Tunable coloration of diamond films by encapsulation of plasmonic Ag nanoparticles

Li, Shuo; Bandy, Jason; Hamers, Robert J.

doi:10.1016/j.diamond.2018.09.003

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…The same peak is also observed in the 3:1 CH 4 /Ar ratio grown sample but not in the 1:1, possibly due to low film thickness and the poor fitting convergence of the latter. This peak is assigned to the LSPR of Ag as [14,40,41], which is more pronounced in comparison with HDLC:Cu as expected.…”

Section: Hdlc With Metal Npssupporting

confidence: 74%

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

et al. 2020

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In this work, the synthesis and characterization of hydrogenated diamond-like carbon (HDLC) nanocomposite thin films with embedded metallic Ag and Cu nanoparticles (NPs) are studied. These nanocomposite films were deposited using a hybrid technique with independent control over the carbon and metal sources. The metallic nanoparticles were directly deposited from the gas phase, avoiding surface diffusion of metal species on the deposition surface. The structural features, surface topography and optical properties of pure and nanocomposite HDLC films are studied and the effect of metal introduction into the carbon matrix is discussed. The interactions between the carbon ion beam and the NPs are considered and it is demonstrated that the nanocomposite HDLC:metal films, especially for Cu NPs, can retain the transparency level of the pure HDLC, by limiting the interactions between metal and carbon during deposition.

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Section: Hdlc With Metal Npssupporting

confidence: 74%

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

et al. 2020

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“…An initial diamond layer of ∼100 nm thickness was first grown by microwave plasma enhanced chemical vapor deposition (PECVD). In the second step, Ag nanoparticles were formed by deposition of a thin continuous Ag film onto the diamond substrate, which was then dewetted by placing the sample into the microwave chamber in the presence of pure hydrogen. , Finally, a second diamond layer with embedded SiV centers was grown using conditions identical to those used in thegrowth of the first diamond layer. The presence of the Si wafer under the sample acted as the source of Si for the SiV centers.…”

Section: Methodsmentioning

confidence: 99%

Ag–Diamond Core–Shell Nanostructures Incorporated with Silicon-Vacancy Centers

Francaviglia

Kohler

et al. 2021

ACS Mater. Au

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Silicon-vacancy (SiV) centers in diamond have attracted attention as highly stable fluorophores for sensing and as possible candidates for quantum information science. While prior studies have shown that the formation of hybrid diamond–metal structures can increase the rates of optical absorption and emission, many practical applications require diamond plasmonic structures that are stable in harsh chemical and thermal environments. Here, we demonstrate that Ag nanospheres, produced both in quasi-random arrays by thermal dewetting and in ordered arrays using electron-beam lithography, can be completely encapsulated with a thin diamond coating containing SiV centers, leading to hybrid core–shell nanostructures exhibiting extraordinary chemical and thermal stability as well as enhanced optical properties. Diamond shells with a thickness on the order of 20–100 nm are sufficient to encapsulate and protect the Ag nanostructures with different sizes ranging from 20 nm to hundreds of nanometers, allowing them to withstand heating to temperatures of 1000 °C and immersion in harsh boiling acid for 24 h. Ultrafast photoluminescence lifetime and super-resolution optical imaging experiments were used to study the SiV properties on and off the core–shell structures, which show that the SiV on core–shell structures have higher brightness and faster decay rate. The stability and optical properties of the hybrid Ag–diamond core–shell structures make them attractive candidates for high-efficiency imaging and quantum-based sensing applications.

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Plasmonic Silver Nanoparticles Facilitate Electron Emission from Diamond upon Sun‐Like Excitation

Bellucci,

Mastellone,

Catone

et al. 2024

ChemPhotoChem

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The development of a stable, non‐toxic material that emits electrons following absorption of visible light may have a major impact on the solar photocatalysis of difficult reactions such as CO$_2$ and N$_2$ reduction, as well as for targeted chemical transformations in general. Diamond is a good candidate, however it is a wide bandgap material requiring deep UV photons (λ < 227 nm) to promote electrons from the valence band into the conduction band. Embedding silver nanoparticles under the diamond surface allows the photoconductivity of the diamond in the spectral region of the surface plasmon resonance to be increased, while also leading to an enhancement of visible light photoemission. Considering the low intensity of the light sources used in this work and the spectral properties of the enhanced photoconductivity and photoemission a mechanism based on plasmonically enhanced photoconductivity which in turn allows surface states emptied by photoemission to be recharged thus leading to enhanced photoemission in the visible range is proposed.

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Tunable coloration of diamond films by encapsulation of plasmonic Ag nanoparticles

Cited by 3 publications

References 46 publications

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

Synthesis and Characterization of Hydrogenated Diamond-Like Carbon (HDLC) Nanocomposite Films with Metal (Ag, Cu) Nanoparticles

Ag–Diamond Core–Shell Nanostructures Incorporated with Silicon-Vacancy Centers

Plasmonic Silver Nanoparticles Facilitate Electron Emission from Diamond upon Sun‐Like Excitation

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