Dynamics of nanocubes embedding into polymer films investigated via spatially resolved plasmon modes

Bottomley, Adam; Prezgot, Daniel; Coyle, Jason P.; Ianoul, Anatoli

doi:10.1039/c6nr02604d

Cited by 21 publications

(61 citation statements)

References 54 publications

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“…The blue, green, and red bands denote the shift of the multipolar (M), quadrupolar (Q), and dipolar (D) modes, respectively. Reproduced with permission from Ref [37]. in-solution plasmon hybridization is anticipated.…”

Section: List Of Figuresmentioning

confidence: 99%

“…The fine-tuning and understanding of the embedment process of AgNC in polystyrene was recently completed by our group. 37,38,39 Deak et al also utilized polystyrene as a mask for their gold/silica "mushroom" particles, however they casted a mixed solution of PS and nanoparticles (NP) via spin coating. They controlled the degree of particle coverage by optimizing the concentration of polystyrene in their casting solution and the spin speed.…”

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

“…A method was developed to controllably embed AgNCs into PS through monitoring of the plasmonic modes via UV-vis spectroscopy. 37 AgNCs of 60-65nm edge length supported on a PS film will exhibit three distinct extinction peaks. The lowest wavelength the air (Figure 1.10).…”

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

“…The lowest wavelength the air (Figure 1.10). 37,39 Due to this spatial separation of the plasmonic modes, the wavelength shift of each mode will occur at different embedment stages and is shown in Figure 1.11. As the cubes embed, the refractive index of the local environment increases and is observed as a redshifting of the peaks.…”

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

“…In stage 4, the M and D modes do not change and the Q mode continues to red shift until it is obscured by the D mode peak. 37 This Q and D mode overlap represents a near-isotropic environment. 39 It is at this point that nearly all of the particles are submerged and only one corner of each cube is exposed at the surface.…”

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

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Plasmonic Core/Half-Shell Nanoparticles: Exploring Half-Shell Growth for Gold, Titania, Silica and Cuprous Oxide onto Silver Nanocubes

Gale-Mouldey¹

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Core/shell nanoparticles have often been studied due to their attractive optical, electronic, and catalytic properties. By coupling these core/shell features with physical anisotropy of the shell -by selectively capping only a portion of the core -complex nanostructures with unique properties can be formed. This research investigates the synthesis and plasmonic properties of silver nanocube/metal and oxide core/shell nanoparticles with full or partial shells. The shell materials tested were gold, titania, silica, and cuprous oxide. The general method involved growing the shell on a silver nanocube (AgNC) that was partially embedded in a polystyrene thin-film supported by a glass substrate. The amount of shell coverage was dictated by the depth of embedding, and thus nanocube surface exposed and available for reaction. After in-solution shell growth, the particles were removed from the substrate and suspended in solution. The characterization of these particles by UV-vis spectroscopy and transmission electron microscopy confirmed their altered plasmonic properties and their morphology. This partial shell growth technique is ideal for any low temperature, two step core/shell synthesis. The resultant shells had quite distinct morphologies dependant on the shell material chosen. While the gold and titania shell growths are incomplete at this time, silica and cuprous oxide provided positive results. The AgNC/SiO2 core/shell nanoparticles exhibited a complete and conformal coverage of SiO2 due to undergrowth between the AgNC and the polystyrene. This undergrowth arises from mild etching of the silver during the silica growth, creating space for the silica precursor to penetrate between the core and the polymer thin-film. The AgNC/Cu2O core/shell nanoparticles formed had a distinct half-shell morphology with iv either pyramidal or cubic half-shells where the geometry of the shell is dependent upon the order of reagent addition. Furthermore, the cuprous oxide half-shells caused significant modifications to the localized surface plasmon resonance of the AgNC core and resulted in in-solution hybridization of the plasmon modes. The proposed core/half-shell morphology will be particularly advantageous in the formation of dimers for SERS sensing or as individual particles for catalysis. v

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Section: List Of Figuresmentioning

confidence: 99%

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

Section: Embedment Of Silver Nanocubes Into Polymer Thin Filmsmentioning

confidence: 99%

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Plasmonic Core/Half-Shell Nanoparticles: Exploring Half-Shell Growth for Gold, Titania, Silica and Cuprous Oxide onto Silver Nanocubes

Gale-Mouldey¹

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Thermoplasmonic Patterning of Silver Nanocrystal/Polymer Composite Thin Films

Prezgot¹,

Bottomley²,

Jorgenson³

et al. 2021

Adv Materials Inter

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energy harvesting. [8,9] Similarly, the use of metal nanoparticles as thermoplasmonic heat sources has been applied to dynamic optical color patterning. [10,11] This can be achieved by altering the shape, [10] or local environment of the particles in order to alter their LSPR. [12] Plasmonicheat sources can also be utilized in micro/ nanofabrication for mask-less direct-write optical lithography, bypassing the need for the creation of complex masks, or expensive electron or ion-beam lithography to achieve high resolution patterning. Plasmonic heat sources generate highlylocalized heating which can be applied from subdiffraction limited scales to microscale or larger patterning. [13][14][15]

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Plasmonic color generation in silver nanocrystal‐over‐mirror films by thermal embedment into a polymer spacer

2022

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The production of colors by plasmonic nanostructures is an attractive prospect over dyes as they allow ultra‐high resolution, non‐fading colors. Typical techniques for producing plasmonic color patterns such as by electron beam or ion beam lithography are expensive, slow and not well scalable. This work demonstrates a simple, lithography‐free technique for producing plasmonic colors using a silver nanocube (AgNC) based nanoparticle‐over‐mirror (NPoM) system with thermally‐generated colors. AgNC's are deposited over a metal (Au or Ag) film with a polystyrene (PS) dielectric spacer. Upon heating the system past the glass‐transition temperature of PS, the AgNC embed into the polymer, reducing the AgNC/metal film distance. This results in a strong gap‐plasmon that can shift over 200 nm across the visible spectrum during the process. The thermal embedment of AgNC in NPoM systems is tunable across the visible range, producing wide, distinct color palettes depending on the metal film used. This technique can potentially be applied to plasmonic color‐patterning systems to produce high‐resolution microscale or nanoscale patterns over a large area.

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Dynamics of nanocubes embedding into polymer films investigated via spatially resolved plasmon modes

Cited by 21 publications

References 54 publications

Plasmonic Core/Half-Shell Nanoparticles: Exploring Half-Shell Growth for Gold, Titania, Silica and Cuprous Oxide onto Silver Nanocubes

Plasmonic Core/Half-Shell Nanoparticles: Exploring Half-Shell Growth for Gold, Titania, Silica and Cuprous Oxide onto Silver Nanocubes

Thermoplasmonic Patterning of Silver Nanocrystal/Polymer Composite Thin Films

Plasmonic color generation in silver nanocrystal‐over‐mirror films by thermal embedment into a polymer spacer

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