Surfactant‐Assisted Symmetry Breaking in Colloidal Gold Nanocrystal Growth,ChemNanoMat

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Surfactant‐Assisted Symmetry Breaking in Colloidal Gold Nanocrystal Growth
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-03-31 , DOI: 10.1002/cnma.201900754
Guillermo González‐Rubio ₁ , Leonardo Scarabelli ₂ , Andrés Guerrero‐Martínez ₃ , Luis M. Liz‐Marzán _{4,

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Affiliation

Colloidal anisotropic gold nanocrystals play a central role in the field of plasmonics owing to their tunable optical activity across a wide spectral range. However, achieving sufficient optical quality for practical implementation requires advanced synthetic protocols yielding gold nanocrystals with the desired morphology and plasmonic properties. This Minireview focuses on a fundamental step during the growth of anisotropic nanocrystals, namely symmetry breaking. In connection with thermodynamic and kinetic control of nanocrystal growth, we discuss the complex interplay between the role of seed morphology and that of surfactants, shape‐directing additives and reducing agents. We revisit some iconic syntheses of anisotropic gold nanoparticles, including nanorods, nanotriangles, and nanobipyramids. Finally, we analyze the use of co‐surfactants as an emerging strategy to disconnect the symmetry breaking event from the anisotropic growth process, overcoming current limitations in the synthesis of anisotropic gold nanocrystals.

中文翻译：

表面活性剂辅助对称性破坏胶体金纳米晶体的生长

胶体各向异性金纳米晶体由于在很宽的光谱范围内具有可调的光学活性，因此在等离激元学领域起着核心作用。但是，要实现足够的光学质量以进行实际实施，就需要先进的合成方案，以产生具有所需形态和等离子体性能的金纳米晶体。这份迷你回顾的重点是各向异性纳米晶体生长过程中的一个基本步骤，即对称性破坏。关于纳米晶体生长的热力学和动力学控制，我们讨论了种子形态与表面活性剂，形状导向添加剂和还原剂之间的复杂相互作用。我们重新审视了各向异性金纳米颗粒的一些标志性合成方法，包括纳米棒，纳米三角形和纳米双锥体。最后，

更新日期：2020-03-31

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