A sensitive and rapid UV–vis spectrophotometry for organophosphorus pesticides detection based on Ytterbium (Yb3+) functionalized gold nanoparticle

Li, Yuan; Luo, Qingjiao; Hu, Rong; Chen, Zongbao; Qiu, Ping

doi:10.1016/j.cclet.2018.11.016

Cited by 25 publications

(6 citation statements)

References 34 publications

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“…At 520 nm a peak was observed, which suggested that the size of the obtained PTFE-AuNP particles was approximately 20 nm. The similar findings were done by Li et al, who obtained size of particles AuNP equal 20 nm using TEM analysis and noticed 520 nm band in UV-Vis [22]. In addition, Xing et al synthesized graphene oxide/AuNP composite (GO/AuNP) and reported the absorption peak at 520 nm (UV-Vis) for 20 AuNP as well [23].…”

Section: Ultraviolet-visible Spectrophotometry (Uv-vis)supporting

confidence: 76%

Synthesis of polymer-grafted gold nanoparticles via gamma radiation

Mokhtar¹,

Hidzir²,

Rahman³

et al. 2021

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The research focused on the synthesis of poly(tetrafluoroethylene) (PTFE) grafted with gold nanoparticles (AuNP). The Turkevich method, one of the common techniques of AuNP synthesis, was used to obtain an AuNP solution with a nanoparticle size of 20 nm. The PTFE-AuNP samples were subsequently irradiated and the absorbed doses were 0.5, 2, 5, 10 and 20 kGy. It was noticed that samples irradiated with 0.5 and 2 kGy were less stable and less concentrated than samples irradiated with higher doses due to aggregation and formation of precipitation after 30 days.

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Section: Ultraviolet-visible Spectrophotometry (Uv-vis)supporting

confidence: 76%

Synthesis of polymer-grafted gold nanoparticles via gamma radiation

Mokhtar¹,

Hidzir²,

Rahman³

et al. 2021

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“…Grzelczak et al realized binary self-assembly of gold nanowires with nanospheres and GNRs . Through modulating by using polymer brush coatings, DNA double helices, and metal–metal/π–π interactions, various freestanding GNRs assemblies can be well obtained. − Furthermore, these GNRs-based self-assembly systems, either assembly↔disassembly transformation or resulting assemblies, have been employed for the studies of sensing, detecting, imaging, catalyzing through the coupling effects of GNRs’ LSPR themselves or with LSPR and fluorescence/Raman scattering/circular dichroism. − However, just like any other NCs, for GNRs, while their self-assembly studies have obtained substantial achievements in the aspects of superstructure construction, property manipulation, and various application exploration; the self-assembly mechanism research cannot obviously keep up with the pace, ascribed to the lack of appropriately quantitative approaches for the corresponding study. It is rather difficult to demonstrate the precise chemical/supramolecular pictures at both the NCs’ surface and interbuilding blocks during self-assembly, except for a few limited systems (for example, DNA-functionalized building blocks self-assemble by Watson–Crick interactions). , …”

Section: Introductionmentioning

confidence: 99%

Thiols Modulated Gold Nanorods Self-Assembly: Indirect Hydrophobic Effects Instead of Direct Electrostatic/Hydrogen Bonds Attraction

Lin,

Wu,

Zhou

et al. 2024

Langmuir

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For nanocrystals (NCs) self-assembly, understanding the chemical and supramolecular interactions among building blocks is significant for both fundamental scientific interests and rational nanosuperstructure construction. However, it has remained an extreme challenge for many self-assembly systems due to the lack of appropriately quantitative approaches for the corresponding exploration. Herein, by combination of the proposed colorimetric method for cationic surfactant quantitation and all-atom simulations, we manage to present a clear chemical picture for the thiol molecules modulated selfassembly of gold nanorods (GNRs), one of the earliest and most convenient methods for the fabrication of freestanding GNR self-assemblies. It is revealed that the self-assembly of GNRs is driven by the hydrophobic effects of the alkyl chains of the modified cationic surfactants, as their bilayer structure is destroyed by the added thiol molecules. In other words, the actual roles of the thiol molecules for causing GNRs assembly are indirectly inductive effects instead of the previously believed direct electrostatic attraction and/or hydrogen-bond linking effects of the binding thiol molecules. Furthermore, the GNRs exhibit diameter-dependent assembly behaviors: thicker GNRs tend to adopt the end-to-end assembly mode, while thin ones prefer the side-by-side assembly mode, further demonstrating that hydrophobic effects among the build blocks are the driving force for the GNRs assembly.

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“…Increasingly, people have become aware of the pesticide residue problem, and the detection technology of pesticide residues has been developed rapidly. Many analytical methods could detect pesticide residues, including electrochemical analysis method, 6 high performance liquid chromatography, 7 ultraviolet absorption spectroscopy, 8 fluorescence spectrophotometry, 9 colorimetric method, 10 gas chromatography, 11 mass spectrometry, 12 immunoassay 13 and others. However, there may be shortcomings to the above methods, including high cost and error risk, professional operation, lack of mobility and difficulty in field analysis.…”

Section: Introductionmentioning

confidence: 99%