Abstract：
The metal plasmonic nanostructure has the optical property of plasmon resonance, which holds great potential for development in nanophotonics, bioelectronics, and molecular detection. However, developing a general and straightforward method to prepare metal plasmonic nanostructures with a controllable size and morphology still poses a challenge. Herein, we proposed a synthesis strategy that utilized a customizable self-assembly template for shape-directed growth of metal structures. We employed gold nanoparticles (AuNPs) as connectors and DNA nanotubes as branches, customizing gold nanoparticle-DNA origami composite nanostructures with different branches by adjusting the assembly ratio between the connectors and branches. Subsequently, various morphologies of plasmonic metal nanostructures were created using this template shape guided strategy, which exhibited enhancement of surface-enhanced Raman scattering (SERS) signals. This strategy provides a new approach for synthesizing metallic nanostructures with multiple morphologies and opens up another possibility for the development of customizable metallic plasmonic structures with broader applications.
摘要：
金属等离子体纳米结构具有等离子体共振的光学性质,这在纳米光子学中具有巨大的发展潜力，生物电子学,和分子检测。然而,开发一种通用和直接的方法来制备具有可控尺寸和形态的金属等离子体纳米结构仍然是一个挑战。在这里，我们提出了一种合成策略，该策略利用可定制的自组装模板进行金属结构的形状定向生长。我们使用金纳米粒子（AuNP）作为连接器和DNA纳米管作为分支，通过调整连接器和分支之间的组装比例来定制具有不同分支的金纳米颗粒-DNA折纸复合纳米结构。随后，使用这种模板形状引导策略创建了等离子体金属纳米结构的各种形态，表现出表面增强拉曼散射（SERS）信号的增强。这种策略为合成具有多种形态的金属纳米结构提供了一种新方法，并为开发具有更广泛应用的可定制金属等离子体结构开辟了另一种可能性。
