Assembly of gold nanoparticles using turnip yellow mosaic virus as an in-solution SERS sensor

Nguyen, Ha Anh; Jupin, Isabelle; Decorse, Philippe; Lau-Truong, Stéphanie; Ammar, Souad; Ha-Duong, Nguyêt-Thanh

doi:10.1039/c9ra08015e

Cited by 9 publications

(18 citation statements)

References 54 publications

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“…3(h). The red-shift and broadening of the plasmon peak in the absorption spectra also has been observed in experiments of plasmonic NP arrangements [10][11][12][13]. The spectrum of Th1, however, supports a broad peak at 2.75 eV with a shoulder at approximately 2.5 eV.…”

Section: B Absorption Spectra and Ctr Valuessupporting

confidence: 54%

“…Exact comparison to existing experiments is also hindered by the generally much larger size of the NPs and interparticle separations in the experimental plasmonic assemblies, such as those mentioned in the introduction, compared to the jellium arrangements studied here. Specifically, none of the articles [5][6][7][8][9][10][11][12][13] report CTPs, which require very small intercluster separations. So far, CTPs have not been observed for cluster systems with similar arrangements and cluster sizes as studied here.…”

Section: Discussionmentioning

confidence: 99%

“…Three-dimensional arrangements of plasmonic NPs can be assembled, for example, by using DNA templates [5,6], manipulation with atomic force microscope [7], tethering or coating the clusters with block copolymers [8][9][10], or using viruses or virus-like particles as templates [11][12][13]. The geometries achieved include among others spherical vesicles [10], tetrahedra [5][6][7][8][9], icosahedra [9,11], and other arrangements with fivefold symmetries [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…One application for these plasmonic assemblies or "plasmonic molecules" is surface-enhanced Raman scattering (SERS). Via the creation of hot spots between the plasmonic NPs, these assemblies were found to enhance the signal compared to single NPs [8,10,12,13]. Pazos-Perez et al fabricated several 2D and 3D geometries of block copolymer-protected Au NPs using evaporation of emulsion droplets [8].…”

Section: Introductionmentioning

confidence: 99%

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Analysis of the plasmonic excitations in assemblies of three-dimensional electron clusters

2020

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In the quest to built novel metamaterials with unique optical properties, three-dimensional assemblies of metal clusters and nanoparticles are gathering significant attention. Organized geometries, such as tetrahedra and icosahedra, can be built, for example, by using DNA strands or virus capsids as templates. Here we use the jellium model and time-dependent density functional theory to study the plasmonic resonances in different arrangements of eight-electron clusters from the electronic perspective. A charge transfer ratio index based on the induced transition densities is used to quantify the charge transfer nature of the excitations at different energies. We vary the size, shape, and intercluster separation, building systems of four-cluster tetrahedra, 12-cluster icosahedra and cuboctahedra, and 20-cluster dodecahedra. All the studied systems are found to have charge transfer plasmon-type excitations at low energies. Analysis of the electron-hole transitions contributing to the transition dipole moment is further used to characterize these excitations, showing that they have significant screening contributions unlike the higher-energy excitations. The understanding gained for the optical response of these simple model systems can help in interpreting the properties of real, complex cluster systems.

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Section: B Absorption Spectra and Ctr Valuessupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of the plasmonic excitations in assemblies of three-dimensional electron clusters

2020

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“…5 Therefore, many studies have focused on designing and developing plasmonic NPs with sharp tips, such as nanostars, 6 nanodendrites, 7 nanotriangles, 8 NPs, such as nanocubes and nanowires, were also promising SERS substrates thanks to their potential of creating nanogaps via self-assembly. 9 These nanogaps could be created using polymer-assisted assembly, 10 DNA origami, 11 protein anchoring, 12 etc. On the other hand, researchers have also paid attention to improving the formation of molecule−metal complexes by modifying the NPs with capping agents allowing the binding of the desired analytes via electrostatic interaction, 13 steric effect, 14 host−guest interaction, 15 biological recognition, 16 etc.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles-Based SERS Platform towards Detecting Chloramphenicol and Amoxicillin: An Experimental Insight into the Role of HOMO–LUMO Energy Levels of the Analyte in the SERS Signal and Charge Transfer Process

et al. 2022

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Great influences of the lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy levels of the analyte and their alignments compared to the Fermi level of the substrate on the charge transfer (CT) process, and consequently, on the surface-enhanced Raman scattering (SERS) phenomenon have been described via theoretical calculations. To provide experimental evidence, in this study, two antibiotics, chloramphenicol (CAP) and amoxicillin (AMX), were investigated as analytes in SERS sensors based on electrochemically synthesized colloidal silver nanoparticles (e-AgNPs) as the substrate. Despite the same experimental condition, similarities in analyte structure, and in the ability of absorbing onto e-AgNPs, the detection of the two antibiotics showed obvious distinction. While CAP was able to be detected using e-AgNP-based SERS sensors at concentrations down to 1.2 × 10 −9 M, there were no characteristic peaks observed in the SERS spectra of AMX even at a high concentration of 10 −3 M. The LUMO and HOMO energy levels of the two analytes were measured using electrochemical cyclic voltammetry. The obtained results showed that the LUMO levels of both analytes were higher than the Fermi level of Ag, and the LUMO level of AMX was higher than that of CAP. The larger gap between the LUMO level of AMX and the Fermi level of Ag might have prevented the metal-to-molecule CT process, which is related to the Raman signal enhancement in both chemical and electromagnetic mechanisms. In contrast, the smaller energy gap in the case of CAP might have allowed the transfer of hot electrons from the Fermi level of the e-AgNPs to the LUMO level of the analyte. Therefore, CAP could experience an SERS effect on the e-AgNPs under the excitation of a 785 nm laser source, while AMX could not. The hypothesis was then confirmed using three other organic compounds, including furazolidone, 4-nitrophenol, and tricyclazole. The results revealed a clear correlation between the LUMO level of the analytes and their SERS signals.

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Ultrasensitive Detection of Methylene Blue Using an Electrochemically Synthesized SERS Sensor Based on Gold and Silver Nanoparticles: Roles of Composition and Purity on Sensing Performance and Reliability

Doan

Nguyen

Quang

et al. 2021

J. Electron. Mater.

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Assembly of gold nanoparticles using turnip yellow mosaic virus as an in-solution SERS sensor

Abstract: 3D-assembly of gold nanoparticles onto turnip yellow mosaic virus.

Cited by 9 publications

References 54 publications

Analysis of the plasmonic excitations in assemblies of three-dimensional electron clusters

Analysis of the plasmonic excitations in assemblies of three-dimensional electron clusters

Silver Nanoparticles-Based SERS Platform towards Detecting Chloramphenicol and Amoxicillin: An Experimental Insight into the Role of HOMO–LUMO Energy Levels of the Analyte in the SERS Signal and Charge Transfer Process

Ultrasensitive Detection of Methylene Blue Using an Electrochemically Synthesized SERS Sensor Based on Gold and Silver Nanoparticles: Roles of Composition and Purity on Sensing Performance and Reliability

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