Bimetallic core shelled nanoparticles (Au@AgNPs) for rapid detection of thiram and dicyandiamide contaminants in liquid milk using SERS

Hussain, Abid; Sun, Da‐Wen; Pu, Hongbin

doi:10.1016/j.foodchem.2020.126429

Cited by 142 publications

(46 citation statements)

References 65 publications

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“…Thus, for this parameter couple, the enhancement of the SERS signal can be remarkably improved due to the fact that this excitation wavelength is nearer one plasmonic resonance for the thickest gold layer (see [ 42 ] for more details). From the Figure 2 a,b, two Raman peaks of thiram molecules [ 45 , 46 , 47 ] are well-distinguished: the one at 1145 cm

is attributed to the mode of C–N stretching (called:

(CN)) and the mode of

rocking, and the one at 1378 cm

corresponds to the mode of C–N stretching (called:

(CN)) and the mode of symmetric

deformation (called:

). We have chosen the vibration mode at 1378 cm

for its strongest SERS intensity for assessing the capacity of Au/ZnO nano-urchins to be sensitive.…”

Section: Resultsmentioning

confidence: 99%

Assembled Au/ZnO Nano-Urchins for SERS Sensing of the Pesticide Thiram

2021

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In this paper, we are relating a significant improvement of the SERS effect achieved with assembled Au/ZnO nano-urchins. This improvement is realized thanks to an excellent capacity of adsorption (denoted K) for thiram molecules on these plasmonic nano-urchins, which is a key point to be taken into account for obtaining a SERS spectrum. Moreover, this outlook may be employed for different types of plasmonic substrates and for a wide number of molecules. We studied the capacity of the assembled Au/ZnO nano-urchins to be sensitive to the pesticide thiram, which adsorbs well on metals via the metal–sulfur bond. For the thiram detection, we found a limit concentration of 10 pM, a value of this capacity of adsorption (K) of 9.5 × 106 M−1 and a factor of analytical enhancement equal to 1.9 × 108.

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is attributed to the mode of C–N stretching (called:

(CN)) and the mode of

rocking, and the one at 1378 cm

corresponds to the mode of C–N stretching (called:

(CN)) and the mode of symmetric

deformation (called:

). We have chosen the vibration mode at 1378 cm

for its strongest SERS intensity for assessing the capacity of Au/ZnO nano-urchins to be sensitive.…”

Section: Resultsmentioning

confidence: 99%

Assembled Au/ZnO Nano-Urchins for SERS Sensing of the Pesticide Thiram

2021

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“…However, Raman scattering is a weak phenomenon, as only one photon out of one million photons follows the process [68] . Therefore, to enhance the weak Raman signals (in normal RS) researchers employed nanoparticles (NPs) near samples to enhance the peak intensities and the technique is called SERS [69] . By employing substrates, chemical and physical mechanisms can occur to boost the Raman signals.…”

Section: Non-invasive Techniques For the Measurement Of Qurmentioning

confidence: 99%

“…Both RS and SERS have been extensively applied for different research areas in recent years [69] . The techniques are also suitable for the non-interruptive assessment of phytochemicals in agriculture items.…”

Section: Non-invasive Techniques For the Measurement Of Qurmentioning

confidence: 99%

Novel extraction, rapid assessment and bioavailability improvement of quercetin: A review

Manzoor

Hussain

Sameen

et al. 2021

Ultrasonics Sonochemistry

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“…LODs of 0.21 and 14.88 ppm for thiram and dicyandiamide (DCD) were obtained in milk, respectively. The detection limits of molecules of interest with these plasmonic Au/Ag nanoparticles can be thus determined in a short time (34 min) by using the fabrication approach proposed in this paper [ 78 ]. Tian et al showed the easy synthesis of Au/Ag nanoparticles rich in silver by using the combination of galvanic replacement process and co-reduction of silver atoms.…”

Section: Novelties On Plasmonic and Non-plasmonic Nanomaterials Fomentioning

confidence: 99%

Latest Novelties on Plasmonic and Non-Plasmonic Nanomaterials for SERS Sensing

Barbillon

2020

Nanomaterials

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An explosion in the production of substrates for surface enhanced Raman scattering (SERS) has occurred using novel designs of plasmonic nanostructures (e.g., nanoparticle self-assembly), new plasmonic materials such as bimetallic nanomaterials (e.g., Au/Ag) and hybrid nanomaterials (e.g., metal/semiconductor), and new non-plasmonic nanomaterials. The novel plasmonic nanomaterials can enable a better charge transfer or a better confinement of the electric field inducing a SERS enhancement by adjusting, for instance, the size, shape, spatial organization, nanoparticle self-assembly, and nature of nanomaterials. The new non-plasmonic nanomaterials can favor a better charge transfer caused by atom defects, thus inducing a SERS enhancement. In last two years (2019–2020), great insights in the fields of design of plasmonic nanosystems based on the nanoparticle self-assembly and new plasmonic and non-plasmonic nanomaterials were realized. This mini-review is focused on the nanoparticle self-assembly, bimetallic nanoparticles, nanomaterials based on metal-zinc oxide, and other nanomaterials based on metal oxides and metal oxide-metal for SERS sensing.

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Bimetallic core shelled nanoparticles (Au@AgNPs) for rapid detection of thiram and dicyandiamide contaminants in liquid milk using SERS

Cited by 142 publications

References 65 publications

Assembled Au/ZnO Nano-Urchins for SERS Sensing of the Pesticide Thiram

Assembled Au/ZnO Nano-Urchins for SERS Sensing of the Pesticide Thiram

Novel extraction, rapid assessment and bioavailability improvement of quercetin: A review

Latest Novelties on Plasmonic and Non-Plasmonic Nanomaterials for SERS Sensing

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