Adsorption and Detection of Sport Doping Drugs on Metallic Plasmonic Nanoparticles of Different Morphology

Izquierdo-Lorenzo, Irene; Alda, Irene; Sánchez-Cortés, Santiago; Garcia-Ramos, J.V.

doi:10.1021/la300194v

Cited by 44 publications

(43 citation statements)

References 45 publications

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“…4(a)). According to Izquierdo-Lorenzo et al, [52] AgNPs reduced by hydroxylamine are spherical, with a diameter around 45 nm and plasmon resonance maximum at 400 nm ( Fig. 1(a)) and have total surface available around 13.6 ± 2.6 cm 2 ml À1 .…”

Section: Quantitative Analysesmentioning

confidence: 92%

“…In addition, the interaction is supported by the appearance of band at 232 cm À1 (not shown here) attributed to Ag-N stretch. [32,52] In fact, the geometry with MBC stands up on Ag surface interacting by nitrogen atom presents a minimal of energy supported by theoretical calculations of the Ag-MBC complex. Bonora et al [6] show that molecules such as atrazine, prometryn, and simetryn interact with Ag surface by nitrogen atom.…”

Section: Uv-vismentioning

confidence: 94%

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Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Furini¹,

Sánchez-Cortés

López‐Tocón

et al. 2015

J Raman Spectroscopy

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Carbendazim (MBC) is a fungicide widely used in agriculture, and there are serious concerns regarding the health risks that could be caused by this fungicide. Here, we explore its ultrasensitive detection by surface-enhanced Raman scattering (SERS). First, to obtain maximum SERS signal, the adsorption of the target molecule onto metallic surface is essential. Therefore, we study the adsorption of the MBC onto the nanoparticle surface by SERS under different experimental conditions, such as different synthesis methods of nanoparticle, variable excitation wavelength, and fungicide concentration with the aim to detect MBC at low concentrations. Experiments are carried out with three kinds of colloidal nanoparticles: Ag and Au reduced by citrate and Ag reduced by hydroxylamine. However, mainly Ag colloids are highly efficient in the SERS detection of MBC. In addition, theoretical calculations of MBC Raman spectrum and that of the surface complex are used to help with the understanding the mechanisms responsible for the interaction between MBC and Ag. Ultraviolet-visible absorption spectroscopy showed displacement to the red of the plasmon resonance of Ag colloid in the presence of MBC.

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Section: Quantitative Analysesmentioning

confidence: 92%

Section: Uv-vismentioning

confidence: 94%

Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Furini¹,

Sánchez-Cortés

López‐Tocón

et al. 2015

J Raman Spectroscopy

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“…The calculated total available surface in AgNPs obtained by reduction with hydroxylamine is 13.6 cm 2 /mL, as reported by us elsewhere. 49 Assuming a perpendicular orientation of PDI and an average molecular area of 15 Å 2 , the molar concentration at which a saturation of the total available surface occurs is 15 μM. On the other hand, we can assume that at low concentration the SERS signal is mainly produced from the molecules placed in junctions.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

Plasmonic Effects of Phenylenediisocyanides Linked at Interparticle Junctions of Metal Nanoparticles

et al. 2014

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Surface-enhanced Raman scattering (SERS) spectroscopy was employed in the present work to elucidate the adsorption of two diisocyanide molecules: 1,4-phenylenediisocyanide (PDI) and 1,4″-terphenylenediisocyanide (TPDI) on nanogaps of Ag and Au nanoparticles (NPs). The main goal of this work was the study of the adsorption of these molecules and more specifically the coordination mechanism and the orientation of these molecules on the metal surface as well as the study of the effect of the above adsorbates on the aggregation and formation of interparticle junctions. To get more insight into the above phenomena, we have investigated different experimental variables such as the numbers of phenylene rings (monophenylene vs terphenylene), the nature of the metal (Au and Ag), the excitation wavelength (532 and 785 nm), and the surface coverage provided by different adsorbate concentrations. The experiments carried out at these conditions revealed the existence concentration of critical values at 0.1 and 3 μM corresponding to changes in the coordination and a complete surface coverage of interparticle junctions. Finally, we have also deduced the great importance of charge-transfer processes occurring between the metal surface and diisocyanide molecules. This charge transfer exhibits a strong dependence on the surface coverage.

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“…The misdeeds will bring huge profits to farmers and producers but cause serious damage to the health of consumers. Moreover, β ‐agonists as uppers were misused by sportsmen to improve their performances on the stadia . Based on the points in the preceding texts, developing effective detection strategy of CL is highly desired.…”

Section: Introductionmentioning

confidence: 99%

Liquid magnetic competitive immunoassay of clenbuterol based on surface‐enhanced Raman spectroscopy

Wei

Zhang

et al. 2017

J Raman Spectroscopy

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The surface‐enhanced Raman spectroscopy (SERS)‐based immunoassay has attracted considerable interests due to its extremely high sensitivity. However, the involved solid substrate brought significant difficulties in its extensive application. Herein, based on the integration of magnetic nanoparticles and SERS, a facial liquid magnetic competitive immunoassay was developed to detect clenbuterol (CL) with high sensitivity and specificity. The competitive reaction with compatible antibody occurred between target and corresponding antigen attached on nanoparticles. The readout strategy based on the inverse correlation of SERS intensity and concentration was employed to determine the content of target. The SERS intensities were originated from the immunocomplexes in sediment enriched by applying an external magnetic field. The coupling effect between the Au and Fe3O4@Au allowed the increase of SERS intensities for improving the performance of this approach, both for limit of detection (LOD) and sensitivity. The immuno protocol was optimized carefully through screening out the amount ratio of different immunonanoparticles, exchanging the immobilization positions of antibody and coating antigen. It was demonstrated that the application of CL antibody‐mercaptobenzoic acid‐labeled Au and CL coating antigen‐Fe3O4@Au nanoparticles (configuration 1) exhibited higher sensitivity than that of CL coating antigen‐mercaptobenzoic acid‐labeled Au and CL antibody‐Fe3O4@Au nanoparticles (configuration 2). It was determined that the LOD and half maximal inhibitory concentration (IC50) were about 0.22 and 246.31 fg ml−1 for CL target of configuration 1, respectively. It was better notably than the previous reports. Moreover, incompatible target, β‐agonist salbutamol (SAL), was also introduced to investigate the effect on CL competitive immunoassay. It revealed that the competitive immunoassay with CL antibody was negligible, indicating the high specificity of the present immunoassay. The SERS‐based liquid magnetic sensor is expected to be developed as a promising technique for the detection of micromolecules and to provide a potential application in coupling with other techniques. Copyright © 2017 John Wiley & Sons, Ltd.

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Adsorption and Detection of Sport Doping Drugs on Metallic Plasmonic Nanoparticles of Different Morphology

Cited by 44 publications

References 45 publications

Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Detection and quantitative analysis of carbendazim herbicide on Ag nanoparticles via surface‐enhanced Raman scattering

Plasmonic Effects of Phenylenediisocyanides Linked at Interparticle Junctions of Metal Nanoparticles

Liquid magnetic competitive immunoassay of clenbuterol based on surface‐enhanced Raman spectroscopy

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