材料科学
空格(标点符号)
纳米技术
化学空间
化学工程
化学
计算机科学
工程类
生物化学
操作系统
药物发现
作者
Ana Sánchez‐Iglesias,Marek Grzelczak
出处
期刊:Small
[Wiley]
日期:2024-11-09
卷期号:21 (2): e2407735-e2407735
被引量:4
标识
DOI:10.1002/smll.202407735
摘要
Abstract Gold bipyramids (AuBPs), despite having superior properties compared to their spectroscopically similar counterparts, gold nanorods, have found comparatively limited applications. This discrepancy is primarily due to the lack of protocols to tailor their dimensions. Typically, the concentration of Au seeds is virtually the sole factor that determines the aspect ratio and thus, the optical properties of AuBPs. As a result, varying the volumes of AuBPs while incurring minimal changes to their optical spectra remains a synthetically non‐trivial task. Here, the chemical space in the seeded growth of AuBPs, is expanded by exploiting the interplay between bromide, silver ions, and seed concentration for tuning the final dimensions and optical properties of AuBPs. Specifically, a 6 fold change in volumes of AuBPs is achieved while maintaining the fixed plasmon band position. Further overgrowth of as‐prepared bipyramids broadens the realizable dimensions without compromising quality and initial morphology. Overall, the results expand the chemical toolbox in the wet‐chemistry synthesis of anisotropic gold nanoparticles, which is relevant for health, colorimetric sensors, and energy applications.
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