Chemically induced self-assembly of spherical and anisotropic inorganic nanocrystals

Баранов, Д. А.; Manna, Liberato; Kanaras, Antonios G.

doi:10.1039/c1jm11599e

Cited by 45 publications

(33 citation statements)

References 129 publications

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“…[1][2][3][4][5][6][7] Sensing with NPs often depends on the ability to selectively form aggregates. [1][2][3][4][5][6][7] Sensing with NPs often depends on the ability to selectively form aggregates.…”

mentioning

confidence: 99%

Setting the Environmental Conditions for Controlling Gold Nanoparticle Assemblies

et al. 2012

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mentioning

confidence: 99%

Setting the Environmental Conditions for Controlling Gold Nanoparticle Assemblies

et al. 2012

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“…7,8 The majority of chemically triggered nanoscale assembly procedures rely on the intrinsic surface properties of the building blocks. 9 The size and shape of the particles has also significant influence on the resulting structure. Rod-like objects can benefit simultaneously from shape and surface chemistry anisotropy (patchiness), making them excellent candidates for directed assembly.…”

Section: Introductionmentioning

confidence: 99%

Assembling patchy nanorods with spheres: limitations imposed by colloidal interactions

et al. 2016

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For gold nanorods the intrinsic shape-anisotropy offers the prospect of anisotropic assembly, provided their regionselective surface modification can be realized. Here we developed a nanorod with patchy surface chemistry, featuring positively charged molecules in the tip region and polymer molecules at the sides by careful control of molecule concentrations during ligand exchange. When these patchy nanorods are assembled with small negatively spherical particles, electric double layer interaction can direct the assembly of two nanospheres at the opposite ends of the nanorods. The PEG chains promote the selectivity of the procedure. As the size of the nanospheres increases, they start to shift towards the side of the nanorod due to increased van der Waals interaction. When the relative size of the nanospheres is even larger, only a single nanoshpere is assembled, but instead of the tip region, they are attached to side of the nanorods. The apparent cross-over of the region-selectivity can be interpreted in terms of colloidal interactions, i.e. the second spherical particle is excluded due to nanosphere-nanosphere electric double layer repulsion, while the large vdW attraction result in a side positioning of the single adsorbed spherical particle. The results underline the importance of absolute values of the different interaction strengths and length scales in the programmed assembly of pathy nanoscale building blocks.

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“…This is achieved by manipulation of the surface of nanocrystals or nanocrystals/solvent interface by means of chemical stimuli (Baranov et al 2011, Pileni 2012. It is frequently used for fabrication of transition metals (metal oxide) catalysts combining high inter-crystalline interface with high surface area.…”

Section: Engineering Of Contact Interface Between the Particles In Namentioning

confidence: 99%

Grain boundaries in nanocrystalline catalytic materials as a source of surface chemical functionality

Landau

Vidruk

Vingurt

et al. 2014

Reviews in Chemical Engineering

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This review considers for the first time the effects in heterogeneous catalysis of grain boundaries (GB) created as a result of consolidation of catalytic materials nanoparticles without their sintering. Different methods proposed for quantitative characterization of nanoparticles consolidation extent were considered together with theoretical basis for increasing of catalytic activity at the GB surface areas between consolidated nanocrystals of metals and metal oxides. The review systemizes the GB effects observed in different areas of heterogeneous catalysis implementing metallic and oxide catalysts with acidic, basic, and redox surface functionality. The review analyzed experimental data that demonstrated the fine details of the structure of GB's. Their contribution to improving the performance of catalytic materials should be accounted for in development of novel catalysts and deeper understanding of catalysts functioning.

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Chemically induced self-assembly of spherical and anisotropic inorganic nanocrystals

Cited by 45 publications

References 129 publications

Setting the Environmental Conditions for Controlling Gold Nanoparticle Assemblies

Setting the Environmental Conditions for Controlling Gold Nanoparticle Assemblies

Assembling patchy nanorods with spheres: limitations imposed by colloidal interactions

Grain boundaries in nanocrystalline catalytic materials as a source of surface chemical functionality

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