Evaporation-driven manipulation of nanoscale brickwork structures for the design of 1D, 2D, and 3D microarrays of rectangular building blocks

Imai, Hiroaki; Matsumoto, Riho; Takasaki, Mihiro; Tsukiyama, Keishi; Sawano, Keisuke; Nakagawa, Yoshitaka

doi:10.1039/c9ce00960d

Cited by 9 publications

(11 citation statements)

References 61 publications

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“…The fabrication of novel nanostructured materials via nanoparticle aggregation and self-assembly has proven to be one of the most promising superstructure formation pathways in the last decade [ 1 , 2 , 3 , 4 , 5 , 6 ]. The inherent particle-mediated nonclassical crystallization pathway of these processes has raised increasing scientific attention in more recent research [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. Consequently, researchers have discovered that the behavior of a controlled aggregation and self-assembly can further be utilized to create astounding new materials with exciting properties [ 6 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Mesocrystals from Platinum Nanocubes

Jenewein

Cölfen

2021

Nanomaterials

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Platinum nanoparticles are widely known for their numerous electrochemical and catalytic applications. Enhanced or novel properties that may arise when ordering such particles in a highly defined manner, however, are still subject to ongoing research, as superstructure formation on the mesoscale is still a major challenge to be overcome. In this work, we therefore established a reproducible method to fabricate micrometer-sized superstructures from platinum nanocubes. Through small-angle X-ray scattering and electron diffraction methods we demonstrate that the obtained superstructures have a high degree of ordering up to the atomic scale and, therefore, fulfill all criteria of a mesocrystal. By changing the solvent and stabilizer in which the platinum nanocubes were dispersed, we were able to control the resulting crystal habit of the mesocrystals. Aside from mesocrystal fabrication, this method can be further utilized to purify nanoparticle dispersions by recrystallization with respect to narrowing down the particle size distribution and removing contaminations.

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Section: Introductionmentioning

confidence: 99%

Mesocrystals from Platinum Nanocubes

Jenewein

Cölfen

2021

Nanomaterials

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“…In general, such systems containing NCs as building units can be characterized as colloidal crystals [35]. A special subspecies of these colloidal crystals are mesocrystals [36][37][38][39][40]. As soon as the NC subunits that build up a colloidal crystal are anisotropic and the alignment of those occurred on a long-range order, one can speak of a mesocrystal [41,42].…”

Section: Introductionmentioning

confidence: 99%

Environmentally Benign Formation of Nickel Hexacyanoferrate-Derived Mesoframes for Heterogeneous Catalysis

et al. 2021

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The tetramethylammonium hydroxide (TMAH)-controlled alkaline etching of nickel hexacyanoferrate (NiHCF) mesocrystals is explored. The alkaline etching enables the formation of hollow framework structures with an increased surface area, the exposure of active Ni and Fe sites and the retention of morphology. The ambient reaction conditions enable the establishment of a sustainable production. Our work reveals novel perspectives on the eco-friendly synthesis of hollow and colloidal superstructures for the efficient degradation of the organic contaminants rhodamine-B and bisphenol-A. In the case of peroxomonosulfate (PMS)-mediated bisphenol-A degradation, the rate constant of the etched mesoframes was 10,000 times higher indicating their significant catalytic activity.

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“…29 In the last few years, many research groups have reported on assembly techniques of micrometer-sized mesocrystals of platinum, magnetite, lead sulfide, and silver amongst other materials. 8,[30][31][32][33][34][35][36][37][38] They have shown remarkable structures of mesocrystals, which are perfectly regular and feature well-defined facets, like "classical" crystals. Commonly, nanocrystals are assembled to mesocrystals either via "drying mediated assembly methods" or via the "gas phase diffusion technique".…”

Section: Introductionmentioning

confidence: 99%

Morphogenesis of Magnetite Mesocrystals: Interplay Between Nanoparticle Morphology and Solvation Shell

Brunner¹,

Maier²,

Thomä³

et al. 2021

Preprint

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In this study, faceted mesocrystals have been assembled from the dispersion of truncated cubic-shaped iron oxide nanoparticles stabilized by oleic acid (OA) molecules using the non-solvent “gas phase diffusion technique” into an organic solvent. The effects of synthesis conditions as well as of the nanoparticle size and shape on the structure and morphogenesis of mesocrystals were examined. The interactions of OA capped iron oxide nanoparticles with solvent molecules were probed by analytical ultracentrifugation and double difference pair distribution function analysis. It was shown that the structure of the organic shell significantly depends on the nature and polarity of solvent molecules.

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Evaporation-driven manipulation of nanoscale brickwork structures for the design of 1D, 2D, and 3D microarrays of rectangular building blocks

Abstract: As children play with wooden building blocks, we would like to construct elaborate architectures through the one-by-one accumulation of nanocrystals.

Cited by 9 publications

References 61 publications

Mesocrystals from Platinum Nanocubes

Mesocrystals from Platinum Nanocubes

Environmentally Benign Formation of Nickel Hexacyanoferrate-Derived Mesoframes for Heterogeneous Catalysis

Morphogenesis of Magnetite Mesocrystals: Interplay Between Nanoparticle Morphology and Solvation Shell

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