Journal of Physical Chemistry C
·
2023
·
IF 3.7
Yunrui Han,Yingkuan Han,Qihang He,Hong Liu,Yu Zhang,Lin Han
Low-concentration molecular detection is of great value in chemical analysis, environmental monitoring, biological analysis, and other trace detection fields. Surface-enhanced Raman scattering (SERS) is widely used in the analysis of low-concentration molecules with great potential for biological detection due to nondestructive measurement. However, detection uniformity and repeatability are challenges in the application of SERS, especially as regards ultrasensitive detection. Here, a AgNPs@LIG SERS chip with excellent sensitivity and uniformity was fabricated by electroplating Ag nanoparticles (AgNPs) on a laser-induced graphene (LIG) surface prepared on a polyimide (PI) film, which realized large-scale production with controllable shape and area. Such an SERS chip features a limit of detection (LOD) of 10–14 M, an enhancement factor (EF) of 3 × 1010, and fine uniformity (∼9.6% relative standard deviation) for rhodamine 6G, benefiting from excellent local electromagnetic field enhancement generated by the gap of AgNPs and excellent performance of porous LIG. Finally, the chip was applied to the detection of melamine with the LOD of 10–9 M, which confirmed the potential application value of the SERS chip for pollutant analysis. In addition, the preparation of the composite SERS chip is simple for mass production, which provides great potential for the development of ultrasensitive SERS biosensors for various biological and chemical analyses.
研究领域:
化学分析
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环境监测
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生物分析
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2017
·
IF 6.216
Yuanyuan Liu,Shengyang Yang,Su-Na Yin,Ligang Feng,Yang Zang,Huaiguo Xue
Methanol has been deemed to be a favorable medium for the source of hydrogen because its liquid nature facilitates the storage, transportation, and utilization of hydrogen. Currently, steam reforming is the most common method to generate hydrogen from methanol in chemical industry and hydrogen fuel cell field. However, methanol reforming often involves high temperature and pressure, massive capital investment, as well as undesirable byproducts (CO, CO 2 , etc.) formation. To overcome these disadvantages, in this work, we describe an in situ assembly and stepwise thermal treatment method to synthesize fibrous AgNPs/g-C 3 N 4 aerogel, which exhibits efficient photocatalysis activity for the splitting of pure methanol at room temperature. Encouragingly, hydrogen is continuously produced while neither CO nor CO 2 is found in the products, which could be attributed to the moderate redox feature of silver in the AgNPs/g-C 3 N 4 aerogel. More importantly, this CO x -free hydrogen evolution process can prevent the poisoning of catalysts, opening a new opportunity for developing low-carbon chemistry.
研究领域:
材料科学
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化学工程
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环境科学
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DOI
高影响因子
TALANTA
·
2024
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IF 5.6
Zhihao Li,Zhuang Ding,Zilong Yan,Konghao Han,Maofeng Zhang,Hongyang Zhou,Xu Sun,Hui Sun,Jianhua Li,Wei Zhang,Xiaohong Liu
The ubiquity of plastic products has led to an increased exposure to micro and nano plastics across diverse environments, presenting a novel class of pollutants with substantial health implications. Emerging research indicates their capacity to infiltrate human organs, posing risks of tissue damage and carcinogenesis. Given the prevalent consumption of beverages as a primary vector for these plastics' entry into the human system, there is an imperative need for the advancement of precise detection methodologies in liquids. In this study, we introduce a substrate comprising a Nickel Oxide (NiO) nanosheet array decorated with Silver Nanoparticles (AgNPs) for the Surface-Enhanced Raman Spectroscopy (SERS) analysis of micro//nano plastics. This configuration, leveraging a unique nanowell architecture alongside silver plasmonic enhancement, demonstrates unparalleled sensitivity and repeatability in signal, facilitating the accurate quantification of these contaminants. Through the application of a portable Raman apparatus, this study successfully identifies prevalent micro/nano plastics including polystyrene (PS), polyethylene (PE), and polypropylene (PP), achieving detection sensitivities of 5 μg/mL, 25 μg/mL, and 25 μg/mL, respectively. Moreover, the substrate's efficacy extends to the detection of PS within commonly consumed beverages such as water, milk, and liquor with sensitivities of 25 μg/mL, 50 μg/mL, and 50 μg/mL, respectively. These findings highlight the substrate's potential as an expedient and effective sensor for the real-time monitoring of micro/nano plastic pollutants.
研究领域:
环境科学
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材料科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Dingkun Yang,Yu Lei,Zhou Fan,Weigen Chen,Fu Wan
Surface-enhanced Raman scattering (SERS), functioning as a highly sensitive trace detection tool, has gained popularity as an analytical technique and is extensively employed in diverse domains such as electrical engineering. In this paper, the exploration is conducted regarding the application of surface-enhancement technology in the quantitative detection of the aging characteristics of transformer oil-paper insulation. Flower-like silver nanoparticles (AgNPs) were deposited in situ on a copper foil coated with porous graphene, thereby fabricating a Cu-graphene (porous)-AgNPs surface-enhanced substrate. This substrate effectively prevented the oxidation of nanoparticles while maintaining the SERS activity. By creating apertures in graphene, the adsorption capability of the substrate for organic small molecules like furfural was enhanced, and the size of silver nanoparticles was optimized to achieve better detection outcomes. The performance of the substrate was evaluated using R6G as the probe molecule, and the findings indicated that the substrate exhibited excellent sensitivity, uniformity (RSD values are below 10 %), and antioxidant properties (after 30 days, the peak strength decreased by 8.23 %). When this substrate was utilized for the detection of transformer aging characteristics, the detection limits for furfural, acetone, and methanol reached 0.04 mg/L, 0.18 mg/L, and 0.18 mg/L respectively, fulfilling the analytical requirements of oil-immersed transformers. This research holds significant importance in guaranteeing the stable operation of the power supply system and the smooth development of the national economy.
研究领域:
电气工程
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材料科学
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分析化学
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Minghao Li,Chunhui Chen,Wenqing Hai,Ziyang Jiang,Qian Meng,Enquan Hao,Hongjie Li,Huiqi Shao,Guangwei Shao,Jinhua Jiang,Nanliang Chen,Siyi Bi
In order to comply with the requirement of flame retardancy and electromagnetic interference (EMI) shielding for encapsulant applied to electronic devices, multifunctional thermoplastic polyurethane (TPU) composites are prepared with the construction of an intumescent flame retardant (IFR) system comprising internal conductive network. In this work, ammonium polyphosphate wrapped with MXene (MXene@APP) is attained by microencapsulation, and expandible graphite decorated with Ag nanoparticles (AgNPs@EG) is prepared by the reducibility of silk sericin. The IFR system with conductivity is established by the introduction of MXene@APP, AgNPs@EG and furfural-derived Schiff base (FDS). The as-prepared TPU/MXene@APP/FDS/AgNPs@EG composites are able to attain significant elevation in flame retardancy, exhibiting V-0 rating and a LOI value of 33.1 %. Furthermore, TPU composites are integrated with warp-knitted metal mesh (WMM) to fabricate TPU@WMM coated fabric, displaying strengthened electromagnetic interference (EMI) shielding effectiveness (SE) of 37.53 dB within X band. This work provides a potential method for application in encapsulant with flame retardancy and electromagnetic protection.
研究领域:
材料科学
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高分子化学
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产品关联
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
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2023
·Vol. 25
·期 2
·1-14
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IF 2.5
Ding Jianjun,Ye Li,Su Tong,Guo Naiyu,Yu Linbo,Miao Longxin,Cao Mian,Sun Chao
Surface-enhanced Raman scattering (SERS) features a unique fingerprint spectrum for fast and highly sensitive non-destructive detection without sample pretreatment. Aiming at the problem of few “hot spot” and uneven distribution of traditional SERS substrate, in this work, a surface-enhanced Raman substrate of silica/carbon nanotubes/silver nanoparticles (SiO 2 /CNTs/AgNPs) with high on all sides and low in the middle was synthesized by hydrothermal synthesis. The AgNPs were characterized by transmission electron microscopy (TEM), and the average diameter was 38 nm to 63 nm. The substrate exhibited high sensitivity, stability, and uniformity with a detection limit of 10 −12 M for rhodamine 6G (R6G). Furthermore, we conducted an in-depth research on the enhancement contribution of the substrate by finite-difference time-domain (FDTD); the simulation results were in good agreement with the experimental results. Finally, the substrate was used for the detection of phenol red in water; the results showed that the Raman intensity was exponentially related to the concentration of phenol red solution with the coefficient of determination R 2 = 0.99991, which provided a new method for detecting water pollutants. Graphical Abstract
研究领域:
分析化学
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环境科学
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纳米技术
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产品关联
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
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2022
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IF 6.064
Zheng Laibao,Shen Yunqiu,Dong Wenjia,Zheng Chaochuan,Zhou Ruolan,Lou Yong-Liang
Rapid detection of pathogens and assessment of antimicrobial susceptibility is of great importance for public health, especially in resource-limiting regions. Herein, we developed a rapid, portable, and universal detection method for bacteria using AgNPs-invertase complexes and the personal glucose meter (PGM). In the presence of bacteria, the invertase could be released from AgNPs-invertase complexes where its enzyme activity of invertase was inhibited. Then, the enzyme activity of invertase was restored and could convert sucrose into glucose measured by a commercially PGM. There was a good linear relationship between PGM signal and concentration of E. coli or S. aureus as the bacteria model with high sensitivity. And our proposed biosensor was proved to be a rapid and reliable method for antimicrobial susceptibility testing within 4 h with consistent results of Minimum Inhibitory Concentrations (MICs) testing, providing a portable and convenient method to treat infected patients with correct antibiotics and reduce the production of antibiotic-resistant bacteria, especially for resource-limiting settings.
研究领域:
微生物学
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医学诊断
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生物传感器技术
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Ruyue Guo,Yan Bao,Junbin Zhou,Jie Chen,Xinjie Li,Chao Liu,Wenbo Zhang
The synergistic advantages of high conductive and histology-like properties of hydrogel make it promising candidate for flexible electronic devices. However, it still remains huge challenge to build conductive hydrogel with high sensing performance and versatility. Herein, a platform of multifunctional organohydrogel was tailored by dual-mode conduction and tannic acid‑silver system, which demonstrated excellent mechanical, conductive, antibacterial, freezing tolerance, moisture retention and sensing capabilities. Thanks to the multiple energy dissipation by the synergistic effect between different components during deformation, the average stress and strain of organohydrogel were 6.18 ± 0.313 MPa and 695.15 ± 25.956 %, respectively. At the same time, the combination of tannic acid and silver guaranteed the antibacterial property of organohydrogel, which was an advantage as flexible sensor for long-term human-machine interface contact without worrying about bacterial growth. Moreover, the organohydrogel exhibited freezing tolerance and moisture retention performances based on the ability of water/glycerin binary solvents to inhibit ice crystal growth and water evaporation, laying the foundation for its long-term stability in harsh environments. In addition, the construction of dual-mode conduction and the corresponding structural changes of organohydrogel during deformation resulted in excellent average conductivity of 19.70 ± 0.145 S m −1 and strain sensitivity of 17.10. It enabled organohydrogel to act as flexible sensor to realize coding language communication, real-time monitoring of wrist pulse and collecting pressure information in space. In summary, a multifunctional organohydrogel was developed, which provided feasible and promising strategy for the enhanced performance and modified function of conductive hydrogel.
研究领域:
材料科学
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纳米技术
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生物医学工程
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柔性电子学
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传感器
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2023
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IF 4.4
Bin Yang,Jia Liu,Fengming Zhang,Yuting Wang,Xin Liu,Shiyue Niu,Yue Yuan,Shuyun Bi
A highly sensitive surface-enhanced Raman spectroscopy approach was established for the detection of dextromethorphan hydrobromide (DXM) utilizing nano CuO modified silver nanoparticles (CuO@AgNPs) as substrate. Ultraviolet visible spectra (UV-vis), X-ray diffraction (XRD) and transmission electron microscopy (TEM) characterized the synthesized CuO@AgNPs. UV-vis and fourier transform infrared (FT-IR) were adopted to investigate the interaction between DXM and CuO@AgNPs. The optimal experimental conditions (the dosages of CuO@AgNPs and NaCl as well as mixing time) were explored. The enhancement factor (EF) was 1.71 × 10 6 . The linear relationship between SERS intensity and the concentration of DXM in the range of 67 – 1000 nmol L −1 was obtained as I SERS = 25.81 c + 40398.77, and the limit of detection (LOD) was 2.12 nmol L −1 (S/N = 3). The interference of K + , Mg 2+ , Zn 2+ , Ca 2+ , Cu 2+ , Fe 3+ , glucose, HSA, L-tryptophan, soluble starch and ibuprofen were investigated. The method was successfully applied to test DXM in serum samples. The recovery was 99.06% – 101.51% with the relative standard deviation (RSD) of 0.74% – 3.87%.
研究领域:
分析化学
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药学
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产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2021
·
IF 7.514
Zhiwen Qi,Xingying Xue,Hao Zhou,Hua Yuan,Wenjun Li,Guliang Yang,Pujun Xie,Chengzhang Wang
To valorise olive mill wastewater phenols (OPs) potentially applied in food preservation, a novel stable and regularly spherical OPs-AgNPs ( D avg = 78 nm) were successfully assembled in aqueous solution under the optimized conditions (pH 8.0, 5 mM AgNO 3 , 35C and 30 min). The results of antimicrobial zone diameters indicated that 50 μg/mL of promising OPs-AgNPs presented excellent antimicrobial effects. Especially, the cell wall damages of E. coli ATCC 23,815 were caused when OPs-AgNPs concentration was exceeded its MIC (8.58 μg/mL). Also, a significant down-regulating of the Ca 2+ -ATPase activity in E. coli was revealed, and the intracellular Ca 2+ concentrations were thus decreased from 12.5 to 1.35 µg/mL after a treatment for 3 h. The apoptosis level of E. coli was significantly increased more than the control (55.13% of OPs-AgNPs vs 9.90% of control). In sum, OPs exerts enhanced antimicrobial function via penetrating cell membrane and targeting Ca 2+ -ATPase after chelated with AgNPs.
研究领域:
环境科学
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材料科学
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微生物学
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食品科学
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产品关联
DOI
PubMed
高影响因子
LUMINESCENCE
·
2025
·Vol. 40
·期 2
·e70106
·
IF 3
Mingyu Zhang,Yizhuo Tian,Sijia Liu,Yu Wang,Haiyan Li,Yafei Chen,Qing Gao,Xinli Wang,Mingli Chen
A multifunctional surface-enhanced Raman scattering substrate Fe 3 O 4 @AgNPs@MIL-101 was prepared. Rapid SERS detection of pesticide residues was realized by direct pre-enrichment and separation on the peel surface. MIL-101 has an ortho-octahedral framework and large pore size, which endowed Fe 3 O 4 @AgNPs@MIL-101 with the ability to rapidly adsorb and separate positively charged targets. The introduction of tannic acid realized the in situ growth of AgNPs on the backbone, to modulate the electromagnetic enhancement. Pesticide molecules were adsorbed onto the surface of AgNPs mediated by central S atoms, accompanied by the interaction between pesticide molecules and AgNPs, the corresponding SERS signals of different pesticides were observed. Together with the introduction of magnetic coating Fe 3 O 4 , the molecules were enriched in the hotspot and separated to further enhance the SERS performance. Magnet instead of centrifugation was used to simultaneously perform surface extraction and sample separation for a noninvasive, rapid, immediate, and portable assay. The method was accomplished in measurement of thiram and thiabendazole on apple and tangerine epidermis, and the limits of detection (LODs) were 20 ng/cm 2 and 4 μg/cm 2 , respectively. The recovery was reasonable, and it showed that the procedure is valuable for the rapid and nondestructive surface analysis of residual chemicals.
研究领域:
分析化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2025
·
IF 4.5
Luoxin Li,Wei Xiao,Lianjie Lu,Luntao Xia,Chenhe Shao,Yong Huang,Xin Liu,Zhenjin Xu,Qibin Zhuang,Zhengmao Ding,Dezhi Wu
Real-time monitoring of bearing operational status is critical for mechanical equipment safety. However, integrated temperature-strain sensors often encounter crosstalk between signals, which affects the accuracy and stability of measurements. Achieving precise in-situ monitoring of bearing temperature and strain conditions remains a significant technical challenge. Here, highly linear and stable AgNPs thin-film temperature sensors (AgNPs TFTSs) and AgNPs microcrack thin-film strain gauges (AgNPs MTFSGs) are proposed using laser-assisted printing technology, which are capable of accurately acquiring condition parameters of bearing. The printed AgNPs TFTS exhibited a low hysteresis error of 2.6 % and a high linearity of 0.999. The microcracks in AgNPs MTFSG were induced by ultraviolet (UV) laser, yielding a significant enhancement of the gauge factor (GF) from 1.03 (baseline) to 3.19. This twofold sensitivity improvement was achieved while maintaining excellent linearity (R²=0.997). In particular, these thin-film sensors exhibited good stability even when applied to bearings. Typically, AgNPs TFTS and AgNPs MTFSG maintained a low resistance drift rate of 0.012 %/h and a repeatability error of 2.1 % respectively, demonstrating broad adaptability. In addition, both AgNPs TFTS and AgNPs MTFSG exhibited excellent dynamic and static response characteristics. This provides a method for the direct in-situ fabrication of thin-film sensors with high linearity and high stability on mechanical components, such as gears, bolts, and so on.
研究领域:
材料科学
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传感器技术
·
机械工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）