Structural and Optical Properties of Self-Assembled Chains of Plasmonic Nanocubes

Klinkova, Anna; Thérien-Aubin, Héloı̈se; Ahmed, Aftab; Nykypanchuk, Dmytro; Choueiri, Rachelle M.; Gagnon, Brandon P.; Muntyanu, Anastasiya; Gang, Oleg; Walker, Gilbert C.; Kumacheva, Eugenia

doi:10.1021/nl502746h

Cited by 97 publications

(91 citation statements)

References 33 publications

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“…[ 3 ] In contrast, for those 1D nanogaps composed of two close fl at-sided metals, it is straightforward to generate well-defi ned, high-density hotspots along the entire length. [ 10 ] Thus, 1D nanogaps are robust against local defects or impurities, enabling more reliable and reproducible surface-enhanced Raman spectroscopy (SERS). Further, fabricating a 2D array on a plane will largely increase the throughput and gap density.…”

Section: Doi: 101002/adma201505929mentioning

confidence: 99%

From 1D to 3D: Tunable Sub‐10 nm Gaps in Large Area Devices

Zhou

Zhao

et al. 2016

Advanced Materials

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Tunable sub-10 nm 1D nanogaps are fabricated based on nanoskiving. The electric field in different sized nanogaps is investigated theoretically and experimentally, yielding nonmonotonic dependence and an optimized gap-width (5 nm). 2D nanogap arrays are fabricated to pack denser gaps combining surface patterning techniques. Innovatively, 3D multistory nanogaps are built via a stacking procedure, processing higher integration, and much improved electric field.

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Section: Doi: 101002/adma201505929mentioning

confidence: 99%

From 1D to 3D: Tunable Sub‐10 nm Gaps in Large Area Devices

Zhou

Zhao

et al. 2016

Advanced Materials

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“…Rapidly developing self-assembly fabrication methods allow producing nanostructures with simple and cost-effective techniques [14][15][16][17][18]. One of the main features of self-assembly methods is the randomness and disorder in the fabricated structures.…”

Section: Introductionmentioning

confidence: 99%

Disorder-induced Purcell enhancement in nanoparticle chains

Petrov

2015

Phys. Rev. A

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In this paper we report on numerical study of plasmonic nanoparticle chains with long-range dipole-dipole interaction. We have shown that introduction of positional disorder gives a peak in the density of resonant states (DOS) at the frequency of individual nanoparticle resonance. This peak is referred to Dyson singularity in one-dimensional disordered structures [Dyson F., 1953] and, according to our calculations, governs the spectral properties of local DOS. This provides disorder-induced Purcell enhancement that can found its applications in random lasers and for SERS spectroscopy. We stress that this effect relates not only to plasmonic nanoparticles but to an arbitrary chain of nanoparticles or atoms with resonant polarizabilities.Comment: 9 pages, 9 figures, 41 references, regular pape

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“…27). For patchy nanocubes, the face-to-face and the ‘checkerboard’ assembly via the formation of four bonds between the edges may result in a similar reduction in the surface free energy of the system, whereas for nonpatchy nanocubes, the formation of close-packed structures would be favoured, owing to the maximum screening of unfavourable polymer interactions with a poor solvent 30 .…”

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confidence: 99%

Surface patterning of nanoparticles with polymer patches

Choueiri

Galati

Thérien-Aubin

et al. 2016

Nature

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272

343

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Patterning of colloidal particles with chemically or topographically distinct surface domains (patches) has attracted intense research interest1–3. Surface-patterned particles act as colloidal analogues of atoms and molecules4,5, serve as model systems in studies of phase transitions in liquid systems6, behave as ‘colloidal surfactants’7 and function as templates for the synthesis of hybrid particles8. The generation of micrometre- and submicrometre-sized patchy colloids is now efficient9–11, but surface patterning of inorganic colloidal nanoparticles with dimensions of the order of tens of nanometres is uncommon. Such nanoparticles exhibit size- and shape-dependent optical, electronic and magnetic properties, and their assemblies show new collective properties12. At present, nanoparticle patterning is limited to the generation of two-patch nanoparticles13–15, and nanoparticles with surface ripples16 or a ‘raspberry’ surface morphology17. Here we demonstrate nanoparticle surface patterning, which utilizes thermodynamically driven segregation of polymer ligands from a uniform polymer brush into surface-pinned micelles following a change in solvent quality. Patch formation is reversible but can be permanently preserved using a photocrosslinking step. The methodology offers the ability to control the dimensions of patches, their spatial distribution and the number of patches per nanoparticle, in agreement with a theoretical model. The versatility of the strategy is demonstrated by patterning nanoparticles with different dimensions, shapes and compositions, tethered with various types of polymers and subjected to different external stimuli. These patchy nanocolloids have potential applications in fundamental research, the self-assembly of nanomaterials, diagnostics, sensing and colloidal stabilization.

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Structural and Optical Properties of Self-Assembled Chains of Plasmonic Nanocubes

Cited by 97 publications

References 33 publications

From 1D to 3D: Tunable Sub‐10 nm Gaps in Large Area Devices

From 1D to 3D: Tunable Sub‐10 nm Gaps in Large Area Devices

Disorder-induced Purcell enhancement in nanoparticle chains

Surface patterning of nanoparticles with polymer patches

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