Self-assembly of uniform polyhedral silver nanocrystals into densest packings and exotic superlattices

Henzie, Joel; Grünwald, Michael; Widmer‐Cooper, Asaph; Geissler, Phillip L.; Yang, Peidong

doi:10.1038/nmat3178

Cited by 559 publications

(566 citation statements)

References 32 publications

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“…Such breakthroughs have taken advantage of the unique physicochemical consequences (for example, surface plasmon resonance, superparamagenetism, excellent luminescence properties, high surface-to-volume ratio and high signal-tonoise ratio, and so on) that arise from varying the size, composition, shape and arrangement of nanomaterials. [10][11][12] Plain lipid structures can be transformed into versatile hybrid nanostructures if nanostructures are used as a solid support. Lipid-nanostructure hybrids often exhibit new structures and properties that cannot be obtained with single components.…”

Section: Introductionmentioning

confidence: 99%

Lipid-nanostructure hybrids and their applications in nanobiotechnology

Lee

Nam

2013

NPG Asia Mater

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Cell membranes contain a variety of lipids and functional proteins that offer active platforms that organize the membrane components into functional assemblies and perform biologically important reactions. The dynamic and complex nature of the membranes makes them attractive materials, but at the same time, researchers report substantial experimental uncertainty in controlling the membrane reactions and extracting valuable information. The fascinating new structures and properties of nanomaterials could be utilized in addressing aforementioned issues, and the design and synthesis of lipid-nanostructure hybrids could be beneficial to the research areas in lipid-membrane biotechnology and nanobiotechnology. These hybrid structures possess dimensions that are comparable to that of biological molecules and structures and physicochemical properties that arise from both lipids and nanomaterials. Therefore, lipid-nanostructure hybrids offer additional options for control of the synthesized structures, provide new insight in understanding nanostructures and biological systems and allow the mimicking of functional subcellular membrane components and monitoring of the membrane-associated reactions in a highly sensitive and controllable manner. In this review, we present recent advances in the synthesis of various lipid-nanostructure hybrids and the application of these structures in biotechnology and nanotechnology. We further describe the scientific and practical applications of lipid-nanostructure hybrids for detecting membrane-targeting molecules, interfacing nanostructures with live cells and creating membrane-mimicking platforms to investigate various intercellular processes.

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Section: Introductionmentioning

confidence: 99%

Lipid-nanostructure hybrids and their applications in nanobiotechnology

Lee

Nam

2013

NPG Asia Mater

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Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] Such samples were used to experimentally study self-assembly and mesophase behavior. [6][7][8][9][10][11] Concurrently, new simulation techniques were developed to explain the experimentally observed phenomenology and to tackle the complex numerical problems that such investigations bring about. 8,[12][13][14][15][16][17][18][19][20][21][22][23] Most of these simulation studies focussed on convex particles in two-and three-dimensional (2D and 3D) systems, see Refs.…”

Section: Introductionmentioning

confidence: 99%

Phase diagram of octapod-shaped nanocrystals in a quasi-two-dimensional planar geometry

Graaf

Qiao

et al. 2013

The Journal of Chemical Physics

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Recently, we reported the formation of crystalline monolayers consisting of octapod-shaped nanocrystals (so-called octapods) that had arranged in a square-lattice geometry through drop deposition and fast evaporation on a substrate [W. Qi, J. de Graaf, F. Qiao, S. Marras, L. Manna, and M. Dijkstra, Nano Lett. 12, 5299 (2012)]. In this paper we give a more in-depth exposition on the Monte Carlo simulations in a quasi-two-dimensional (quasi-2D) geometry, by which we modelled the experimentally observed crystal structure formation. Using a simulation model for the octapods consisting of four hard interpenetrating spherocylinders, we considered the effect of the pod length-to-diameter ratio on the phase behavior and we constructed the full phase diagram. The methods we applied to establish the nature of the phase transitions between the various phases are discussed in detail. We also considered the possible existence of a Kosterlitz-Thouless-type phase transition between the isotropic liquid and hexagonal rotator phase for certain pod lengthto-diameter ratios. Our methods may prove instrumental in guiding future simulation studies of similar anisotropic nanoparticles in confined geometries and monolayers.

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“…3 One current example is provided by hard polyhedral particles, to which much numerical and experimental effort is being dedicated. [4][5][6] In theory and simulation, colloidal particles are indeed often assumed to interact through hard-body interactions as these are predominant in directing their packing and shown over the years to be sufficient for the stabilization of a variety of entropy-driven complex fluid phases: nematic (N), 7 smectic, 8 columnar (C), 9 and even cubic gyroid 10 phases can all be obtained in systems of hard-body particles of suitable shape and size.…”

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confidence: 99%

Phase behavior of hard spherical caps

Cinacchi

2013

The Journal of Chemical Physics

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This work reports on the phase behavior of hard spherical caps in the interval of particle shapes delimited by the hard platelet and hemispherical cap models. These very simple model colloidal particles display a remarkably complex phase behavior featuring a competition between isotropicnematic phase separation and clustering as well as a sequence of structures, from roundish to lacy aggregates to no ordinary hexagonal columnar mesophases, all characterized by groups of particles tending to arrange on the same spherical surface. This behavior parallels that one of many molecular systems forming micelles but here it is purely entropy-driven. © 2013 AIP Publishing LLC.[http://dx.doi.org/10.1063/1.4822038]The self-assembly of molecular and colloidal systems has always, and nowadays especially, attracted much attention. 1 Recently, in the case of colloids, there has been significant progress in the synthesis of particles of different shape and size as well as in the techniques to visualize the structures they form. 2 These experimental advances offer concrete chances to observe those phase behaviors predicted by theory and numerical simulation; new results from these can in turn stimulate further experimental research. 3 One current example is provided by hard polyhedral particles, to which much numerical and experimental effort is being dedicated. [4][5][6] In theory and simulation, colloidal particles are indeed often assumed to interact through hard-body interactions as these are predominant in directing their packing and shown over the years to be sufficient for the stabilization of a variety of entropy-driven complex fluid phases: nematic (N), 7 smectic, 8 columnar (C), 9 and even cubic gyroid 10 phases can all be obtained in systems of hard-body particles of suitable shape and size.This work considers a special class of hard-body model colloidal particles and examines by numerical simulation their phase behavior featuring both phase separation and aggregation phenomena.The particles are hard spherical caps (HSCs); a preliminary account of their intriguing phase behavior has been given in Ref. 11. Each of these particles is the portion of the surface of a sphere of radius R subtended by an angle θ . The area of this portion is set equal to σ 2 , with σ the unit of length; any particle of this type is thus identified by R* = R/σ (or θ ). By varying R*, hard, generally concave and infinitely thin, particles can be obtained going from the hard platelet, (R* → ∞), through the hard hemispherical cap (R * = 1/ √ 2π ), to the hard sphere (R * = 1/2 √ π) models. It is actually those lens-, bowl-, and vase-like particles that lay in between these limits that are most interesting.HSCs fit current interest for a variety of reasons. These are primarily fundamental but also related to the issues of a) Electronic mail: giorgio.cinacchi@uam.es practical relevance, given, e.g., the wide range of possibilities that nano-sized hollowed particles may offer in catalysis and drug delivery. 12 Several are the viewpoints HSCs can be ...

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Self-assembly of uniform polyhedral silver nanocrystals into densest packings and exotic superlattices

Cited by 559 publications

References 32 publications

Lipid-nanostructure hybrids and their applications in nanobiotechnology

Lipid-nanostructure hybrids and their applications in nanobiotechnology

Phase diagram of octapod-shaped nanocrystals in a quasi-two-dimensional planar geometry

Phase behavior of hard spherical caps

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