Nanoscale Turing patterns in a bismuth monolayer
Nanoscale Turing patterns in a bismuth monolayer
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DOI：
10.1038/s41567-021-01288-y
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发表时间：
2021-07-08
期刊：
影响因子：
19.6
通讯作者：
Kapitulnik, Aharon
中科院分区：
文献类型：
--
作者：
Fuseya, Yuki;Katsuno, Hiroyasu;Kapitulnik, Aharon
图灵的形态发生反应扩散理论在理解从生物系统到沙丘的复杂物体内的宏观模式方面非常成功。然而，微观长度尺度上的图灵图案极其罕见。在这里，我们展示了在NbSe2表面组装的应变原子铋单分子膜-受原子间相互作用和动力学的影响-显示出图灵图案。我们的反应扩散模型产生了具有五个原子周期(约2 nm)的条纹图案和具有Y形结的磁区壁，这与实验观察到的结果惊人地相似。我们的工作证明，在硬凝聚态环境中，图灵图案可以发生在原子尺度上。在动物皮毛或皮肤等生物系统中看到的大尺度图案可以用图灵的反应扩散理论来描述。现在，图灵图案被证明也存在于铋单分子层中，这是一个典型的纳米级原子系统。
Turing's reaction-diffusion theory of morphogenesis has been very successful for understanding macroscopic patterns within complex objects ranging from biological systems to sand dunes. However, Turing patterns on microscopic length scales are extremely rare. Here we show that a strained atomic bismuth monolayer assembled on the surface of NbSe2-and subject to interatomic interactions and kinetics-displays Turing patterns. Our reaction-diffusion model produces stripe patterns with a period of five atoms (approximately 2 nm) and domain walls with Y-shaped junctions that bear a striking resemblance to what has been experimentally observed. Our work establishes that Turing patterns can occur at the atomic scale in a hard condensed-matter setting.Macroscale patterns seen in biological systems such as animal coats or skin can be described by Turing's reaction-diffusion theory. Now Turing patterns are shown to also exist in bismuth monolayers, an exemplary nanoscale atomic system.