Plasmon–Interband Coupling in Nickel Nanoantennas

Pirzadeh, Zhaleh; Pakizeh, Tavakol; Miljković, Vladimir D.; Langhammer, Christoph; Dmitriev, Alexandre

doi:10.1021/ph4000339

Cited by 54 publications

(54 citation statements)

References 22 publications

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“…2 B and C). This can be attributed to local damping of the Al LSPR through interactions and coupling with Pd interband transitions (31). The plasmon excitation probability is damped where smaller nanoparticle aggregation is found, but is nearly completely eliminated in and around larger (>10 nm) Pd islands.…”

Section: Resultsmentioning

confidence: 99%

Heterometallic antenna−reactor complexes for photocatalysis

Swearer

Zhao

Zhou

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

436

548

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Metallic nanoparticles with strong optically resonant properties behave as nanoscale optical antennas, and have recently shown extraordinary promise as light-driven catalysts. Traditionally, however, heterogeneous catalysis has relied upon weakly light-absorbing metals such as Pd, Pt, Ru, or Rh to lower the activation energy for chemical reactions. Here we show that coupling a plasmonic nanoantenna directly to catalytic nanoparticles enables the light-induced generation of hot carriers within the catalyst nanoparticles, transforming the entire complex into an efficient light-controlled reactive catalyst. In Pd-decorated Al nanocrystals, photocatalytic hydrogen desorption closely follows the antenna-induced local absorption cross-section of the Pd islands, and a supralinear power dependence strongly suggests that hot-carrier-induced desorption occurs at the Pd island surface. When acetylene is present along with hydrogen, the selectivity for photocatalytic ethylene production relative to ethane is strongly enhanced, approaching 40:1. These observations indicate that antenna−reactor complexes may greatly expand possibilities for developing designer photocatalytic substrates.plasmon | photocatalysis | nanoparticle | catalysis | aluminum I ndustrial processes depend extensively on heterogeneous catalysts for chemical production and mitigation of environmental pollutants. These processes often rely on metal nanoparticles dispersed into high surface area support materials to both maximize catalytically active surface area and for the most cost-effective use of expensive catalysts such as Pd, Pt, Ru, or Rh (1, 2). However, catalytic processes utilizing transition metal nanoparticles are often energyintensive, relying on high temperatures and pressures to maximize catalytic activity. A transition from extreme, high-temperature conditions to low-temperature activation of catalytically active transition metal nanoparticles could have widespread impact, substantially reducing the current energy demands of heterogeneous catalysis.Light-driven chemical transformations offer an attractive and ultimately sustainable alternative to traditional high-temperature catalytic reactions. Metallic plasmonic nanostructures are a new paradigm in photoactive heterogeneous catalysts (3-6). Plasmonic nanoparticles uniquely couple electron density with electromagnetic radiation, leading to a collective oscillation of the conduction electrons in resonance with the frequency of incident light, known as a localized surface plasmon resonance (LSPR). These resonances lead to enhanced light absorption in an area much larger than the physical cross-section of the nanoparticle, and such optical antenna effects result in strongly enhanced electromagnetic fields near the nanoparticle surface. An LSPR can be damped through radiative reemission of a photon, or nonradiative Landau damping with the creation of energetic "hot" carriers: electrons above the Fermi energy of the metal and/or holes below the Fermi energy. In this context, "hot" refers to carri...

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Section: Resultsmentioning

confidence: 99%

Heterometallic antenna−reactor complexes for photocatalysis

Swearer

Zhao

Zhou

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

436

548

View full text Add to dashboard Cite

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“…If the oscillator strength of the interband transition is high, i.e. the peak value of 2 is high, as a result 1 will turn strongly negative at photon energies higher than the 2 peak energy, and will take high positive values at photon energies lower than the 2 peak energy [3,[16][17][18][19]. This phenomenon is illustrated in Fig.…”

Section: Concept: Strong Interband Transitions Drive Both Plasmonic Amentioning

confidence: 94%

Interband transitions in semi-metals, semiconductors, and topological insulators: a new driving force for plasmonics and nanophotonics [Invited]

Toudert

Serna

2017

Opt. Mater. Express

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Plasmonic and Mie resonances in subwavelength nanostructures provide an efficient way to manipulate light below the diffraction limit that has fostered the growth of plasmonics and nanophotonics. Plasmonic resonances have been mainly related with the excitation of free charge carriers, initially in metals, and Mie resonances have been identified in Si nanostructures. Remarkably, although much less studied, semi-metals, semiconductors and topological insulators of the p-block enable plasmonic resonances without free charge carriers and Mie resonances with enhanced properties compared with Si. In this review, we explain how interband transitions in these materials show a major role in this duality. We evaluate the plasmonic and Mie performance of nanostructures made of relevant p-block elements and compounds, especially Bi, and discuss their promising potential for applications ranging from switchable plasmonics and nanophotonics to energy conversion, especially photocatalysis.

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“…28,29 For SEIRA it was demonstrated that nanoantennas with nanometer-sized gaps increase the enhancement by 1 order of magnitude in comparison to individual antennas. 30 However, also collective plasmonic excitations originating from periodically arranged nanostructures can provide additional SEIRA enhancement 31,32 if the critical grating periodicity Λ x and Λ y fulfill the following equation:…”

mentioning

confidence: 99%

Fabrication of Square-Centimeter Plasmonic Nanoantenna Arrays by Femtosecond Direct Laser Writing Lithography: Effects of Collective Excitations on SEIRA Enhancement

et al. 2015

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We demonstrate the use of femtosecond direct laser writing lithography for a fast and homogeneous large-area fabrication of plasmonic nanoantennas on a substrate by creating a patterned polymer as an etch mask on a metal layer. Subsequent argon ion beam etching provides plasmonic nanoantennas with feature sizes below the diffraction limit of the laser light. They exhibit tunable high-quality plasmon resonances in the mid-infrared spectral range, which are ideally suited for surface-enhanced infrared absorption (SEIRA). In the present work, we demonstrate reliable, fast, and low-cost fabrication of a wide variety of antenna arrays and examine particularly the influence of plasmonic coupling between neighboring antennas on the SEIRA enhancement effect. Specifically, we measure the enhanced infrared vibrational bands of a 5 nm thick 4,4′-bis(N-carbazolyl)-1,1′-biphenyl layer evaporated on arrays with different longitudinal and transversal spacings between antennas. An optimum SEIRA enhancement per antenna of 4 orders of magnitude is found close to the collective plasmon excitation in the nanoantenna array, rather than at the highest antenna density. Our method establishes a low-cost replacement technique for electron beam lithography. Simple, fast, and straightforward fabrication of optimized SEIRA antenna arrays with cm 2 areas, which can be used in real-world applications such as chemical and biological vibrational sensing, is now possible.

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Plasmon–Interband Coupling in Nickel Nanoantennas

Cited by 54 publications

References 22 publications

Heterometallic antenna−reactor complexes for photocatalysis

Heterometallic antenna−reactor complexes for photocatalysis

Interband transitions in semi-metals, semiconductors, and topological insulators: a new driving force for plasmonics and nanophotonics [Invited]

Fabrication of Square-Centimeter Plasmonic Nanoantenna Arrays by Femtosecond Direct Laser Writing Lithography: Effects of Collective Excitations on SEIRA Enhancement

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