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首页> 外文期刊>Applied Surface Science >Aliquat 336 stabilized multi-faceted gold nanoparticles with minimal ligand density
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Aliquat 336 stabilized multi-faceted gold nanoparticles with minimal ligand density

机译：Aliquat 336稳定的多面金纳米颗粒，具有最小的配体密度

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摘要

Using Methyltrioctylammonium chloride (Aliquat 336) as a shaping and stabilizing agent for the first time, quasi-spherical and multi-faceted gold (Au) nanoparticles (NPs) are synthesized via seed mediated protocol. These slightly elongated NPs devoid of any centre of symmetry are found to possess some twin defects on their surfaces as confirmed by TEM analysis. Their Surface plasmon resonance band is evidenced at 534 nm. The growth progression is examined through the formation of translational Au NPs during the reaction. Such Aliquat 336 stabilized NPs are demonstrated to achieve minimal ligand density. This is attributed to the formation of hexagonally patterned self-assembled monolayer of ligand molecules over the surface of Au NPs. TGA and DLS experiments are performed to quantify the ligand density on the surface of these multi-faceted Au NPs. EDX, FTIR, and XPS measurements are accomplished to determine the structure and binding of ligand molecules to Au surface. Further, these NPs are found to be luminescent with violet emission under an excitation at 320 nm. The admirable features of the results suggest that our method may constitute a basis for the facile synthesis of functionalized and luminescent multi-faceted Au NPs with minimal ligand density, potential for sundry biomedical applications. (C) 2015 Elsevier B.V. All rights reserved.
机译：首次使用甲基三辛基氯化铵（Aliquat 336）作为定型和稳定剂，通过种子介导的方法合成了准球形和多面金（Au）纳米粒子（NP）。如TEM分析所证实，发现这些没有任何对称中心的稍微伸长的NP在其表面上具有一些孪生缺陷。他们的表面等离子体共振带在534 nm处被证实。通过在反应过程中翻译金Au NPs的形成来检查生长进程。已证明此类Aliquat 336稳定的NP可实现最小的配体密度。这归因于在金纳米颗粒表面上形成了六边形图案的自组装配体分子单分子层。进行TGA和DLS实验以量化这些多面金纳米颗粒表面上的配体密度。完成EDX，FTIR和XPS测量，以确定配体分子与Au表面的结构和结合。此外，发现这些NP在320nm的激发下以紫光发射发光。结果令人钦佩的特征表明，我们的方法可为轻松合成功能化且发光的多面金纳米颗粒（具有最小的配体密度）奠定基础，这对于杂物生物医学应用具有潜力。 （C）2015 Elsevier B.V.保留所有权利。

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