Colloidal Nanodisk Shaped Plexcitonic Nanoparticles with Large Rabi Splitting Energies

Balcı, Fadime Mert; Sarisozen, Sema; Polat, Nahit; Balci, Sinan

doi:10.1021/acs.jpcc.9b08834

Cited by 27 publications

(36 citation statements)

References 40 publications

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“…About half of the molecules selected are known to form H- or J-aggregates (Table S1). Indeed, the high transition dipole moments and the narrow bandwidths typical of the J-aggregate absorption bands make them particularly suited for the formation of plexcitons, as proven by the vast wealth of examples available in the literature (see, for instance, refs , , , , and − ). Instead, the formation of plexcitons with molecular excitations coming from organic molecules in the monomeric form is seldom observed with nanoparticles dispersed in solution. ,,− On the contrary, to the best of our knowledge, there is no report of formation of plexcitons with colloidal NPs dispersed in solution and H-aggregates.…”

Section: Resultsmentioning

confidence: 99%

Plexcitonic Nanohybrids Based on Gold Nanourchins: The Role of the Capping Layer

2021

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Plexcitonic nanohybrids are plasmonic–excitonic novel materials whose peculiar properties are attracting considerable attention in photonics, solar cells, and sensing. These materials can be synthesized and characterized easily by assembling organic or inorganic dyes on plasmonic nanoparticles as support. However, the main factors controlling the assembly process and the occurrence of the plexcitonic coupling are still unclear. To fill this gap, in this work, we studied the plexciton coupling of 12 different dyes with a series of gold nanourchins with various coatings and sizes. Among 24 combinations tested, we observed the formation of plexcitonic hybrids only in five cases. Most of them had cyanine J-aggregates as excitonic counterparts. Stronger plexcitonic couplings were obtained when nanourchins were coated with an exchangeable citrate capping layer rather than a strong ionic thiols capping layer. We propose that the presence of a strongly bound capping layer, as in this latter case, reduces the effective volume available to the dyes.

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Section: Resultsmentioning

confidence: 99%

Plexcitonic Nanohybrids Based on Gold Nanourchins: The Role of the Capping Layer

2021

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“…This evidence can also be the cause of a peak splitting in the fluorescence spectrum. The presence of this peak splitting could be due to Rabi splitting phenomena, which were until now observed for metallic NPs (i.e., Au or Ag) and, only partially, for some semiconductors [ 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 ]. In our case, the splitting was observed only for CeO 2 _OC_150 samples and could be related to the presence of oxygen vacancies on the nanoparticles surface (intraparticle voids) and/or to the formation of cluster (interparticle voids), that are indeed observed by means of both TEM and DLS.…”

Section: Discussionmentioning

confidence: 96%

Towards the Development of Antioxidant Cerium Oxide Nanoparticles for Biomedical Applications: Controlling the Properties by Tuning Synthesis Conditions

et al. 2021

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In this work CeO2 nanoparticles (CeO2-NPs) were synthesized through the thermal decomposition of Ce(NO3)3·6H2O, using as capping agents either octylamine or oleylamine, to evaluate the effect of alkyl chain length, an issue at 150 °C, in the case of octylamine and at 150 and 250 °C, in the case of oleylamine, to evaluate the effect of the temperature on NPs properties. All the nanoparticles were extensively characterized by a multidisciplinary approach, such as wide-angle X-ray diffraction, transmission electron microscopy, dynamic light scattering, UV-Vis, fluorescence, Raman and FTIR spectroscopies. The analysis of the experimental data shows that the capping agent nature and the synthesis temperature affect nanoparticle properties including size, morphology, aggregation and Ce3+/Ce4+ ratio. Such issues have not been discussed yet, at the best of our knowledge, in the literature. Notably, CeO2-NPs synthesized in the presence of oleylamine at 250 °C showed no tendency to aggregation and we made them water-soluble through a further coating with sodium oleate. The obtained nanoparticles show a less tendency to clustering forming stable aggregates (ranging between 14 and 22 nm) of few NPs. These were tested for biocompatibility and ROS inhibiting activity, demonstrating a remarkable antioxidant activity, against oxidative stress.

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“…(A) Comparison of different cavity mode (microcavity, resonator, photonic cavity, and micropillars) shows that the plasmonic cavity can achieve strong coupling at 300 K due to its ultrasmall mode volume despite a low Q factor. (B) Excitonic materials, namely, QDs, ,− organic molecules (0D), − SWCNTs, − perovskites (1D), − J-aggregates, − , 2D HOIP, − 2D TMDC monolayers, − and 3D TMDC multilayers ,,− studied in cavity mode. Rabi splitting (ℏΩ) to transition dipole moment (μ) as a figure of merit (ℏΩ/μ) is compared for these excitonic materials.…”

Section: Strong Coupling Of Excitonic Materials In a Cavitymentioning

confidence: 99%

Exciton–Photonics: From Fundamental Science to Applications

Anantharaman

Jariwala

2021

ACS Nano

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Semiconductors in all dimensionalities ranging from 0D quantum dots and molecules to 3D bulk crystals support bound electron-hole pair quasiparticles termed as excitons. Over the past two decades, the emergence of a variety of low-dimensional semiconductors that support excitons combined with advances in nano-optics and photonics has burgeoned a new area of research that focuses on engineering, imaging, and modulating coupling between excitons and photons, resulting in the formation of hybrid-quasiparticles termed exciton-polaritons. This new area has the potential to bring about a paradigm shift in quantum optics, as well as classical optoelectronic devices. Here, we present a review on the coupling of light in excitonic semiconductors and investigation of the unique properties of these hybrid quasiparticles via both farfield and near-field imaging and spectroscopy techniques. Special emphasis is laid on recent advances with critical evaluation of the bottlenecks that plague various materials towards practical device implementations including quantum light sources.Our review highlights a growing need for excitonic materials development together with optical engineering and imaging techniques to harness the utility of excitons and their host materials for a variety of applications.

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Colloidal Nanodisk Shaped Plexcitonic Nanoparticles with Large Rabi Splitting Energies

Cited by 27 publications

References 40 publications

Plexcitonic Nanohybrids Based on Gold Nanourchins: The Role of the Capping Layer

Plexcitonic Nanohybrids Based on Gold Nanourchins: The Role of the Capping Layer

Towards the Development of Antioxidant Cerium Oxide Nanoparticles for Biomedical Applications: Controlling the Properties by Tuning Synthesis Conditions

Exciton–Photonics: From Fundamental Science to Applications

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