Sequential Symmetry-Breaking Events as a Synthetic Pathway for Chiral Gold Nanostructures with Spiral Geometries
Sequential Symmetry-Breaking Events as a Synthetic Pathway for Chiral Gold Nanostructures with Spiral Geometries
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DOI：
10.1021/acs.nanolett.0c05105
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发表时间：
2021-03-25
期刊：
影响因子：
10.8
通讯作者：
Neretina, Svetlana
中科院分区：
文献类型：
--
作者：
Golze, Spencer D.;Porcu, Stefania;Neretina, Svetlana
对称性破坏合成控制允许与材料的潜在晶体对称性相反的纳米结构几何形状。如果适当地应用，这样的控制提供了驱动各向同性金属沿着生长路径产生三维手性几何形状的手段。在这里，我们提出了一种光驱动的解决方案为基础的合成产生螺旋金螺旋从基板结合的种子。设计的生长模式依赖于三个独立的晶体破坏事件迎来的种子内衬与平面缺陷，盖帽剂，严重挫败早期阶段的增长，和库仑排斥时发生的电荷相同的增长前线碰撞。它们一起联合收割机以推进生长路径，其中平面生长从种子的一侧发出，从顺时针和逆时针方向前进以包围种子，然后，在两个生长前沿碰撞时，看到一个前沿在另一个前沿之上升起，以实现自我永存的三维螺旋结构。
Symmetry-breaking synthetic controls allow for nanostructure geometries that are counter to the underlying crystal symmetry of a material. If suitably applied, such controls provide the means to drive an isotropic metal along a growth pathway yielding a three-dimensional chiral geometry. Herein, we present a light-driven solution-based synthesis yielding helical gold spirals from substrate-bound seeds. The devised growth mode relies on three separate symmetry-breaking events ushered in by seeds lined with planar defects, a capping agent that severely frustrates early stage growth, and the Coulombic repulsion that occurs when identically charged growth fronts collide. Together they combine to advance a growth pathway in which planar growth emanates from one side of the seed, advances to encircle the seed from both clockwise and counterclockwise directions, and then, upon collision of the two growth fronts, sees one front rise above the other to realize a self-perpetuating three-dimensional spiral structure.