Fabrication of Au nanoparticles embedded holey g-C3N4 as SERS substrates for sensitive and reliable detection

Tang, Weiyang; An, Yena; Row, Kyung Ho

doi:10.1016/j.cej.2020.126194

Cited by 69 publications

(19 citation statements)

References 48 publications

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“…It has three Raman vibration bands, a disordered (D) peak at ~1345 cm −1 , a graphitic carbon (G) peak at ~1594 cm −1 , and a 2D peak at ~2677 cm −1 under 532 nm laser excitation (Figure 1C), while only a D peak and a G peak were observed on its Raman spectrum under 633 nm laser excitation (Figure 1D). X‐ray photoelectron spectrometer (XPS) characterization results in Figure 1E showed the characteristic peaks of Au4f (83.48 eV for Au4f 7/2 and 87.18 eV for Au4f 5/2 , respectively), [ 50‐51 ] Ag3d (367.58 eV for Ag3d 5/2 and 373.58 eV for Ag3d 3/2 , respectively) [ 52‐53 ] and C1s (283.88 eV). Raman signals of GIAAN's G peak in H 2 O, methanol (Me), cyclohexane ethyl (CH), acetate (EA), petroleum ether (PE) and dichloromethane (DCM) showed little difference before and after 12 h, indicating the superb stability of GIAAN (Figure 1F).…”

Section: Resultsmentioning

confidence: 99%

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging^†

Zhu

Cai

et al. 2021

Chin. J. Chem.

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Surface-enhanced Raman spectroscopy | Graphene-isolated AuAg-nanocrystal | Self-assembly | Multiphase analysis | Multimodal cellular Raman imaging Surface-enhanced Raman spectroscopy (SERS)-based bioanalytical technique involves the interaction of SERS-active substrate with complex environment, which has aroused intensive research interests. Compared to the commonly used Au SERS substrates, Ag nanocrystals have larger optical absorption cross section and acceptable price, but they possess poor oxidation resistance and potential biotoxicity, and the occurrence of unnecessary chemical reactions is inevitable due to the direct contact with probe molecules. Herein, we report a graphene-isolated AuAg nanocrystal (GIAAN) with the SERS-active AuAg core confined in a nanospace of few-layer graphene shell, which possesses unique Raman peaks, high SERS activity, excellent stability, superior fluorescence quenching performance and good biocompatibility. Based on the limited solubility of GIAAN in water and organic solvents, it is able to spontaneously generate interfacial self-assembled GIAAN (ISA-GIAAN) film at immiscible two-phase interfaces without any inducer, and multiphase Raman analysis of both water-and lipid-soluble drug model molecules is further achieved. Moreover, the GIAAN is further non-covalently functionalized with polyoxyethylenestearyl ether (C 18 -PEG) to acquire GIAAN@PEG with good water-solubility for SERS quantitative analysis in homogeneous system and multimodal Raman imaging of MCF-7 cells. We expect the versatile GIAAN holds great potential to monitor drug metabolism and guide intended drug delivery in clinic trials.

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Section: Resultsmentioning

confidence: 99%

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging^†

Zhu

Cai

et al. 2021

Chin. J. Chem.

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“…Therefore, numerous types of novel SERS substrates were developed, such as silver or gold coupled with transparent flexible support, 4,5 paper-based SERS substrates, 6,7 and carbon materials wrapped noble metal composites. 8–10 Moreover, mesoporous Au nanoparticles 11 and flowerlike Au nanostructures 12 were also employed. However, great challenges still exist in the complex synthetic process.…”

Section: Introductionmentioning

confidence: 99%

Finite-difference time-domain to screen Au NPs as SERS active substrate for the sensitive determination of prohibited drugs in fish via solvent cleaning

Han

et al. 2022

Anal. Methods

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“…The use of toxic and expensive extraction solvents such as chlorinated or aromatic solvents is considered as the main problem of DLLME. To solve this problem and advance the goals of green chemistry, novel solvents known as ionic liquids and deep eutectic solvents (DESs) were used [26–34].…”

Section: Introductionmentioning

confidence: 99%

Combination of temperature‐assisted ternary phase homogenous liquid–liquid extraction with deep eutectic solvent–based dispersive liquid–liquid microextraction for the extraction of phytosterols from cow milk and cream samples

Ebadnezhad

Mogaddam

Mohebbi

et al. 2021

J of Separation Science

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A three‐phase homogenous liquid–liquid extraction method followed by deep eutectic solvent–based dispersive liquid–liquid microextraction has been used for the extraction and preconcentration of some phytosterols from cow milk and cream samples. In this method, cow milk or melted cream was transferred into a glass test tube and a mixture of sodium hydroxide solution (as fatty acids saponification agent) and acetonitrile (as extraction/dispersive solvent) was added to the solution. The mixture was shaken manually and placed in a water bath. After dissolving sodium chloride and centrifugation, the obtained supernatant phase (acetonitrile) was removed and mixed with ethyl methyl ammonium chloride: phenyl acetic acid deep eutectic solvent at microliter level. Under optimum conditions, low limits of detection (1.6–4.1 μg/L) and quantification (5.3–13.1 μg/L), high enrichment factors (138–207), and extraction recoveries (55–83%), and good precision (relative standard deviations ≤ 6.8%) can be obtained. The method was done on different milk and cream samples and the results showed that total phytosterols level in all samples were in the permitted level established by the National Standard Organization Guidelines, except for three cream samples.

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Fabrication of Au nanoparticles embedded holey g-C3N4 as SERS substrates for sensitive and reliable detection

Cited by 69 publications

References 48 publications

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging^†

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging^†

Finite-difference time-domain to screen Au NPs as SERS active substrate for the sensitive determination of prohibited drugs in fish via solvent cleaning

Combination of temperature‐assisted ternary phase homogenous liquid–liquid extraction with deep eutectic solvent–based dispersive liquid–liquid microextraction for the extraction of phytosterols from cow milk and cream samples

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Fabrication of Au nanoparticles embedded holey g-C3N4 as SERS substrates for sensitive and reliable detection

Cited by 69 publications

References 48 publications

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging†

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging†

Finite-difference time-domain to screen Au NPs as SERS active substrate for the sensitive determination of prohibited drugs in fish via solvent cleaning

Combination of temperature‐assisted ternary phase homogenous liquid–liquid extraction with deep eutectic solvent–based dispersive liquid–liquid microextraction for the extraction of phytosterols from cow milk and cream samples

Contact Info

Product

Resources

About

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging^†

Versatile Graphene‐Isolated AuAg‐Nanocrystal for Multiphase Analysis and Multimodal Cellular Raman Imaging^†