Macroscopic magnetic self-assembly

Löthman, Per A.

doi:10.3990/1.9789036545129

Cited by 4 publications

(2 citation statements)

References 64 publications

(102 reference statements)

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“…Adapted from [3] The whole tile system is placed in a reactor supplying energy to the system. In the case of DNA self-assembly, the energy is supplied in a form of heat [11], while the macroscale self-assembly often utilizes mechanical excitation [12], [13], [4], fans [14], or fluid turbulence [15]. The magnitude of agitation is specified by an integer valuetemperature.…”

Section: Tile-based Self-assemblymentioning

confidence: 99%

Self-Stabilizing Self-Assembly

Jílek¹,

Stránská²,

Somr³

et al. 2022

Preprint

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The emerging field of passive macro-scale tilebased self-assembly (TBSA) holds promise for enabling effective manufacturing processes by harnessing TBSA's intrinsic parallelism. However, the current TBSA methodology still does not fulfill its potential, largely because such assemblies are typically error-prone and the size of an individual assembly is limited by a lack of mechanical stability. Moreover, the instability issue becomes worse as assemblies become larger. Here, using a novel type of tile that is carried by a bristle-bot drive, we propose a framework that reverts this tendency; i.e., as an assembly grows, it becomes more stable. Using physicsbased computational experiments, we show that a system of such tiles indeed possesses self-stabilizing characteristics and enables building assemblies containing hundreds of tiles. These results indicate that one of the main current limitations of mechanical, agitation-based TBSA approaches might be overcome by employing a swarm of free-running sensorless mobile robots, herein represented by passive tiles at the macroscopic scale.

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Section: Tile-based Self-assemblymentioning

confidence: 99%

Self-Stabilizing Self-Assembly

Jílek¹,

Stránská²,

Somr³

et al. 2022

Preprint

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“…Apart from Nano sculpting as mentioned above numerous methods, such as chemical etching [29], vapor deposition [30], and electron beam [31], have been developed to fabricate nanoporous materials and control pore dimensions. Moreover, it is expected that facile methods such as self-assembly of graphene are just as suitable for nanoporous graphene as it is for impermeable graphene or grapheneoxide [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanopores

Löthman¹

2021

Nanopores

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Graphene is a two-dimensional, atomic thin, usually impermeable nanomaterial with astonishing electrical, magnetic and mechanical properties and can therefore at its own right be found in applications as sensors, energy storage or reinforcement in composite materials. By introducing nanoscale pores graphene alter and extend its properties beyond permeability. Graphene then resembles a nanoporous sensor, a nanoporous, atomic thin membrane which opens up for such varied applications such as water purification, industrial waste water treatment, mineral recovery, analytical chemistry separation, molecular size exclusion and supramolecular separations. Due to its nanoscopic size it can serve as nanofilters for ion separation even at ultralow nano- or picomolar concentrations. It is an obvious choice for DNA translocation, reading of the sequence of nucleotides in a DNA molecule, and other single molecular analyses as well for biomedical nanoscopic devices since dimensions of conventional membranes does not suffice in those applications. Even though graphene nanopores are known to be unstable against filling by carbon adatoms they can be stabilized by dangling bond bridging via impurity or foreign atoms resulting in a robust nanoporous material. Finally, graphene’s already exceptional electronic properties, its charge carriers exhibit an unusual high mobility and ballistic transport even at 300 K, can be made even more favorable by the presence of nanopores; the semimetallic graphene turns into a semiconductor. In the pores, semiconductor bands with an energy gap of one electron volt coexist with localized states. This may enable applications such as nanoscopic transistors.

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