Size-tunable Au@Ag nanoparticles for colorimetric and SERS dual-mode sensing of palmatine in traditional Chinese medicine

Gao, Yaohui; Hu, Ziwei; Wu, Jia‐Min; Ning, Zan; Jian, Jingyi; Zhao, Ting; Liang, Xiaochen; Yang, Xingjie; Yang, Zhenghong; Zhao, Qinyu; Wang, Jianping; Wang, Zhigang; Dina, Nicoleta Elena; Gherman, Ana Maria Raluca; Jiang, Zhengjin; Zhou, Haibo

doi:10.1016/j.jpba.2019.05.045

Cited by 26 publications

(9 citation statements)

References 40 publications

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“…The intensity of the color is linearly proportional to palmatine concentration from 0.096 µM to 0.288 µM. This rapid and selective sensor can be promising for palmatine detection in clinical samples [127].…”

Section: Colorimetric Sensors Based On Ag/au Bimetallic Np Aggregationmentioning

confidence: 89%

Gold and Silver Nanoparticle-Based Colorimetric Sensors: New Trends and Applications

et al. 2021

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Gold and Silver nanoparticles (AuNPs and AgNPs) are perfect platforms for developing sensing colorimetric devices thanks to their high surface to volume ratio and distinctive optical properties, particularly sensitive to changes in the surrounding environment. These characteristics ensure high sensitivity in colorimetric devices. Au and Ag nanoparticles can be capped with suitable molecules that can act as specific analyte receptors, so highly selective sensors can be obtained. This review aims to highlight the principal strategies developed during the last decade concerning the preparation of Au and Ag nanoparticle-based colorimetric sensors, with particular attention to environmental and health monitoring applications.

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Section: Colorimetric Sensors Based On Ag/au Bimetallic Np Aggregationmentioning

confidence: 89%

Gold and Silver Nanoparticle-Based Colorimetric Sensors: New Trends and Applications

et al. 2021

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“…The solution was transferred into a 50 mL high-pressure reactor, and gradually heated to 200 • C in an electric blast-drying oven for 8 h, then the kettle was taken out to cooled to room temperature. The Fe 3 O 4 solution was poured into a beaker to separate the Fe 3 O 4 nanoparticles from it by an external magnetic field, and the Fe 3 O 4 nanoparticles were dried in a vacuum-drying oven at 60 • C for 6 h to obtain Fe 3 O 4 magnetic nanoparticles after being washed alternately with ultrapure water and anhydrous ethanol 3~4 times [36][37][38].…”

Section: Synthesis Of Fe 3 O 4 Particlesmentioning

confidence: 99%

Preparation of Fe3O4@PDA@Au@GO Composite as SERS Substrate and Its Application in the Enrichment and Detection for Phenanthrene

Liu

Cao

et al. 2022

Micromachines

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In this study, highly active Fe3O4@PDA@Au@GO surface-enhanced Raman spectroscopy (SERS) active substrate was synthesized for application in the enrichment and detection of trace polycyclic aromatic hydrocarbons (PAHs) in the environment. The morphology and structure were characterized by transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDS), X-ray diffraction (XRD) and UV–visible absorption spectrum (UV–vis spectra). The effect of each component of Fe3O4@PDA@Au@GO nanocomposites on SERS was explored, and it was found that gold nanoparticles (Au NPs) are crucial to enhance the Raman signal based on the electromagnetic enhancement mechanism, and apart from enriching the PAHs through π–π interaction, graphene oxide (GO) also generates strong chemical enhancement of Raman signals, and polydopamine (PDA) can prevent Au from shedding and agglomeration. The existence of Fe3O4 aided the quick separation of substrate from the solutions, which greatly simplified the detection procedure and facilitated the reuse of the substrate. The SERS active substrate was used to detect phenanthrene in aqueous solution with a detection limit of 10−7 g/L (5.6 × 10−10 mol/L), which is much lower than that of ordinary Raman, it is promising for application in the enrichment and detection of trace PAHs.

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“…Thanks to the real-time and ultrasensitive detection of molecules in trace amounts, 1 , 2 surface-enhanced Raman scattering (SERS) as an up-and-coming technique has been commonly used in various applications, including biosensors, 3 − 5 medicine technology, 6 , 7 plasmon-driven catalytic reactions, 8 − 16 etc. To realize these applications, as a suitable SERS substrate, there should be high-density hotspots that result from strongly enhanced electromagnetic fields caused by the localized surface plasmon resonance (LSPR).…”

Section: Introductionmentioning

confidence: 99%

Silver Nanopillar Arrayed Thin Films with Highly Surface-Enhanced Raman Scattering for Ultrasensitive Detection

et al. 2022

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Surface-enhanced Raman scattering (SERS) technique based on surface plasmon resonance has been considerably investigated in recent years due to its superior sensitivity in the detection of organic or biological molecules at trace levels. However, most research usually focuses on artificial architectures as SERS substrates that always have a complex and expensive micro-nanofabrication process. The high cost of masks for SERS substrates becomes a key obstacle for the widespread commercialization of SERS technology. In this paper, a biomimetic SERS substrate composed of silver-coated nanopillar arrays on the top of a cicada wing was advanced to overcome these challenges as both substrates and masks. Benefiting from the high near-field plasmon resonance coupling at the limited space among neighboring nanopillars, a dramatically increased SERS signal can be achieved using rhodamine 6G (R6G) as a model molecule. Encouragingly, the analytical enhancement factor of the order of more than 10 8 has been conveniently realized with a reliable detection concentration of R6G of about 100 pM or less. This work provides a promising route for designing cost-effective and highly sensitive SERS substrates and the related mask fabrication using our previously proposed template transfer nanoimprint.

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Size-tunable Au@Ag nanoparticles for colorimetric and SERS dual-mode sensing of palmatine in traditional Chinese medicine

Cited by 26 publications

References 40 publications

Gold and Silver Nanoparticle-Based Colorimetric Sensors: New Trends and Applications

Gold and Silver Nanoparticle-Based Colorimetric Sensors: New Trends and Applications

Preparation of Fe3O4@PDA@Au@GO Composite as SERS Substrate and Its Application in the Enrichment and Detection for Phenanthrene

Silver Nanopillar Arrayed Thin Films with Highly Surface-Enhanced Raman Scattering for Ultrasensitive Detection

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