One-step detection of melamine in milk by hollow gold chip based on surface-enhanced Raman scattering

Guo, Zhinan; Cheng, Ziyi; Li, Ran; Chen, Lei; Lv, Haiming; Zhao, Bing; Choo, Jaebum

doi:10.1016/j.talanta.2014.01.043

Cited by 39 publications

(22 citation statements)

References 35 publications

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“…Hollow Au or AuAg nanostructures provide enhanced SERS activity compared to that of solid Ag nanoparticles [178,179,187,188,191,213,214]. Schwartzberg et al [188] compared the SERS activity of 30 nm hollow Au nanoparticles with those of solid Ag nanoparticles and reported a 10-fold increase in the SERS signal consistency and by using these hollow gold nanostructures as pH sensors, they have shown about two-fold increase in resolution and 10-fold increase in precision over the Ag nanoparticlebased SERS probes.…”

Section: Applications Of Hollow Nanostructures and Advantages Vs Solmentioning

confidence: 99%

“…Schwartzberg et al [188] compared the SERS activity of 30 nm hollow Au nanoparticles with those of solid Ag nanoparticles and reported a 10-fold increase in the SERS signal consistency and by using these hollow gold nanostructures as pH sensors, they have shown about two-fold increase in resolution and 10-fold increase in precision over the Ag nanoparticlebased SERS probes. Guo et al [191] applied hollow gold chip based SERS probes for detection of melamine in milk in order to monitor the adulteration of milk by melamine. Hollow gold chip generates much more (about four-fold) intense Raman signal compared to the solid chip revealing its effectiveness even at the low (nm level) concentrations where there is no SERS signal for the case of solid nanoparticles [191].…”

Section: Applications Of Hollow Nanostructures and Advantages Vs Solmentioning

confidence: 99%

“…Guo et al [191] applied hollow gold chip based SERS probes for detection of melamine in milk in order to monitor the adulteration of milk by melamine. Hollow gold chip generates much more (about four-fold) intense Raman signal compared to the solid chip revealing its effectiveness even at the low (nm level) concentrations where there is no SERS signal for the case of solid nanoparticles [191]. Yi et al [179] studied the synthesis of AuAg bimetallic hollow nanospheres and their application in SERS and reported that the hollow nanospheres generate intense Raman signals than those of solid Au seed nanoparticles, SiO 2 @Au core@shell nanoshells, SiO 2 @AuAg bimetallic nanoshells during the detection of 1.0 × 10 −8 m R6G.…”

Section: Applications Of Hollow Nanostructures and Advantages Vs Solmentioning

confidence: 99%

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Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

et al. 2016

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Metallic nanostructures have received great attention due to their ability to generate surface plasmon resonances, which are collective oscillations of conduction electrons of a material excited by an electromagnetic wave. Plasmonic metal nanostructures are able to localize and manipulate the light at the nanoscale and, therefore, are attractive building blocks for various emerging applications. In particular, hollow nanostructures are promising plasmonic materials as cavities are known to have better plasmonic properties than their solid counterparts thanks to the plasmon hybridization mechanism. The hybridization of the plasmons results in the enhancement of the plasmon fields along with more homogeneous distribution as well as the reduction of localized surface plasmon resonance (LSPR) quenching due to absorption. In this review, we summarize the efforts on the synthesis of hollow metal nanostructures with an emphasis on the galvanic replacement reaction. In the second part of this review, we discuss the advancements on the characterization of plasmonic properties of hollow nanostructures, covering the single nanoparticle experiments, nanoscale characterization via electron energy-loss spectroscopy and modeling and simulation studies. Examples of the applications, i.e. sensing, surface enhanced Raman spectroscopy, photothermal ablation therapy of cancer, drug delivery or catalysis among others, where hollow nanostructures perform better than their solid counterparts, are also evaluated.

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Section: Applications Of Hollow Nanostructures and Advantages Vs Solmentioning

confidence: 99%

Section: Applications Of Hollow Nanostructures and Advantages Vs Solmentioning

confidence: 99%

Section: Applications Of Hollow Nanostructures and Advantages Vs Solmentioning

confidence: 99%

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Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

et al. 2016

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“…Adulterants can be detected using SERS [180] in wheat gluten, chicken feed, cakes, and noodles [181]. Melamine can be found in liquid milk [182,183], milk powder [184], and infant formula [185] at very low levels.…”

Section: Sers Of Small Moleculesmentioning

confidence: 99%

Fundamentals and applications of SERS-based bioanalytical sensing

et al. 2017

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Abstract:Plasmonics is an emerging field that examines the interaction between light and metallic nanostructures at the metal-dielectric interface. Surface-enhanced Raman scattering (SERS) is a powerful analytical technique that uses plasmonics to obtain detailed chemical information of molecules or molecular assemblies adsorbed or attached to nanostructured metallic surfaces. For bioanalytical applications, these surfaces are engineered to optimize for high enhancement factors and molecular specificity. In this review we focus on the fabrication of SERS substrates and their use for bioanalytical applications. We review the fundamental mechanisms of SERS and parameters governing SERS enhancement. We also discuss developments in the field of novel SERS substrates. This includes the use of different materials, sizes, shapes, and architectures to achieve high sensitivity and specificity as well as tunability or flexibility. Different fundamental approaches are discussed, such as label-free and functional assays. In addition, we highlight recent relevant advances for bioanalytical SERS applied to small molecules, proteins, DNA, and biologically relevant nanoparticles. Subsequently, we discuss the importance of data analysis and signal detection schemes to achieve smaller instruments with low cost for SERS-based point-of-care technology developments. Finally, we review the main advantages and challenges of SERS-based biosensing and provide a brief outlook.

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“…[22] However, the vibrational spectrum of TDF has not been investigated. After it was discovered, [23] surface-enhanced Raman scattering (SERS) was explored [24][25][26][27][28] as a platform for the determination of trace substances [29,30] and even single-molecule detection. [31,32] Hydrogen bonds are weak interactions between hydrogen bond donors and acceptors and important for molecular recognization.…”

Section: Introductionmentioning

confidence: 99%

Multiple weak interaction‐assisted SERS detection platform for triadimefon

Shen

et al. 2014

J Raman Spectroscopy

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In this paper, a surface enhanced Raman spectra (SERS) detection platform for the widely used pesticide of triadimefon (TDF) is described. TDF is difficult to connect to the gold/silver SERS substrate, but the optical properties of the probe molecule 4-mercaptobenzoic acid (4-MBA), including the peak intensity and the peak position, are easily altered by the multiple weak interaction-assisted SERS detection platform. The limit of detection (LOD) of this method is 1.0 × 10 -9 M, and the linear range is from 1.0 × 10 -6 M to 1.0 × 10 -9 M. The linear region is from 1.0 × 10 -6 M to 1.0 × 10 -9 M, described by the equation y = 884.01x + 2.24 with a correlation coefficient (R 2 ) of 0.9990. Interference of foreign metal ions with higher concentrations than common mineral water is too weak to the determination. Furthermore, physical insights into the phenomena and the detection mechanism were obtained and investigated theoretically. The preferential conformation of the complex and reduced density gradient (RDG) calculation results indicated that the interactions between TDF and 4-MBA consisted of multiple weak interactions through two hydrogen bonds and one van der Waals interaction. The intermolecular interaction was negative for the charge transfer from the SERS substrate to the probe molecule; thus, the peak intensity decreased. TDF interacts directly with the carboxyl of the probe molecule and consequently has an effect on the ring vibrations.

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One-step detection of melamine in milk by hollow gold chip based on surface-enhanced Raman scattering

Cited by 39 publications

References 35 publications

Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

Fundamentals and applications of SERS-based bioanalytical sensing

Multiple weak interaction‐assisted SERS detection platform for triadimefon

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