Plasmonic Metallurgy Enabled by DNA

Ross, Michael B.; Ku, Jessie C.; Lee, Byeongdu; Mirkin, Chad A.; Schatz, George C.

doi:10.1002/adma.201505806

Cited by 31 publications

(37 citation statements)

References 30 publications

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“…In fact, extensive research efforts have been devoted into the investigations of employing bare plasmonic nanostructures (such as nanorod, nanowire, etc.) as basic building blocks to constitute complex and functional systems [28,29,30], triggering out numbers of important optical applications [31,32,33]. Nevertheless, the feasibility for plasmon–exciton strong coupling systems working as building blocks to construct new systems is seldom explored.…”

Section: Introductionmentioning

confidence: 99%

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

et al. 2019

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Various plasmonic nanocavities possessing an extremely small mode volume have been developed and applied successfully in the study of strong light-matter coupling. Driven by the desire of constructing quantum networks and other functional quantum devices, a growing trend of strong coupling research is to explore the possibility of fabricating simple strong coupling nanosystems as the building blocks to construct complex systems or devices. Herein, we investigate such a nanocube-exciton building block (i.e. AuNC@J-agg), which is fabricated by coating Au nanocubes with excitonic J-aggregate molecules. The extinction spectra of AuNC@J-agg assembly, as well as the dark field scattering spectra of the individual nanocube-exciton, exhibit Rabi splitting of 100–140 meV, which signifies strong plasmon–exciton coupling. We further demonstrate the feasibility of constructing a more complex system of AuNC@J-agg on Au film, which achieves a much stronger coupling, with Rabi splitting of 377 meV. This work provides a practical pathway of building complex systems from building blocks, which are simple strong coupling systems, which lays the foundation for exploring further fundamental studies or inventing novel quantum devices.

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Section: Introductionmentioning

confidence: 99%

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

et al. 2019

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“…2,4 Specifically, self-assembly of metallic nanoparticles and quantum dots have been explored to obtain tunable optical properties. 5,6 A few approaches to achieving ordered structures have been developed including, solvent evaporation, 1 DNA base-pairing, 7 biphasic-separation of water soluble polymers, 8,9 and covalent crosslinking with small molecules. 10 Among these, two of the illustrative approaches for 3D assembly of nanoparticles into superlattices are 1) solvent evaporation induced assembly and 2) DNA-mediated assembly.…”

Section: Introductionmentioning

confidence: 99%

Interpolymer Complexation as a Strategy for Nanoparticle Assembly and Crystallization

et al. 2018

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Controlled self-assembly of nanoparticles into ordered structures is a major step in fabricating nanotechnology based devices. Here, we report on the self-assembly of high quality superlattices of nanoparticles in aqueous suspensions induced via interpolymer complexation. Using small angle X-ray scattering, we demonstrate that the NPs crystallize into superlattices of FCC symmetry, initially driven by hydrogen bonding and subsequently by van der Waals forces between the complexed coronas of hydrogenbonded polymers. We show that the lattice constant and crystal quality can be tuned by polymer concentration, suspension pH and the length of polymer chains. Interpolymer complexation to assemble nanoparticles is scalable, inexpensive, versatile and general.

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“…The subsequent electromagnetic field propagates along the metal–dielectric interface with a much smaller wavelength than the incident light . These characteristics give rise to a strong electric field confinement near the surface, which allows for the manipulation of light at deep sub‐wavelengths, leading to a variety of applications including nanolasers, sensors, bioimaging, surface‐enhanced Raman spectroscopy, color displays, and others …”

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confidence: 99%

“…As a class of emerging photonic materials, noble metal alloys with permittivity and localized surface plasmon resonances not achievable by pure metals have been proposed as alternative candidates for plasmonics because of their tunable dielectric functions, which make it possible to engineer the alloy composition to attain optical properties that will meet desired resonances. In turn, this tunability could be used to improve the performance of devices for a variety of applications, such as perfect absorbers, photovoltaics, hydrogen storage, metallurgy, catalysis, and electrocatalysis .…”

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confidence: 99%

Band Structure Engineering by Alloying for Photonics

Gong

Kaplan

Benson

et al. 2018

Advanced Optical Materials

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at deep sub-wavelengths, [2] leading to a variety of applications including nanolasers, [3] sensors, [4] bioimaging, [5] surfaceenhanced Raman spectroscopy, [6,7] color displays, [8] and others. [9][10][11][12] To improve the performance of today's photonic systems, researchers have extensively investigated the fundamental relation between the wave vector and energy of an SPP wave-named dispersion relation. This quantity describes the propagation of light within a material (i.e., medium), extremely relevant for the abovementioned optical devices. Therefore, understanding the dispersion relation can allow the design of optical materials with superior response, ranging from 2D van der Waals to oxides and metals. Concerning 2D materials, it can uncover the origin of tunable polaritons in hyperbolic metamaterials based on graphene and hexagonal boron nitride (h-BN), which is due to the hybridization of SPP and surface phonon polaritons. [13] As another example, by utilizing the band-edge mode of the dispersion relation in metallic nanocavities, [3] lasing with a 200 times enhancement of the spontaneous emission rate of the dye has been reached. [14] As a class of emerging photonic materials, noble metal alloys with permittivity and localized surface plasmon resonances not achievable by pure metals [9,15,16] have been proposed as alternative candidates for plasmonics [12,[17][18][19][20] because of their tunable dielectric functions, which make it possible to engineer the alloy composition to attain optical properties that will meet desired resonances. In turn, this tunability could be used to Surface plasmon polaritons (SPPs) enable the deep subwavelength confinement of an electromagnetic field, which can be used in optical devices ranging from sensors to nanoscale lasers. However, the limited number of metals that satisfy the required boundary conditions for SPP propagation in a metal/dielectric interface severely limits its occurrence in the visible range of the electromagnetic spectrum. We introduce the strategy of engineering the band structure of metallic materials by alloying. We experimentally and theoretically establish the control of the dispersion relation in Ag-Au alloys by varying the film chemical composition. Through X-ray photoelectron spectroscopy (XPS) measurements and partial density-of-states calculations we deconvolute the d band contribution of the density-of-states from the valence band spectrum, showing that the shift in energy of the d band follows the surface plasmon resonance change of the alloy. Our density functional theory calculations of the alloys band structure predict the same variation of the threshold of the interband transition, which is in very good agreement with our optical and XPS experiments. By elucidating the correlation between the optical behavior and band structure of alloys, we anticipate the fine control of the optical properties of metallic materials beyond pure metals. Band Structure EngineeringThe ORCID identification number(s) for the author(s) of this article can b...

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Plasmonic Metallurgy Enabled by DNA

Cited by 31 publications

References 30 publications

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

Interpolymer Complexation as a Strategy for Nanoparticle Assembly and Crystallization

Band Structure Engineering by Alloying for Photonics

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