Sensitive and label-free shell isolated Ag NPs@Si architecture based SERS active substrate: FDTD analysis and in-situ cellular DNA detection

Sheena, Thankaraj Salammal; Devaraj, Vasanthan; Lee, Jong-Min; Balaji, Perumalsamy; Gnanasekar, Paulraj; Oh, Jin‐Woo; Akbarsha, Mohammad Abdulkader; Jeganathan, K.

doi:10.1016/j.apsusc.2020.145955

Cited by 19 publications

(9 citation statements)

References 33 publications

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“…Approximately, the fourth power of near field or |E/E 0 | 4 can be compared to the electromagnetic enhancement factor of SERS (for clarity in linear scale graphing, we used |E/E 0 |). By assuming the Raman probe molecules are distributed randomly and uniformly on the NP surface, an averaged electromagnetic enhancement factor can be calculated by averaging the volume integral of |E/E 0 | [1,4,6,8,10,27,29,30,[33][34][35][36][37][38][39]:…”

Section: Problems With Individual Nanostructure(s)mentioning

confidence: 99%

An Accessible Integrated Nanoparticle in a Metallic Hole Structure for Efficient Plasmonic Applications

et al. 2022

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Addressing the severe deterioration of gap mode properties in spherical-shaped nanoparticles (NPs) becomes necessary due to their utilization in a wide range of multi-disciplinary applications. In this work, we report an integrated plasmonic nanostructure based on a spherical-shaped nanoparticle (NP) in a metallic hole as an alternative to a NP-only structure. With the help of three-dimensional (3D) electromagnetic simulations, we reveal that when a NP is positioned on the top of a metallic hole, it can exhibit superior gap-mode-based local-field intensity enhancement. The integrated nanostructure displayed a ~22-times increase in near-field enhancement characteristics, similar to cube- or disk-shaped nanostructure’s plasmonic properties. From an experimental perspective, the NP positioning on top of the metallic hole can be realized more easily, facilitating a simple fabrication meriting our design approach. In addition to the above advantages, a good geometrical tolerance (metallic hole-gap size error of ~20 nm) supported by gap mode characteristics enhances flexibility in fabrication. These combined advantages from an integrated plasmonic nanostructure can resolve spherical-shaped NP disadvantages as an individual nanostructure and enhance its utilization in multi-disciplinary applications.

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Section: Problems With Individual Nanostructure(s)mentioning

confidence: 99%

An Accessible Integrated Nanoparticle in a Metallic Hole Structure for Efficient Plasmonic Applications

et al. 2022

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“…With these techniques, the detection limits of the pesticide thiram vary between 10

M to 10

M. In addition, another technique is also used, which is the surface-enhanced Raman scattering (SERS). This technique consists in the use of plasmonic or hybrid (metal/semiconductor) nanostructures/nanoparticles [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ] in order to improve the SERS signal of biochemical analytes via electric fields of the plasmonic or hybrid nanostructures/nanoparticles [ 20 ]. These plasmonic nanostructures/nanoparticles can be fabricated by chemical synthesis [ 21 , 22 , 23 , 24 ] or lithographic techniques [ 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ].…”

Section: Introductionmentioning

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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“…Another approach for obtaining an excellent SERS activity is to use luminescent-plasmonic material based on neodymium(III)-doped yttrium–aluminium–silicate microspheres with gold nanoparticles [ 45 ]. In addition, hybrid metal/Si nanostructures allowed achieving substantial values of EF (10 7 –10 10 ) [ 46 , 47 , 48 , 49 , 50 , 51 , 52 ]. These hybrid nanostructures based on silicon (semiconductor) have the property of biocompatibility, and a low cost of production.…”

Section: Introductionmentioning

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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Sensitive and label-free shell isolated Ag NPs@Si architecture based SERS active substrate: FDTD analysis and in-situ cellular DNA detection

Cited by 19 publications

References 33 publications

An Accessible Integrated Nanoparticle in a Metallic Hole Structure for Efficient Plasmonic Applications

An Accessible Integrated Nanoparticle in a Metallic Hole Structure for Efficient Plasmonic Applications

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

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

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