Self-assembly of self-limiting monodisperse supraparticles from polydisperse nanoparticles

Xia, Yunsheng; Nguyen, Trung Dac; Yang, Ming–Hsuan; Lee, Byeongdu; Santos, Aaron; Podsiadlo, Paul; Tang, Zhiyong; Glotzer, Sharon C.; Kotov, Nicholas A.

doi:10.1038/nnano.2012.106

Cited by 103 publications

(159 citation statements)

References 7 publications

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“…First, their size typically falls in the 100−200 nm range, which is convenient for effective coupling with visible light. 47 Second, the assembly process of terminal SPs is simple and versatile. It takes advantage of generic electrostatic and van der Waals attractive forces and can be applied both to metallic and semiconductor nanocolloids.…”

Section: * S Supporting Informationmentioning

confidence: 99%

“…It takes advantage of generic electrostatic and van der Waals attractive forces and can be applied both to metallic and semiconductor nanocolloids. 47 Third, the spatial proximity of the constituent NPs in SPs promotes effective resonance coupling between different electronic levels 3,48−51 offering a versatile platform for plexcitonics 52−55 and quantum plasmonics. Fourth, the shape of self-assembled SPs is not limited to spheres and can potentially result in asymmetric assemblies leading to chiral nanoscale superstructures.…”

Section: * S Supporting Informationmentioning

confidence: 99%

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Self-Organization of Plasmonic and Excitonic Nanoparticles into Resonant Chiral Supraparticle Assemblies

Isaacoff²,

Bahng³

et al. 2014

Nano Lett.

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Chiral nanostructures exhibit strong coupling to the spin angular momentum of incident photons. The integration of metal nanostructures with semiconductor nanoparticles (NPs) to form hybrid plasmon-exciton nanoscale assemblies can potentially lead to plasmon-induced optical activity and unusual chiroptical properties of plasmon-exciton states. Here we investigate such effects in supraparticles (SPs) spontaneously formed from gold nanorods (NRs) and chiral CdTe NPs. The geometry of this new type of self-limited nanoscale superstructures depends on the molar ratio between NRs and NPs. NR dimers surrounded by CdTe NPs were obtained for the ratio NR/NP = 1:15, whereas increasing the NP content to a ratio of NR/NP = 1:180 leads to single NRs in a shell of NPs. The SPs based on NR dimers exhibit strong optical rotatory activity associated in large part with their twisted scissor-like geometry. The preference for a specific nanoscale enantiomer is attributed to the chiral interactions between CdTe NP in the shell. The SPs based on single NRs also yield surprising chiroptical activity at the frequency of the longitudinal mode of NRs. Numerical simulations reveal that the origin of this chiroptical band is the cross talk between the longitudinal and the transverse plasmon modes, which makes both of them coupled with the NP excitonic state. The chiral SP NR-NP assemblies combine the optical properties of excitons and plasmons that are essential for chiral sensing, chiroptical memory, and chiral catalysis.

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Section: * S Supporting Informationmentioning

confidence: 99%

Section: * S Supporting Informationmentioning

confidence: 99%

Self-Organization of Plasmonic and Excitonic Nanoparticles into Resonant Chiral Supraparticle Assemblies

Isaacoff²,

Bahng³

et al. 2014

Nano Lett.

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“…As a first application of this methodology, we attempt to inverse design a pairwise potential that forms a fluid of ''ideal'' amorphous equilibrium clusters of prescribed size. [48][49][50] The role of surface charge renormalization has been studied by others as well. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45] The classic paradigm for forming equilibrium clusters from an isotropic pair potential focuses on models that exhibit a combination of short-range attractive (SA) and longer-range repulsive (LR) contributions, commonly referred to as an SALR model.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium cluster fluids: pair interactions via inverse design

et al. 2015

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Inverse methods of statistical mechanics are becoming productive tools in the design of materials with specific microstructures or properties. While initial studies have focused on solid-state design targets (e.g., assembly of colloidal superlattices), one can alternatively design fluid states with desired morphologies. This work addresses the latter and demonstrates how a simple iterative Boltzmann inversion strategy can be used to determine the isotropic pair potential that reproduces the radial distribution function of a fluid of amorphous clusters with prescribed size. The inverse designed pair potential of this "ideal" cluster fluid, with its broad attractive well and narrow repulsive barrier at larger separations, is qualitatively different from the so-called SALR form most commonly associated with equilibrium cluster formation in colloids, which features short-range attractive (SA) and long-range repulsive (LR) contributions. These differences reflect alternative mechanisms for promoting cluster formation with an isotropic pair potential, and they in turn produce structured fluids with qualitatively different static and dynamic properties. Specifically, equilibrium simulations show that the amorphous clusters resulting from the inverse designed potentials display more uniformity in size and shape, and they also show greater spatial and temporal resolution than those resulting from SALR interactions.

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“…In addition to controlling their shape, also distinct additional functionality can be introduced to the supraparticles by incorporating appropriate colloidal materials to the drying suspensions . This was shown by adding gold nanoparticles to a suspension of polystyrene latex microspheres to modify the optical properties .…”

Section: Introductionmentioning

confidence: 99%

Controlled Formation of Patchy Anisometric Fumed Silica Supraparticles in Droplets on Bent Superhydrophobic Surfaces

Sperling

Spiering

Velev

et al. 2016

Part. Part. Syst. Charact.

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This article presents a study on the formation of anisometric, ellipsoidal supraparticles by evaporation‐induced self‐assembly from multicomponent colloidal dispersion droplets deposited on a superhydrophobic surface. Performing the formation process on bent surface substrates grants precise control on the shape and spatial orientation of the final dried supraparticles. Due to the V‐shaped surfaces providing interfacial blockage, anisotropic evaporation rates occur with respect to the direction of the bending channel. This proportionally leads to inhomogeneous accumulation of fumed silica (FS), used as structure guiding component. Thus, upon the increase of FS‐particle interaction via ionic strength (NaCl), this so‐formed shell provides enough anisotropic stiffness resulting in predictable droplet deformation with the elongation orientation being perpendicular to the bending axis. The anisotropic evaporation rates were monitored and quantified using an established, empiric kinetic model and taking into account surface geometry. Employing this reliable control of elongation direction and using additional Fe3O4@SiO2 core–shell nanoparticles, anisometric magnetic Janus supraparticles with defined patch position were prepared, which are not accessible on flat surfaces. The results can find application in the controlled, easy to scale up, nanofabrication process of patchy anisometric supraparticles.

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Self-assembly of self-limiting monodisperse supraparticles from polydisperse nanoparticles

Cited by 103 publications

References 7 publications

Self-Organization of Plasmonic and Excitonic Nanoparticles into Resonant Chiral Supraparticle Assemblies

Self-Organization of Plasmonic and Excitonic Nanoparticles into Resonant Chiral Supraparticle Assemblies

Equilibrium cluster fluids: pair interactions via inverse design

Controlled Formation of Patchy Anisometric Fumed Silica Supraparticles in Droplets on Bent Superhydrophobic Surfaces

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