Magnetic field–driven assembly and reconfiguration of multicomponent supraparticles

Abstract

Suprastructures at the colloidal scale must be assembled with precise control over local interactions to accurately mimic biological complexes. The toughest design requirements include breaking the symmetry of assembly in a simple and reversible fashion to unlock functions and properties so far limited to living matter. We demonstrate a simple experimental technique to program magnetic field–induced interactions between metallodielectric patchy particles and isotropic, nonmagnetic “satellite” particles. By controlling the connectivity, composition, and distribution of building blocks, we show the assembly of three-dimensional, multicomponent supraparticles that can dynamically reconfigure in response to change in external field strength. The local arrangement of building blocks and their reconfigurability are governed by a balance of attraction and repulsion between oppositely polarized domains, which we illustrate theoretically and tune experimentally. Tunable, bulk assembly of colloidal matter with predefined symmetry provides a platform to design functional microstructured materials with preprogrammable physical and chemical properties.

Confined space design by nanoparticle self-assembly

“…Moreover, as shown by Harraq et al, SP post-assembly modification via external stimuli can lead to SP reconfiguration, modulating guest's uptake and SP behaviour, thus allowing a single architecture to perform a variety of functions. 101 Finally, SP external surface modification can be employed to tune SP porosity and recognition properties, offering a further possibility to modulate SP guest ability. 101 One of the unmet challenges in SP design is represented by the use of anisotropic NPs as building blocks.…”

“…101 Finally, SP external surface modification can be employed to tune SP porosity and recognition properties, offering a further possibility to modulate SP guest ability. 101 One of the unmet challenges in SP design is represented by the use of anisotropic NPs as building blocks. Indeed, although several research groups have investigated self-organization of anisotropic NPs, 102 the development of 3D SPs bearing confined nanocavities is still limited and isotropic NPs remain the preferred building blocks for confined SPs synthesis.…”

“… 101 Finally, SP external surface modification can be employed to tune SP porosity and recognition properties, offering a further possibility to modulate the SP guest ability. 101 …”

Collision and separation of nickel particles embedded in a polydimethylsiloxan matrix under a rotating magnetic field: A strong magneto active function

“…Even though the Ni particles are themselves 3D objects with well-defined dimensions, the assumption to treat the magnetizable Ni particles as point-like dipoles is valid for substantial particle separation [20, [53][54][55][56]. This is also validated in [26] by comparing experimental results with a theoretical approach, where well-separated particles experience distance oscillation during rotation of the external field.…”

Basic concepts and physical-chemical phenomena, that have conceptual meaning for the formation of systemic clinical thinking and formalization of the knowledge of systemic structural-functional organization of the human’s organism

“…Объективность этого тезиса подтверждается не только теоретическими заключениями и применением силовых полей метода молекулярной динамики, но и результатами экспериментальных исследований (рис. 17) [350,351].…”