Abstract
Self-organized dendritic architecture is of fundamental importance and its application can be used in many natural and industrial processes. Nanopost arrays are usually used in the applications of reflecting grating and changing the material surface wettability. However, in recent research, it is found that nanopost arrays can be fabricated as passive components to induce the dendritic self-organizaed hierarchical architectures. Via this simplified Phase-Field based finite element simulation, the surface dendritic self-organized architecture morphology and expanding speed in the growing path can be controlled by nanopost structures. In addition, nanopost array arrangement on the surface affects the hierarchal architecture branching distribution. Finally, with an external applied force introduced to the system, it enables the nanopost as an active component. It is found that nanopost surroundings significantly impact the final distribution of dendritic architectures which is qualitatively in agreement with experiments and induce these dendritic architectures to form assigned character patterns after the external driving forces are introduced into the system. This novel study can fundamentally study the dynamic physics of dendritic self-organized architecutes provide an indicator for the development of smart self-organized architecture, and a great opportunity for the creation of large-scale hierarchical structures.
Highlights
The formation and control of self-organized dendritic structure on microstructure has attracted a lot of attention in recent years [1,2,3,4,5,6,7,8]
The main goal of this study is to develope a generalized framework for studying dendritic architectures controlled by tailored passive geometric structures and/or active drives
From the simulation results, employing nanopost as a passive component induces hierarchal architecture to grow through the designed distribution to induce dendritic self-organization, and further become an active component through an external driving force to affect the self-organized architecture distribution when a specific mutual interaction is applied to the nanopost surface
Summary
The formation and control of self-organized dendritic structure on microstructure has attracted a lot of attention in recent years [1,2,3,4,5,6,7,8]. The interest is due to the low cost, simple operation, and the spontaneous self-organization of the formation process. Self-assembly technology can assemble molecules of a special nature from a disordered state into an ordered construction without any external driving forces. It has been massively applied as sensing. The fabrication of self-organized structure usually comes with various morphologies under different conditions. The branching direction and angles among these branches are usually arbitrary and lack control due to the nature of random aggregation, which makes pattern predicition difficult and limits the application of such structures
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