CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Bai-Chuan Zhao,Yao-Yu Pan,Si-Jie Liao,Zhi-Ke He,Wei Xie,Ai-Guo Shen
The development of efficient trace sensing and green photodegradation synergetic system for antibiotics has become increasingly significant in ecological environmental risk prevention. Herein, a recyclable self-cleaning surface-enhanced Raman scattering (SERS) hybrid system was developed by in-situ deposition of gold nanoparticles (Au NPs) on hydrogen-bonded organic framework (HOF) nanorods. The hybrid system possessed excellent trace SERS detection performance (10 −13 M for rhodamine 6G), attributed to the considerable molecular enrichment capacity of HOFs and the intense local surface plasmon resonance (LSPR) effect of Au NPs. The hot-electron transfer pathway activated by the deposition of Au NPs extremely inhibited the hot carrier recombination and therefore induced a self-cleaning capacity of the hybrid system. Notably, the Au NPs decorated HOFs accomplished trace SERS sensing (10 −10 M) for ciprofloxacin with good self-cleaning and reusable capabilities. This work provides a new material construction strategy for the reusable trace monitoring and green removal of antibiotics, possessed with an enormous application potential in ecological environmental risk prevention.
研究领域:
环境科学
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纳米技术
·
分析化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 2
·185
·
IF 4.034
Junqi Tang,Quanhong Ou,Haichun Zhou,Limin Qi,Shiqing Man
A seed-mediated electroless deposition (SMED) approach for fabrication of large-area and uniform gold nanoparticle films as efficient and reproducible as surface-enhanced Raman scattering (SERS) substrates was presented. This approach involved a seeding pretreatment procedure and a subsequent growth step. The former referred to activation of polylysine-coated glass slides in gold seed solution, and the latter required a careful control of the reactant concentration and reaction time. With the aid of gold seeds and appropriate reaction conditions, a large-area and uniform nanofilm with evenly distributed gold nanoparticles (Au NPs) was formed on the surface of the substrates after adding a mixed solution containing ascorbic acid and trisodium citrate. The morphology of the Au nanofilm was examined by scanning electron microscopy. The size evolution of Au NPs on the surface of the substrates was analyzed in detail. The nanofilm substrate was prepared by reaction conditions of the seeded activation process: 10 mL ascorbic acid and trisodium citrate mixture and 30 min of soaking time, which exhibited an excellent uniformity and reproducibility of SERS enhancement with relative standard deviation (RSD) values of less than 8% (particularly, a RSD value of 3% can be reached for the optimized measurement). Compared to the common electroless deposition, the seed-mediated electroless deposition possessed inherent advantages in controllability, reproducibility, and economic benefit.Keywords:electroless deposition;nanoparticles;nanofilm;SERS;in situ chemical reduction
研究领域:
材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Micro & Nano Letters
·
2018
·Vol. 13
·期 9
·1265-1268
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IF 0.841
Yufei Sun,Liwei Wang,Junhui Liu,Ruoping Li,Mingju Huang
High-quality gold nanorods (GNRs) with different aspect ratios and uniform morphology were synthesised using the seed-mediated growth method. The GNRs were assembled into two different type superstructures: the one is arranged vertically to the substrate (V-GNR superstructure); the other is arranged parallel to the substrate (P-GNR superstructure). Their work at present is devoted to study the Raman enhancement effect and signal repeatability of GNR superstructures. The influence of GNRs arrangement on surface-enhanced Raman scattering (SERS) was investigated experimentally. In addition, the electromagnetic field coupling of GNR superstructures with different arrangement modes was simulated by the finite-different time-domain method. Both experiments and theories have proved that the required resonance wavelength of Raman laser can be obtained by adjusting the aspect ratio of GNRs. Furthermore, the P-GNR superstructure can bring high and repeatable SERS signal intensity of molecules compared with V-GNR superstructure and other nanostructures. It can be concluded that P-GNR superstructure is a good substrate mode for SERS technique.
研究领域:
纳米技术
·
光学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Chemosensors
·
2022
·Vol. 11
·期 1
·22
·
IF 4.229
Xuesong Yan,Wenfeng Zhu,Yibing Wang,Yiran Wang,Dexuan Kong,Min Li
The fabrication of a coffee ring was studied in this work to improve its sensitivity in detecting trace analytes based on surface-enhanced Raman scattering (SERS). Gold nanoparticles were synthesized with diameters of ~40 nm through the sodium citrate reduction method, and rhodamine 6G (R6G) was employed as a probe to evaluate the performance of the fabricated coffee rings. The results showed that the coffee ring formed from the water-washed gold nanoparticles presented more orderly and regular morphology as well as better SERS properties than the unwashed ones. Furthermore, both the concentration and the amount of gold nanoparticles were found to affect its SERS performance. Using the optimized coffee ring as a SERS substrate, trace R6G with a concentration of 5 × 10−8M was detected. This sensing platform could realize aflatoxin B1 (AFB1) detection down to 5 × 10−7M and was demonstrated to function well in real-sample testing.Keywords:coffee ring effect;surface-enhanced Raman scattering (SERS);aflatoxin B1 detection
研究领域:
分析化学
·
食品安全检测
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Kai Liu,Qikui Fan,Zhun Qiao,Zhixue Zhang,Yongzhao Zhang,Zhiqun Chen,Hao Ma,Zemin He,Zongcheng Miao,Jiaofei Huo,Duqiang Xin,Jianxin Guo,Chuanbo Gao
Plate-like metal nanomaterials have attracted much interest due to their anisotropy, high aspect ratio and large surface area. The synthesis of non-noble metal nanocrystals with high purity remains challenging due to the poor regulation mechanism of their seeds, which limits their property and application studies. This paper presents a selective etching mechanism that effectively facilitates the identification and dissolution of non-target seeds during the synthesis of Cu nanoplates. This innovative approach not only enables the production of highly pure nanoplates but also allows for the shape transformation of nanoparticles into nanoplates. The resulting Cu nanoplates exhibit tunable localized surface plasmon resonance (LSPR) characteristics and high enhanced performance in surface-enhanced Raman scattering (SERS). This method offers a novel approach to the synthesis and purification of metal nanocrystals.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Rong Chang,Tao Wang,Qian Liu,Jun Tang,Dongling Wu
Flexible surface-enhanced Raman scattering (SERS) substrates have become one of the research hot spots due to the facile sampling by swabbing or wrapping on rough surfaces and the sensitive and nondestructive detection of contaminants. In this work, we proposed a simple and fast in situ reduction method to prepare Ag nanoparticles (Ag NPs) composited agar hydrogel (Ag NPs@Agar) flexible SERS substrate. Owing to the three-dimensional (3D) structure, good hydrophilicity and adsorption of the agar hydrogel, Ag NPs were grown uniformly in the 3D cross-linked structure. The distribution density of Ag NPs was further increased by the volume shrinkage when the hydrogel was dried in air. This high density and uniformly distribution of Ag NPs produced a large number of highly active SERS regions. In addition, the sensitivity of Ag NPs@Agar was further improved with the assistance of hydrophilic agar gel, which can trap the probe molecules into highly active SERS areas. The SERS results showed that the substrate can be used to detect dye molecules (rhodamine 6G), the minimum detectable concentration was 10–15 M, the relative standard deviation tested at 18 different positions was only 7.58%, and the intensity of the characteristic peak at 611 cm–1 decreased only about 10% after 49 days of storage, demonstrating the superior stability. Moreover, the Ag NPs@Agar substrate also could successfully achieve the micro-trace detection of melamine and sodium penicillin G in Xinjiang specialty camel milk powder. The above available results show that the prepared flexible Ag NPs@Agar SERS substrates possess potentials for the illegal additives and antibiotics in food safety analysis.
研究领域:
材料科学
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分析化学
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食品安全检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Jiaxi Sui,Dongdong Liu,Chunyu Wang,Lijuan Wang,Bo Zhong,Yuanyuan Ma
Non-metallic Surface-Enhanced Raman Scattering (SERS) substrate materials with unique structures are considered as promising candidates for detection of dyes in the environment. In this work, a sea urchin-like K 2 Ti 8 O 17 (KTO) nanomaterial was prepared by a facile and efficient hydrothermal method . The enhancement factors of the sea urchin-like KTO for crystal violet and methylene blue are 3.8 × 10 5 and 2.45 × 10 5 respectively, and the minimum detection limits of both can reach 10 −8 M, which means the sea urchin-like KTO a promising non-metallic SERS substrate for detecting dyes in the environment. The excellent SERS performance of the sea urchin KTO was attributed to the excellent charge transfer and probe adsorption capability of KTO by energy band and zeta potential analysis. Finally, the excellent application potential of the sea urchin KTO was verified by simulating a practical use scenario.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CONTROL
·
2021
·
IF 5.548
Alberta Osei Barimah,Zhiming Guo,Akwasi A. Agyekum,Chuang Guo,Ping Chen,Hesham R. El-Seedi,Xiaobo Zou,Quansheng Chen
Arsenic (As) is one of the toxic, persistent, and lethal heavy metalloids and requires rapid, less costly, and sensitive detection methods. This study proposed a label-free cuprous oxide/silver (Cu 2 O/Ag) surface-enhanced Raman scattering (SERS) nanoprobe to detect total As in tea. Different total As spiked tea concentrations were mixed with the Cu 2 O/Ag SERS nanoprobe for the SERS detection. Quantitative models were established for predicting the total As in tea by comparatively applying chemometric algorithms. Amongst the algorithms, competitive adaptive reweighted sampling partial least squares (CARS-PLS) optimized the most effective spectral variables to predict the total As in tea efficiently. The CARS-PLS gave the highest correlation coefficient value (R p = 0.9935), very low root means square error (RMSEP = 0.0496 μg g −1 ) in the prediction set and recorded the highest RPD value of 8.819. The proposed nanoprobe achieved a lower detection limit (0.00561 μg g −1 ), excellent selectivity, satisfactory reproducibility, and stability. No significant difference was recorded when the performance of the Cu 2 O/Ag total As SERS sensor was compared with the inductively coupled plasma mass spectrometry (ICP-MS) method. Therefore, this developed Cu 2 O/Ag coupled chemometrics SERS sensing method could be used to efficiently determine, quantify, and predict total As in tea to promote monitoring of heavy metal contaminants.
研究领域:
食品科学
·
分析化学
·
环境科学
✓ 已验证
DOI
高影响因子
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
·
光谱学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science China-Chemistry
·
2016
·Vol. 59
·期 8
·1045-1050
·
IF 2.429
Zhen Shujun,Wu Tong,Huang Xin,Li Yuanfang,Huang Chengzhi
We report a new strategy to prepare gold nanoflowers (AuNFs) using a two-step seed-mediated method. The as-prepared AuNFs were employed as surface-enhance Raman scattering (SERS) substrates, showing strong signal enhancement. We further found that iodide ions (I – ) could selectively induce the morphological transformation of AuNFs to spheres, resulting in a blue-shift of the localized surface plasmon resonance (LSPR) bands, a color change of the AuNFs solution from blue to red, and decreased SERS activity. This behavior allows the AuNFs to be used in the determination of I – .
研究领域:
纳米技术
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 25
·12069-12076
·
IF 3.925
Hongji Li,Hongda Xu,Jinyue Zhang,Yi Li,Haochen Yu,Yibo Zhao,Dandan Wang,Yunhui Li,Jianwei Zhu
A novel surface enhanced Raman scattering (SERS) substrate was synthesized by wrapping Ag nanoparticles on the surface of the MIL-101 (Fe) shell under the assistance of IP6, and combining with molecular imprinted polymers (MIPs) for the selective detection of 2,6-DCP. In this study, as a stabilizer and linking agent, IP6 can form a chemical bond with MIL-101 (Fe) to decrease the distance between two Ag nanoparticles and generate more “hot spots”. On the other hand, the inositol hexaphosphate (IP6) and MIL-101 (Fe) shell acted as a protective shell layer, preventing Ag nanoparticles from being polluted by the external environment and reduced SERS activity. In addition, the SERS-MIPs can selectively detect the target molecule, avoiding the influence of other interfering substances on the detection effect. The prepared sensor (Ag/IP6@MIL-101 (Fe)@MIPs, AIM@MIPs) presented sensitive SERS properties, and the detection of limit can reach 10−9 M. The AIM@MIPs also presented strong selective detection to the target molecules, and can be applied for practical sample detection. This test provides a potential application in the detection of environmental pollutants.
研究领域:
分析化学
·
环境科学
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS
·
2022
·Vol. 22
·期 5
·1778
·
IF 3.847
Tingting Zhang,Liyun Wu,Junchang Pei,Xuefeng Li,Haowen Li,Frank Inscore
We used surface-enhanced Raman spectroscopy (SERS) for the rapid and sensitive detection and quantification of caffeine in solution. Such a technique incorporated into a portable device is finding wide applications in trace chemical analysis in various fields, including law enforcement, medicine, environmental monitoring, and food quality control. To realize such applications, we are currently developing portable and handheld trace chemical analyzers based on SERS, which are integrated with a sensor embedded with activated gold nanoparticles in a porous glass matrix. In this study, we used this gold SERS-active substrate to measure aqueous solutions of the drug caffeine as a test chemical to benchmark sensor performance by defining sensitivity (lowest measured concentration (LMC) and estimated limit of detection (LOD)), determining concentration dependence and quantification capabilities by constructing calibration curves; by evaluating the effects of pH values of 3, 7, and 11; and by examining the reproducibility of the SERS measurements. The results demonstrate that the SERS sensor is sensitive, with caffeine detected at an LMC of 50 parts per billion (ppb) with an LOD of 0.63 ppb. The results further show that the sensor is very stable and can be used to make reproducible measurements, even under extremely acidic to basic pH conditions. Vibrational assignments of all observed SERS peaks are made and reported for the first time for caffeine on a gold substrate.Keywords:surface-enhanced Raman sensor;SERS;trace chemical detection;Au nanoparticles
研究领域:
分析化学
·
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
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