SERS chips. Three hydrogel SERS chips are obtained to match the three commonly used laser wavelengths. On the basis, a match laser wavelength is selected according to the energy levels of tebuconazole and the Fermi level of a-AgNPs to gain a strong chemical enhancement. At the same time, the chip with a corresponding LSPR wavelength to the laser is applied to obtain a strong electromagnetic enhancement. Thus, highly sensitive SERS signal of tebuconazole is obtained. Furthermore, the obtained hydrogel SERS chips have good repeatability, outstanding reproducibility and strong anti-interference ability, and show outstanding reliability in practical applications. As a result, the SERS chips offer a reliable and convenient platform for the quick detection of tebuconazole in foods. The detection limit is as low as 1 ppb, and the recoveries is distributed in the range of 94.66-106.70 %. This work would promote greatly the application of SERS in small molecule detection.
Keyword ：
Aggregated AgNPs Aggregated AgNPs PVA hydrogel PVA hydrogel Surface-enhanced Raman scattering Surface-enhanced Raman scattering Tebuconazole Tebuconazole Tunable localized surface plasmon resonance Tunable localized surface plasmon resonance
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| GB/T 7714 | Chen, Mingming , Lai, Xiaojing , Su, Bihang et al. Rapid detection of tebuconazole based on hydrogel SERS chips [J]. | TALANTA , 2024 , 277 . |
| MLA | Chen, Mingming et al. "Rapid detection of tebuconazole based on hydrogel SERS chips" . | TALANTA 277 (2024) . |
| APA | Chen, Mingming , Lai, Xiaojing , Su, Bihang , Jiang, Xiancai , Xu, Jinhua , Fu, Fengfu et al. Rapid detection of tebuconazole based on hydrogel SERS chips . | TALANTA , 2024 , 277 . |
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Abstract ：
Maleic hydrazide (MH) is a commonly used plant growth regulator and herbicide. However, due to its potential mutagenicity, carcinogenicity, genotoxicity, and cytotoxicity, sensitive and rapid detection of MH residues in foods is crucial. Herein, a sensitive and reliable surface-enhanced Raman scattering (SERS) sensor for MH based on a self-constructed hydrogel SERS platform is proposed for the first time. The used hydrogel SERS chips contain aggregated Ag nanoparticles (a-AgNPs). Under the irradiation of 785 nm laser, the a-AgNPs provide a large quantity of plasmonic hots to produce strong electromagnetic enhancement. Thus, strong SERS signal of MH can be gained on the hydrogel SERS platform. In addition, the unique network structure of hydrogel greatly improves the anti-interference ability to the complex sample matrix. As a result, the developed SERS sensor for MH shows the advantages of high sensitivity (a low detection limit of 50 ppb), fast response (10 min), and high selectivity. The reliability of the sensor is supported by the satisfactory recoveries of 92.80 - 105.6 % in actual samples (tea and potato). The constructed SERS sensor provides a promising approach for rapid on-site testing of MH residues.
Keyword ：
aggregated Ag nanoparticle aggregated Ag nanoparticle Hydrogel Hydrogel Maleic hydrazide Maleic hydrazide Surface-enhanced Raman scattering Surface-enhanced Raman scattering
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| GB/T 7714 | Fu, Xiaolong , Su, Bihang , Xu, Jinhua et al. Rapid detection of maleic hydrazide based on the hydrogel SERS platform [J]. | SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY , 2024 , 325 . |
| MLA | Fu, Xiaolong et al. "Rapid detection of maleic hydrazide based on the hydrogel SERS platform" . | SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 325 (2024) . |
| APA | Fu, Xiaolong , Su, Bihang , Xu, Jinhua , Pan, Cheng , Huang, Shuping , Fu, Fengfu et al. Rapid detection of maleic hydrazide based on the hydrogel SERS platform . | SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY , 2024 , 325 . |
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The chemical enhancement of semiconductor-based surface-enhanced Raman scattering (SERS) substrates is an exciting hot topic. Herein, a simple hydrothermal method is developed to prepare molybdenum disulfide (MoS2), which can be easily exfoliated into monolayer nanosheets (MoS(2)NSs) by sonication, even in the absence of any surfactant. The obtained MoS(2)NSs contain two types of defects, namely, one caused by the incorporation of Mo atoms of high valence states and one caused by the incorporation of S-2(2-). The density of the two types of defects can be easily tuned by controlling the ratio of Na2S and Na2MoO4 in the raw materials. The unique properties and the clear surface make the obtained MoS(2)NSs ideal models to investigate the effect of defects on the SERS activity of MoS2. It is found that the SERS activity of the obtained MoS(2)NSs increases dramatically with the defects caused by Mo atoms of high valence states, while it first increases and then decreases with the increase of defects caused by S-2(2-). On the basis, MoS(2)NSs with high SERS activity and a low detection limit of 5.0 x 10(-9) mol/L toward crystal violet (CV) are obtained. Moreover, the mechanism of defects affecting the SERS activity of MoS(2)NSs is revealed. The defects on one hand provide a large amount of dangling bonds that can combine CV molecules to form MoS2NS-CV complex and on the other hand provide extensive induced local dipoles and enhance the overall SERS spectrum of CV.
Keyword ：
chemical enhancement chemical enhancement crystal violet crystal violet defects defects molybdenum disulfidenanosheets molybdenum disulfidenanosheets surface-enhanced Raman scattering surface-enhanced Raman scattering
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| GB/T 7714 | Fu, Xiaolong , Wu, Huiying , Liu, Zhihong et al. MoS2 Nanosheets as Substrates for SERS-Based Sensing [J]. | ACS APPLIED NANO MATERIALS , 2024 , 7 (4) : 3988-3996 . |
| MLA | Fu, Xiaolong et al. "MoS2 Nanosheets as Substrates for SERS-Based Sensing" . | ACS APPLIED NANO MATERIALS 7 . 4 (2024) : 3988-3996 . |
| APA | Fu, Xiaolong , Wu, Huiying , Liu, Zhihong , Wang, Pengzhao , Rong, Jiefeng , Fu, Fengfu et al. MoS2 Nanosheets as Substrates for SERS-Based Sensing . | ACS APPLIED NANO MATERIALS , 2024 , 7 (4) , 3988-3996 . |
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Abstract ：
Hydrogel surface-enhanced Raman scattering (SERS) chips with tunable localized surface plasmon resonance (LSPR) wavelength are prepared to coordinate the chemical enhancement (CM) and electromagnetic enhancement (EM) effects for molecules. When detecting different molecules, a laser with matched energy is selected according to energy intervals between the molecular energy levels and the Fermi level of Ag nanoparticles to obtain the strongest CM effect. Meanwhile, a hydrogel SERS chip with the LSPR wavelength matching with the laser is selected to gain the strongest EM effect. As a result, the constructed hydrogel SERS chips show outstanding activity to many molecules. Amoxicillin, pymetrozine, and chlorpyrifos are used as the model molecules to demonstrate the great importance of CM effect and the working principle of the obtained hydrogel SERS chips. Besides the ultrahigh activity, the obtained hydrogel SERS chips also show high uniformity, long-term stability, and strong anti-interference to the sample matrix, and thereby are highly practical. This work not only provides an efficient strategy for building high-performance SERS substrates, but also sheds the light on the mechanism of wave selection of SERS.
Keyword ：
chemical enhancement chemical enhancement electromagnetic enhancement electromagnetic enhancement hydrogels hydrogels localized surface plasmon resonance localized surface plasmon resonance surface-enhanced Raman scattering surface-enhanced Raman scattering
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| GB/T 7714 | Chen, Mingming , Liu, Zhihong , Su, Bihang et al. High-Performance Hydrogel SERS Chips with Tunable Localized Surface Plasmon Resonance for Coordinated Electromagnetic Enhancement with Chemical Enhancement [J]. | ADVANCED OPTICAL MATERIALS , 2023 , 11 (7) . |
| MLA | Chen, Mingming et al. "High-Performance Hydrogel SERS Chips with Tunable Localized Surface Plasmon Resonance for Coordinated Electromagnetic Enhancement with Chemical Enhancement" . | ADVANCED OPTICAL MATERIALS 11 . 7 (2023) . |
| APA | Chen, Mingming , Liu, Zhihong , Su, Bihang , Hu, Rongjing , Fu, Fengfu , Jiang, Xiancai et al. High-Performance Hydrogel SERS Chips with Tunable Localized Surface Plasmon Resonance for Coordinated Electromagnetic Enhancement with Chemical Enhancement . | ADVANCED OPTICAL MATERIALS , 2023 , 11 (7) . |
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Electrochemiluminescence (ECL) of graphitic carbon nitride nanosheets (CNNSs) is showing extensive interest to researchers. However, the poor ECL stability of CNNSs has always been an urgent problem, which severely limits its application. Herein, a systemic investigation is carried out for the exact mechanism affecting the ECL stability of CNNSs. It is found experimentally that dissolved oxygen in the solution is selectively reduced into H2O2 through a two-electron pathway on the surface of CNNSs. The enriched electrogenerated H2O2 on the electrode surface leads to the progressive inhibition of ECL of CNNSs due to its competition with negatively charged CNNSs (CNNSs center dot-) for sulfate radical ions (SO4 center dot-). On the basis, the pathway of eliminating O2 by N2, composing CNNSs with other nanomaterials to realize the four-electron reduction, or improving the concentration of K2S2O8 is proved to be effective means for improving ECL stability successfully. Proofing the concept of CNNSs with high ECL stability, an ECL sensor is developed for the detection of H2O2. This work not only exploits the intrinsic mechanism of poor ECL stability of CNNSs, but also provides efficient methods to improve the ECL stability. Thus, we believe it has promising attraction in the research of CNNSs-based assays.
Keyword ：
Electrochemiluminescence Electrochemiluminescence Graphitic carbon nitride nanosheets Graphitic carbon nitride nanosheets Luminous stability Luminous stability Mechanism Mechanism
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| GB/T 7714 | Fu, Xiaolong , Huang, Ju , Lai, Xiaojing et al. Strategy and mechanism for strong and stable electrochemiluminescence of graphitic carbon nitride [J]. | ELECTROCHIMICA ACTA , 2023 , 444 . |
| MLA | Fu, Xiaolong et al. "Strategy and mechanism for strong and stable electrochemiluminescence of graphitic carbon nitride" . | ELECTROCHIMICA ACTA 444 (2023) . |
| APA | Fu, Xiaolong , Huang, Ju , Lai, Xiaojing , Rong, Jiefeng , Qi, Guomin , Lin, Zhenyu et al. Strategy and mechanism for strong and stable electrochemiluminescence of graphitic carbon nitride . | ELECTROCHIMICA ACTA , 2023 , 444 . |
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Serum levels of uric acid (UA) play an important role in the prevention of diseases. Developing a rapid and accurate way to detect UA is still a meaningful task. Hence, positively charged manganese dioxide nanosheets -(MnO(2)NSs) with an average latter size of 100 nm and an ultra-thin thickness of below 1 nm have been prepared. They can be well dispersed in water and form stable yellow-brown solutions. The -MnO(2)NSs can be decomposed by UA via redox reaction, leading to a decline of a characteristic absorption peak (374 nm) and a color fading of -MnO(2)NSs solution. On this basis, an enzyme-free colorimetric sensing system for the detection of UA has been developed. The sensing system shows many advantages, including a wide linear range of 0.10-50.0 mu mol/L, a limit of quantitation (LOQ) of 0.10 mu mol/L, a low limit of detection (LOD) of 0.047 mu mol/L (3s/m), and rapid response without need of strict time control. Moreover, a simple and convenient visual sensor for UA detection has also been developed by adding an appropriate amount of phthalocyanine to provide a blue background color, which helps to increase visual discrimination. Finally, the strategy has been successfully applied to detect UA in human serum and urine samples.
Keyword ：
Colorimetric detection Colorimetric detection Manganese dioxide nanosheets Manganese dioxide nanosheets Uric acid Uric acid Visual sensor Visual sensor
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| GB/T 7714 | Hu, Rongjing , Guo, Tianmin , Zeng, Chenyi et al. Colorimetric and visual determination of uric acid based on decolorization of manganese dioxide nanosheet dispersions [J]. | MICROCHIMICA ACTA , 2023 , 190 (6) . |
| MLA | Hu, Rongjing et al. "Colorimetric and visual determination of uric acid based on decolorization of manganese dioxide nanosheet dispersions" . | MICROCHIMICA ACTA 190 . 6 (2023) . |
| APA | Hu, Rongjing , Guo, Tianmin , Zeng, Chenyi , Fu, Xiaolong , Dong, Binhua , Lin, Zhenyu et al. Colorimetric and visual determination of uric acid based on decolorization of manganese dioxide nanosheet dispersions . | MICROCHIMICA ACTA , 2023 , 190 (6) . |
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