Two-Dimensional Clusters of Colloidal Particles Induced by Emulsion Droplet Evaporation

Hai, Pham Viet; Tran-Phan-Thuy, Linh; Tran-Manh, Cuong; Bich, Danh; Luc-Huy, Hoang

doi:10.3390/nano10010156

Cited by 7 publications

(4 citation statements)

References 49 publications

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“…The clusters are formed by polymerisation of the capillary bridges in the wet state, at moderate temperatures below 100 °C [21]. Pham-Van et al [50] hypothesised that these clusters form structures that minimise the second moment of mass distribution. Moreover, Yang et al [70] stated that thermal decomposition of the ink complex would be largely restricted in isolated clusters and as a result form a discontinuous film.…”

Section: Discussionmentioning

confidence: 99%

A novel approach to improve reliability of aerosol jet printing process

Winnicki,

Łapa,

Świadkowski

2024

Eksploatacja i Niezawodność – Maintenance and Reliability

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Additive manufacturing is gaining interest for printing of noble metals. In this study, aerosol jet printing was applied to fabricate traces from commercial silver nanoparticle ink. A self-built three dimensional printing machine was used without or with in-line substrate heating. Subsequently, sintering was conducted by furnace or near-infrared source. Examination of the sample using scanning electron and atomic force microscopy revealed the existence of both micro- and nanoscale pores in the structure. Local open porosity, aerosol extensive spatter and wide porous overspray were key defects found in samples printed without substrate heating. All the features affect the properties and reliability of silver prints. In-line process heating increased the concentration of nanoparticles and limited defects formation. The final structure was influenced by sintering method and its time. Elongated time of sintering decreased porosity and roughness of the printed traces. Nevertheless, IR sintering provided the smoothest sample surface, and significantly improved bonding of aggregates.

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Section: Discussionmentioning

confidence: 99%

A novel approach to improve reliability of aerosol jet printing process

Winnicki,

Łapa,

Świadkowski

2024

Eksploatacja i Niezawodność – Maintenance and Reliability

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“…While a polyiamond is a polyform (a collection of polygons with common edges) consisting of equilateral triangles, a polyhex is a polyform consisting of regular hexagons. Polyhexes are frequently encountered in the study of polycyclic aromatic hydrocarbons, − while recently, the correspondence between polyiamonds and 2D nanopores as well as colloidal clusters has been alluded to. In Figure A, we depict a nanopore formed by removing six atoms from the graphene lattice.…”

Section: Methodsmentioning

confidence: 99%

Enumerating Stable Nanopores in Graphene and Their Geometrical Properties Using the Combinatorics of Hexagonal Lattices

Thomas

Silmore

Sharma

et al. 2023

J. Chem. Inf. Model.

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Nanopores in two-dimensional (2D) materials, including graphene, can be used for a variety of applications, such as gas separations, water desalination, and DNA sequencing. So far, however, all plausible isomeric shapes of graphene nanopores have not been enumerated. Instead, a probabilistic approach has been followed to predict nanopore shapes in 2D materials, due to the exponential increase in the number of nanopores as the size of the vacancy increases. For example, there are 12 possible isomers when N = 6 atoms are removed, a number that theoretically increases to 11.7 million when N = 20 atoms are removed from the graphene lattice. In this regard, the development of a smaller, exhaustive data set of stable nanopore shapes can help future experimental and theoretical studies focused on using nanoporous 2D materials in various applications. In this work, we use the theory of 2D triangular "lattice animals" to create a library of all stable graphene nanopore shapes based on a modification of a well-known algorithm in the mathematical combinatorics of polyforms known as Redelmeier's algorithm. We show that there exists a correspondence between graphene nanopores and triangular polyforms (called polyiamonds) as well as hexagonal polyforms (called polyhexes). We develop the concept of a polyiamond ID to identify unique nanopore isomers. We also use concepts from polyiamond and polyhex geometries to eliminate unstable nanopores containing dangling atoms, bonds, and moieties. We verify using density functional theory calculations that such pores are indeed unstable. The exclusion of these unstable nanopores leads to a remarkable reduction in the possible nanopores from 11.7 million for N = 20 to only 0.184 million nanopores, thereby indicating that the number of stable nanopores is almost 2 orders of magnitude lower and is much more tractable. Not only that, by extracting the polyhex outline, our algorithm allows searching for nanopores with dimensions and shape factors in a specified range, thus aiding the design of the geometrical properties of nanopores for specific applications. We also provide the coordinate files of the stable nanopores as a library to facilitate future theoretical studies of these nanopores.

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“…They have been shown to self-assemble from colloids in the presence of a spatial heterogeneity, like in hydrodynamically driven assembly of sedimenting colloids in the presence of a substrate. [57][58][59] Within our control force ansatz, we investigate whether the shear flow planes are sufficient to stabilize these clusters.…”

Section: B Nonrigid Clustersmentioning

confidence: 99%

Variational design principles for nonequilibrium colloidal assembly

Das,

Limmer

2020

Preprint

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Using large deviation theory and principles of stochastic optimal control, we show that rare molecular dynamics trajectories conditioned on assembling a specific target structure encode a set of interactions and external forces that lead to enhanced stability of that structure. Such a relationship can be formulated into a variational principle, for which we have developed an associated optimization algorithm and have used it to determine optimal forces for targeted self-assembly within nonequilibrium steady-states. We illustrate this perspective on inverse design in a model of colloidal cluster assembly within linear shear flow. We find that colloidal clusters can be assembled with high yield using specific short-range interactions of tunable complexity. Shear decreases the yields of rigid clusters, while small values of shear increase the yields of nonrigid clusters. The enhancement or suppression of the yield due to shear is rationalized with a generalized linear response theory. By studying 21 unique clusters made of 6, 7 or 8 particles, we uncover basic design principles for targeted assembly out of equilibrium.

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Two-Dimensional Clusters of Colloidal Particles Induced by Emulsion Droplet Evaporation

Cited by 7 publications

References 49 publications

A novel approach to improve reliability of aerosol jet printing process

A novel approach to improve reliability of aerosol jet printing process

Enumerating Stable Nanopores in Graphene and Their Geometrical Properties Using the Combinatorics of Hexagonal Lattices

Variational design principles for nonequilibrium colloidal assembly

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