Detection of the conformational changes of <i>Discosoma</i> red fluorescent proteins adhered on silver nanoparticles-based nanocomposites via surface-enhanced Raman scattering

Scarangella, Adriana; Soumbo, Marvine; Mlayah, Adnen; Bonafos, Caroline; Monje, Marie‐Carmen; Roques, Christine; Marcelot, Cécile; Large, Nicolas; Dammak, T.

doi:10.1088/1361-6528/aaff79

Cited by 4 publications

(5 citation statements)

References 94 publications

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“…Second, a sensitization of the BOPP due to the presence of AgNPs may occur, either through the formation of oxidized groups in the AgNPs environment, or through metal enhanced luminescence processes, that involve the LSPR supported by the metallic nanoparticles. This later process, complex indeed, has been recently reported in different nanoscience fields [50], [74], [75], [76]. Another channel for energy transfer from the AgNPs to the BOPP film appears quite efficient.…”

Section: Probing the Energetic Processes With Ac-electroluminescence ...supporting

confidence: 54%

“…For the AgNPs/SiOC:H tailored BOPP sample this additional band can be attributed to SPs emission from the AgNPs in SiOC:H environment. As discussed in Section V.B, the SPs are collective excitations of the electron gas and for metals such as gold or silver their relaxation signatures are in the visible range [48], [50], [59]. SPs, as a component of the EL-spectra from insulating polymers, have been reported for BOPP and polyethylene (PE) films.…”

Section: Probing the Energetic Processes With Ac-electroluminescence ...mentioning

confidence: 98%

“…It is now established that the LSPR depends on the morphology, composition, and local environment of the nano-inclusions [49]. For comparison, the theoretical LSPR of the same large and discrete AgNPs but embedded in a SiO 2 host matrix points to 419 nm (2.96 eV) and the experimental one was found at 456 nm (2.72 eV) [50]. The obtained red shift of the LSPR of the AgNPs here is mainly due to their environment i.e., the BOPP polymer which is in contact with the AgNPs, as well as to deviation in their morphology (shape, eccentricity, etc.)…”

Section: B Evidence Of Agnps Localized Surface Plasmon Resonance In T...mentioning

confidence: 99%

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Tailoring by AgNPs of the Energetics of Charge Carriers in Electrically Insulating Polymers at the Electrode/Dielectric Contact

Villeneuve-Faure

Scarangella

Montanari

et al. 2023

IEEE Open J. Nanotechnol.

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The ever increasing field of application of nanodielectrics in electrical insulations calls for description of the mechanisms underlying the performance of these systems and for identification of the signs exposing their aging under high electric fields. Such approach is of particular interest to electrically insulating polymers because their chemical defects are of deleterious nature for their electrical properties and can largely degrade their performance at high electric fields. Although these defects usually leave spectroscopic signatures in terms of characteristic luminescence peaks, it is nontrivial to assign, in an unambiguous way, the identified peaks to specific chemical groups or defects because of the low intensity of the signal with the main reason being that the insulating polymers are weakly emitting materials under electric field. In this work, we go beyond the conventional electroluminescence technique to record spectroscopic features of insulating polymers. By introducing a single plane of silver nanoparticles (AgNPs) at the near-surface of thin polypropylene films, the electroluminescent signal is strongly enhanced by surface plasmons processes. The presence of AgNPs leads not only to a much higher electroluminescence intensity but also to a strong decrease of the electric field threshold for detection of light emission and to a phase-stabilization of the recorded spectra, thus improving the assignment of the characteristic luminescence peaks. Besides, the performed analyses bring evidence on the capability of AgNPs to trap and eject charges, and on the possibility to adjust the energetics of charge carriers in electrically insulating polymers at the electrode/dielectric contact via AgNPs.

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Section: Probing the Energetic Processes With Ac-electroluminescence ...supporting

confidence: 54%

Section: Probing the Energetic Processes With Ac-electroluminescence ...mentioning

confidence: 98%

Section: B Evidence Of Agnps Localized Surface Plasmon Resonance In T...mentioning

confidence: 99%

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Tailoring by AgNPs of the Energetics of Charge Carriers in Electrically Insulating Polymers at the Electrode/Dielectric Contact

Villeneuve-Faure

Scarangella

Montanari

et al. 2023

IEEE Open J. Nanotechnol.

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“…Second, a sensitization of the PP due to the presence of AgNPs may occur, either through the formation of oxidized groups in the AgNPs environment, or through metal enhanced luminescence processes, that involve the LSPR in presence of metallic nanoparticles. This later process, complex indeed, has been recently reported in different nanoscience fields [18,19].…”

Section: B Enhancement Of the Electroluminescence Intensitymentioning

confidence: 56%

Plasmon induced enhancement of the electroluminescence signal of thin insulating polypropylene films

Montanari¹,

Scarangella²,

Teyssèdre³

2020

2020 IEEE 20th International Conference on Nanotechnology (IEEE-NANO)

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Chemical defects are of deleterious nature for the electrical properties of insulating polymers and can largely degrade their performance. Although these defects usually leave spectroscopic signatures in terms of characteristic luminescence peaks, it is nontrivial to assign, in an unambiguous way, the peaks to specific groups of defects because of the low intensity of the signal. In this work, we go beyond the traditional electroluminescence technique to record spectroscopic features of insulating polymers. By introducing a single plan of silver nanoparticles (AgNPs) at the near-surface of thin polypropylene films, the electroluminescent signal is enhanced by plasmon-related process. The latter leads much higher intensity and phasestabilization of the recorded spectra, thus improving the assignment of characteristic luminescence peaks.

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“…For example, the electrical behavior of metallo-dielectric nanocomposites (conductivity, charging and secondary electron emission) under applied electrical stress or irradiation become easier for modulation (Laurent and Kay, 1989;Canet et al, 1992;Milliere et al, 2014;Makasheva et al, 2016;Rigoudy et al, 2020). Their optical properties (refractive index and extinction (absorption) coefficient, including localized surface plasmon resonance -LSPR) can be tailored (Perrin et al, 1985;Pugliara et al, 2015;Scarangella et al, 2019). For biomedical applications, the release of silver ions (Ag + ) and/or silver nanoparticles (AgNPs) from such nanocomposites can be controlled to define their response (toxicity level, biocide versus biocompatibility effects) in contact with microorganisms (Saulou et al, 2009;Körner et al, 2010;Despax et al, 2011;Körner et al, 2012;Saulou et al, 2012;Drábik et al, 2015;Pugliara et al, 2016;Soumbo et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Layer-by-layer structured nanocomposite deposits from plasma-synthesized organosilicon nanoparticles and organosilicon nanoparticles decorated with Ag nanoparticles by taking advantage of cyclic nanoparticle formation in Ar/HMDSO reactive plasmas

Bérard,

Garofano,

Joblin

et al. 2024

Front. Nanotechnol.

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Rational engineering of thin nanocomposite layers, deposited in reactive plasmas, requires knowledge on the plasma behavior in order to produce multifunctional deposits with tailored properties (structural, optical, electrical, etc.) This work presents an experimental study of nanoparticles synthesized in the plasma gas-phase and their subsequent use as building-blocks to form layer-by-layer nanostructures. The experiment is performed in a plasma process that successfully combines plasma polymerization of an organosilicon molecular precursor (hexamethyldisiloxane, HMDSO) and sputtering of a metallic (silver) target. Pulsed injection of the precursor is found to promote cyclic nanoparticle formation in Ar/HMDSO reactive plasmas. The plasma electron temperature is found to vary in the range 1.6—2.2 eV as derived from time-resolved optical emission spectroscopy of the plasma energetic conditions. This diagnostic method is also shown to provide a reliable tool for online monitoring of the nanoparticle synthesis process. Two types of layer-by-layer structured nanocomposites can be obtained depending on the type of nanoparticles synthesized: (i) organosilicon nanoparticles of size less than 100 nm in all studied plasma conditions for a large quantity of injected HMDSO and (ii) raspberry-like nanoparticles of size less than 150 nm when the quantity of injected HMDSO is reduced. The organosilicon nanoparticle growth follows a polydimethylsiloxane (PDMS)-like oligomerization scheme in which the R2-Si(-O)2 silicon bond tends towards the formation of polymeric structure in a R3-Si(-O)1 silicon chemical environment, containing Si-(CH2)-Si type bridges that are involved in cross-linking. The elemental composition of the raspberry-like nanoparticles is similar to that of the organosilicon nanoparticles, supplemented by the Ag component. The decorating silver nanoparticles are ∼15 nm of size, round in shape and polycrystalline. There is no evidence for silver oxides in the nanostructures. The Si-O-Ag bridges, revealed by infrared spectroscopy, suggest the presence of junction sites between the metallic and the organosilicon parts of the raspberry-like nanoparticles. The silver nanoparticles are found to decorate the organosilicon nanoparticles to form the raspberry-like nanoparticles in the plasma gas-phase, before being deposited. This reveals a very interesting phenomenon of simultaneous growth of the silver- and organosilicon-parts in the plasma without mixing during the nucleation phase.

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Detection of the conformational changes of Discosoma red fluorescent proteins adhered on silver nanoparticles-based nanocomposites via surface-enhanced Raman scattering

Abstract: Detection of the conformational changes of Discosoma red fluorescent proteins adhered on silver nanoparticles-based nanocomposites via surfaceenhanced Raman scattering. (2019) Nanotechnology, 30 (16).

Cited by 4 publications

References 94 publications

Tailoring by AgNPs of the Energetics of Charge Carriers in Electrically Insulating Polymers at the Electrode/Dielectric Contact

Tailoring by AgNPs of the Energetics of Charge Carriers in Electrically Insulating Polymers at the Electrode/Dielectric Contact

Plasmon induced enhancement of the electroluminescence signal of thin insulating polypropylene films

Layer-by-layer structured nanocomposite deposits from plasma-synthesized organosilicon nanoparticles and organosilicon nanoparticles decorated with Ag nanoparticles by taking advantage of cyclic nanoparticle formation in Ar/HMDSO reactive plasmas

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