Feng Ziqi, Jia Yun, Cui Hongyou
School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255000, China.
School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255000, China.
J Colloid Interface Sci. 2024 Oct 15;672:1-11. doi: 10.1016/j.jcis.2024.05.217. Epub 2024 May 31.
In this work, we reported that by using a strong thiol ligand as the morphology-directing reagent, a series of Au nanoparticles with plate-like surface sub-structures could be successfully obtained via a one-pot seedless synthesis. The size and the density of the plates on the surface of Au can be readily tuned with the amount of the thiol ligand, resembling different roughness of the surface. Arising from the different surface roughness, the localized surface plasmon resonance (LSPR) of these shape and morphological alike Au nanoparticles can be continuously tuned within the visible-NIR region. The broad LSPR absorptions and feasible tunability make the Au nanoparticles suitable candidate for plasmonic-related applications. Interestingly, huge SERS enhancement was simultaneously achieved based on the specific surface roughness. Our results demonstrate the great potentials for tuning the LSPR and SERS of Au nanostructures through the engineering of the surface morphologies, which would assist for the design, synthesis, and applications of Au-based plasmonic nanomaterials in various fields.
在这项工作中，我们报道了通过使用强硫醇配体作为形貌导向试剂，能够通过一锅无籽合成成功获得一系列具有板状表面亚结构的金纳米颗粒。金表面板的尺寸和密度可通过硫醇配体的量轻松调节，类似于不同的表面粗糙度。由于不同的表面粗糙度，这些形状和形态相似的金纳米颗粒的局域表面等离子体共振（LSPR）可以在可见-近红外区域内连续调节。宽泛的LSPR吸收和可行的可调性使金纳米颗粒成为等离子体相关应用的合适候选者。有趣的是，基于特定的表面粗糙度同时实现了巨大的表面增强拉曼散射（SERS）增强。我们的结果证明了通过表面形貌工程调节金纳米结构的LSPR和SERS的巨大潜力，这将有助于金基金属等离子体纳米材料在各个领域的设计、合成和应用。
