Colloidal Synthesis of Crystalline Aluminum Nanoparticles for UV Plasmonics

Castilla, Marion; Schuermans, Silvere; Gérard, Davy; Martin, Jérôme; Maurer, Thomas; Hananel, Uri; Markovich, Gil; Plain, Jérôme; Proust, Julien

doi:10.1021/acsphotonics.1c01615

Cited by 7 publications

(5 citation statements)

References 35 publications

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“…The uniqueness of the Au@Ag core–shell NRs is in their broadband spectra extending from the UV to the NIR. These NCs possess the unique property to create intensive peaks in the UV at about 350 nm, which are the slab-like plasmons in the Ag shell. , When we compare with the other examples of plasmon peaks within UV plasmonics, like in the Al NCs − for instance, we see that the UV plasmons in the high-quality and monodisperse Au@Ag systems are sharper and also appear further in the UV.…”

Section: Discussionmentioning

confidence: 82%

Hot Electrons and Electromagnetic Effects in the Broadband Au, Ag, and Ag–Au Nanocrystals: The UV, visible, and NIR Plasmons

Muravitskaya,

Movsesyan,

Ávalos-Ovando

et al. 2023

ACS Photonics

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Energetic and optical properties of plasmonic nanocrystals strongly depend on their sizes, shapes, and composition. Whereas the use of plasmonic nanoparticles in biotesting has become routine, applications of plasmonics in energy are still early in development. Here, we investigate hot-electron (HE) generation and related electromagnetic effects in both mono-and bimetallic nanorods (NRs) and focus on a promising type of bimetallic nanocrystal−core− shell Au−Ag nanorods. The spectra of the NRs are broadband, highly tunable with their geometry, and exhibit few plasmon resonances. In this work, we provide a new quantum formalism describing the HE generation in bimetallic nanostructures. Interestingly, we observe that the HE generation rate at the UV plasmon resonance of Au−Ag NRs appears to be very high. These HEs are highly energetic and suitable for carbon-fuel reactions. Simultaneously, the HE generation at the longitudinal plasmon (L-plasmon) peaks, which can be tuned from the yellow to near-IR, depends on the near-field and electromagnetic Mie effects, limiting the HE efficiencies for long and large NRs. These properties of the L-plasmon relate to all kinds of NRs (Au, Ag, and Au−Ag). We also consider the generation of the interband d-holes in Au and Ag, since the involvement of the d-band is crucial for the energetic properties of UV plasmons. The proposed formalism is a significant development for the description of bimetallic (or trimetallic, or more complex) nanostructures, and paving the way for the efficient application of the photophysical mechanisms based on the plasmonic HEs and hot holes in sensing, nanotechnology, photocatalysis, and electrophotochemistry.

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Section: Discussionmentioning

confidence: 82%

Hot Electrons and Electromagnetic Effects in the Broadband Au, Ag, and Ag–Au Nanocrystals: The UV, visible, and NIR Plasmons

Muravitskaya,

Movsesyan,

Ávalos-Ovando

et al. 2023

ACS Photonics

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“…Similarly, Proust and colleagues recently explored a method for growing an Al 2 O 3 layer directly on plasmonic Al NPs. This layer serves as a protective shield, improving the stability of the NPs by preventing them from agglomeration …”

Section: Synthesis and Growth Mechanism Of Plasmonic Heterostructuresmentioning

confidence: 99%

“…This layer serves as a protective shield, improving the stability of the NPs by preventing them from agglomeration. 28 Another class of heterostructures includes metal-heterodimers which are hybrid structures consisting of plasmonic metal NPs and heterodimer NCs. Engineering the surface facets of NCs provides a route to tune their reactivities and physicochemical properties that can lead to heterogeneous particle growth with minimal interfacial strains.…”

Section: Synthesis and Growth Mechanism Of Plasmonic Heterostructuresmentioning

confidence: 99%

Evolution of Colloidal Plasmonic Heterostructures from Traditional Semiconductor Nanocrystals to Lead Halide Perovskites: A Review

Chakraborty,

Das,

Dash

et al. 2024

ACS Appl. Nano Mater.

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Plasmonic heterostructures refer to the class of hybrid nanostructures where two or more nanocrystals (NCs) are chemically bonded, at least one of which is plasmonic. The light concentration property of plasmons is used to manipulate the light−matter interaction in the resulting heterostructures for applications in the fields of nanoscience, photonics, catalysis, and biology among many others. With the advancement of colloidal synthesis, plasmonic heterostructures have a versatile landscape of their own in the last couple of decades. In particular, after the discovery of semiconductor plasmonic NCs (In 2 O 3 , CdO, Cu 2−x S, etc.) and halide perovskite NCs (CsPbX 3 , X: Cl, Br, I), the possibility of heterostructures expanded multifold. Nevertheless, challenges remain in successfully synthesizing phase pure structures, optimizing the right geometry and composition for applications, or more fundamentally, observing plasmonic properties despite the formation of heterostructures. In this Review, we briefly review the progress of the colloidal plasmonic heterostructures in terms of synthesis, optical properties, and applications. We discuss these aspects in the traditional noble metal nanoparticle-based compounds, followed by semiconductor plasmonic and halide perovskite heterostructures. We specifically focus on the current challenges faced by the research community in the field of plasmonic halide perovskites and how fundamental design principles can bypass the current limitations.

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“…However, similarly to other highly reductive materials, the wet-chemical synthesis of well-defined anisotropic structures has proven to be a difficult challenge. Several research groups have made significant progress, managing to tune the syntheses of spherical, cubic, bipyramidal, and even rod-shaped particles. − In all cases, the key and unique feature of Al nanocrystal growth is the formation of a 2–3 nm oxide layer surrounding the nanoparticles. − For example, the selective oxidation of different crystallographic facets in growing Al nanocrystals was exploited by Luo et al for the preparation of sub-2 nm Al nanosheets, which remains the only report to date . The authors injected a mixture of oxygen and nitrogen gas in the growth solution to regulate the concentration of oxygen during the reduction of AlCl 3 precursor by LiAlH 4 at 140 °C.…”

Section: Other Crystal Lattices and Compositionsmentioning

confidence: 99%

Plate-Like Colloidal Metal Nanoparticles

et al. 2023

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The pseudo-two-dimensional (2D) morphology of plate-like metal nanoparticles makes them one of the most anisotropic, mechanistically understood, and tunable structures available. Although well-known for their superior plasmonic properties, recent progress in the 2D growth of various other materials has led to an increasingly diverse family of plate-like metal nanoparticles, giving rise to numerous appealing properties and applications. In this review, we summarize recent progress on the solution-phase growth of colloidal plate-like metal nanoparticles, including plasmonic and other metals, with an emphasis on mechanistic insights for different synthetic strategies, the crystallographic habits of different metals, and the use of nanoplates as scaffolds for the synthesis of other derivative structures. We additionally highlight representative self-assembly techniques and provide a brief overview on the attractive properties and unique versatility benefiting from the 2D morphology. Finally, we share our opinions on the existing challenges and future perspectives for plate-like metal nanomaterials.

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Colloidal Synthesis of Crystalline Aluminum Nanoparticles for UV Plasmonics

Cited by 7 publications

References 35 publications

Hot Electrons and Electromagnetic Effects in the Broadband Au, Ag, and Ag–Au Nanocrystals: The UV, visible, and NIR Plasmons

Hot Electrons and Electromagnetic Effects in the Broadband Au, Ag, and Ag–Au Nanocrystals: The UV, visible, and NIR Plasmons

Evolution of Colloidal Plasmonic Heterostructures from Traditional Semiconductor Nanocrystals to Lead Halide Perovskites: A Review

Plate-Like Colloidal Metal Nanoparticles

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