Using silicon-coated gold nanoparticles to enhance the fluorescence of CdTe quantum dot and improve the sensing ability of mercury (II)

Zhu, Jian; Chang, Hui; Li, Jianjun; Li, Xin; Zhao, Jing

doi:10.1016/j.saa.2017.06.038

Cited by 24 publications

(12 citation statements)

References 47 publications

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“…The absorption band of gold nanoparticles in the UV-visible spectrum is relatively wide, and the extinction coefficient increases with increases in the gold nanoparticle size [77]. Because the gold nanoparticle extinction coefficient is much higher than that of traditional chromophores, it can be used as a strong acceptor to quench the fluorescence of the donor [78,79]. This characteristic is often applied in fluorescence resonance energy transfer or inner-filter fluorescence sensing to detect proteins [80,81], nucleic acids [82], pesticide residues [83,84], heavy metal ions [85,86], and environmental pollutants [87,88].…”

Section: Optical Properties Of Gold Nanoparticlesmentioning

confidence: 99%

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Liu

Huang

et al. 2018

Sensors

156

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Due to their unique optical properties, narrow size distributions, and good biological affinity, gold nanoparticles have been widely applied in sensing analysis, catalytic, environmental monitoring, and disease therapy. The color of a gold nanoparticle solution and its maximum characteristic absorption wavelength will change with the particle size and inter-particle spacing. These properties are often used in the detection of hazardous chemicals, such as pesticide residues, heavy metals, banned additives, and biotoxins, in food. Because the gold nanoparticles-colorimetric sensing strategy is simple, quick, and sensitive, this method has extensive applications in real-time on-site monitoring and rapid testing of food quality and safety. Herein, we review the preparation methods, functional modification, photochemical properties, and applications of gold nanoparticle sensors in rapid testing. In addition, we elaborate on the colorimetric sensing mechanisms. Finally, we discuss the advantages and disadvantages of colorimetric sensors based on gold nanoparticles, and directions for future development.

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Section: Optical Properties Of Gold Nanoparticlesmentioning

confidence: 99%

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Liu

Huang

et al. 2018

Sensors

156

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“…The prepared 4-MBA tagged Au@Ag@SiO 2 nanoparticles were centrifuged and dispersed in 40 mL of ethanol. Then, the system was added with 20 μL of APTMS and stirred for 4 h in a 65 °C oil bath . The aminated Au@Ag@SiO 2 nanoparticles were centrifuged and then were dispersed with 16 mL of water.…”

Section: Experiments and Methodsmentioning

confidence: 99%

“…Then, the system was added with 20 μL of APTMS and stirred for 4 h in a 65 °C oil bath. 36 The aminated Au@Ag@SiO 2 nanoparticles were centrifuged and then were dispersed with 16 mL of water.…”

Section: Experiments and Methodsmentioning

confidence: 99%

Growth of Spherical Gold Satellites on the Surface of Au@Ag@SiO₂ Core–Shell Nanostructures Used for an Ultrasensitive SERS Immunoassay of Alpha-Fetoprotein

Yang

Zhu

Zhao

et al. 2019

ACS Appl. Mater. Interfaces

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The identification and detection of cancer biomarkers in early stages is an important issue for the therapy of cancer. However, most methods are time-consuming and have limited sensing sensitivity and specificity. In this work, we prepared a novel plasmonic multilayered core–shell–satellite nanostructure (Au@Ag@SiO2–AuNP) consisting of a gold nanosphere with a silver coating core (Au@Ag), an ultrathin continuous silica (SiO2) shell, and a high coverage of gold nanosphere (AuNP) satellites. The Au@Ag core is a prominent surface enhanced Raman scattering (SERS) platform, and the thin SiO2 layer exhibits a long-range plasmon coupling between the Au@Ag core to the AuNP satellites, further leading to enhanced Raman scattering. Meanwhile, the outer AuNP satellites have a high biocompatibility and long-term stability. Combining the above advantages, the well-designed metallic nanoassemblies would be a promising candidate for SERS-based applications in biochemistry. For specific detection of alpha-fetoprotein (AFP), we utilized the SERS-active core–shell–satellite nanostructures modified with AFP antibody as immune probes and nitrocellulose membrane (NC) stabilized captured anti-AFP antibodies as solid substrate. To improve the detection performance, we further systematically optimized the parameters, including the silver coating thickness of the Au@Ag core and the density and size of the satellite AuNPs. Under the optimized conditions, AFP could be detected by the SERS-based sandwich immunoassay with an ultralow detection limit of 0.3 fg/mL, and the method exhibited a wide linear response from 1 fg/mL to 1 ng/mL. The limit of detection (LOD) was considerably lower than conventional methods in the literature. This work relies on the unique Au@Ag@SiO2–AuNP nanostructures as the immune probe develops a new outlook for the application of multilayered nanoassemblies and demonstrates the great potential in early tumor marker detection.

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“…Two examples of such supra-NP assemblies are shown in Figure . , These configurations can be achieved by covalent coupling, coordinate interactions, and electrostatic interactions. Examples include SiO 2 NP@QDs, ,− Au NP/SiO 2 @QDs, − Ag NP/SiO 2 @Au NCs, UCNP/SiO 2 @QDs, UCNP/SiO 2 @Au NPs, DDSNP@Au NPs, QD@Au NPs, QD-doped SiO 2 NP@CDs, IONP@Au NCs, IONP/SiO 2 @QDs, , IONP/SiO 2 @CQDs, and polymer NP@IONPs@QDs . It is commonplace, particularly with combinations of plasmonic NPs and LNPs, for there to be an intervening silica layer between the core and satellites. ,, In some cases, the assembled satellite NPs are also embedded in a silica shell around the core to render the assembly more robust. ,− , …”

Section: Catalog Of Materialsmentioning

confidence: 99%

“…The most common motivations for combinations of LNPs and plasmonic NPs are plasmon-induced changes or enhancements in the PL properties of the LNP ( e.g. , MEF, ,,, as shown in Figure ) and multimodal imaging. , With regard to the latter, PL measurements or imaging via the LNP is pairable with dark-field imaging ( e.g. , via the strong light scattering of Au NPs), , photoacoustic imaging and/or photothermal therapy ( e.g.…”

Section: Catalog Of Materialsmentioning

confidence: 99%

Photoluminescent Nanoparticles for Chemical and Biological Analysis and Imaging

et al. 2021

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Research related to the development and application of luminescent nanoparticles (LNPs) for chemical and biological analysis and imaging is flourishing. Novel materials and new applications continue to be reported after two decades of research. This review provides a comprehensive and heuristic overview of this field. It is targeted to both newcomers and experts who are interested in a critical assessment of LNP materials, their properties, strengths and weaknesses, and prospective applications. Numerous LNP materials are cataloged by fundamental descriptions of their chemical identities and physical morphology, quantitative photoluminescence (PL) properties, PL mechanisms, and surface chemistry. These materials include various semiconductor quantum dots, carbon nanotubes, graphene derivatives, carbon dots, nanodiamonds, luminescent metal nanoclusters, lanthanidedoped upconversion nanoparticles and downshifting nanoparticles, triplet−triplet annihilation nanoparticles, persistent-luminescence nanoparticles, conjugated polymer nanoparticles and semiconducting polymer dots, multi-nanoparticle assemblies, and doped and labeled nanoparticles, including but not limited to those based on polymers and silica. As an exercise in the critical assessment of LNP properties, these materials are ranked by several application-related functional criteria. Additional sections highlight recent examples of advances in chemical and biological analysis, point-of-care diagnostics, and cellular, tissue, and in vivo imaging and theranostics. These examples are drawn from the recent literature and organized by both LNP material and the particular properties that are leveraged to an advantage. Finally, a perspective on what comes next for the field is offered.

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Using silicon-coated gold nanoparticles to enhance the fluorescence of CdTe quantum dot and improve the sensing ability of mercury (II)

Cited by 24 publications

References 47 publications

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Growth of Spherical Gold Satellites on the Surface of Au@Ag@SiO₂ Core–Shell Nanostructures Used for an Ultrasensitive SERS Immunoassay of Alpha-Fetoprotein

Photoluminescent Nanoparticles for Chemical and Biological Analysis and Imaging

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Using silicon-coated gold nanoparticles to enhance the fluorescence of CdTe quantum dot and improve the sensing ability of mercury (II)

Cited by 24 publications

References 47 publications

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Application of Gold-Nanoparticle Colorimetric Sensing to Rapid Food Safety Screening

Growth of Spherical Gold Satellites on the Surface of Au@Ag@SiO2 Core–Shell Nanostructures Used for an Ultrasensitive SERS Immunoassay of Alpha-Fetoprotein

Photoluminescent Nanoparticles for Chemical and Biological Analysis and Imaging

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Product

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Growth of Spherical Gold Satellites on the Surface of Au@Ag@SiO₂ Core–Shell Nanostructures Used for an Ultrasensitive SERS Immunoassay of Alpha-Fetoprotein