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Influence of Bound versus Non-Bound Stabilizing Molecules on the Thermal Stability of Gold Nanoparticles
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-06-16 00:00:00 , DOI: 10.1021/acs.jpcc.7b04266 Shirin R. King 1 , Susan Shimmon 1 , Daniel D. Totonjian 1 , Andrew M. McDonagh 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-06-16 00:00:00 , DOI: 10.1021/acs.jpcc.7b04266 Shirin R. King 1 , Susan Shimmon 1 , Daniel D. Totonjian 1 , Andrew M. McDonagh 1
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Knowledge concerning the sintering behavior of gold nanoparticles (AuNPs) allows for improved nanomaterials for applications such as printed electronics, catalysis and sensing. In this study, we examined the ability of a range of compounds to stabilize AuNPs against thermal sintering and compared compounds with and without functional groups that anchor the molecules to the nanoparticle surface. Thermal stability was characterized in terms of the temperature of the sintering event (TSE) as well as thermogravimetric analysis and scanning electron microscopy. We show that anchored stabilizing compounds with high thermal stability are effective at preventing the sintering of AuNPs until the decomposition of the compound. A TSE of 390 °C was achieved using 1-pyrenebutanethiol as stabilizer. Of the unanchored stabilizers, which were combined with butanethiol-capped AuNPs, two were found to be particularly effective: oleylamine (TSE ≈ 300 °C) and a perylenedicarboximide derivative (TSE ≈ 540 °C), the latter conferring an unprecedented level of thermal stability on ligand-stabilized AuNPs. When selecting stabilizers without anchoring groups, our results demonstrate the importance of choosing those that have an affinity with the capping ligands on the AuNPs to ensure a uniform mixture of AuNPs and stabilizer within a film.
中文翻译：
结合稳定和非结合稳定分子对金纳米粒子热稳定性的影响
有关金纳米颗粒（AuNPs）烧结行为的知识可以改进用于印刷电子，催化和传感等应用的纳米材料。在这项研究中，我们研究了多种化合物稳定AuNPs防止热烧结的能力，并比较了具有和不具有将分子锚定在纳米粒子表面的官能团的化合物。热稳定性特征在于，所述烧结事件的温度（换算Ť SE）以及热重分析和扫描电子显微镜。我们表明，具有高热稳定性的锚定稳定化合物可有效防止AuNPs烧结直至化合物分解。一个牛逼SE使用1-庚烯丁硫醇作为稳定剂可达到390°C的温度。所述非锚定稳定剂，将其合并以硫醇封端的AuNP的两个被发现是特别有效的：油胺（Ť SE ≈300℃）和一个perylenedicarboximide衍生物（Ť SE ≈540℃），后者赋予前所未有的水平稳定性对配体稳定的AuNPs的影响。当不带锚定基团中选择的稳定剂，我们的结果表明选择那些与对金纳米粒子，所述封盖配体的亲和力，以确保的AuNP的薄膜内形成均匀的混合物和稳定剂的重要性。
更新日期：2017-06-28
中文翻译：
结合稳定和非结合稳定分子对金纳米粒子热稳定性的影响
有关金纳米颗粒（AuNPs）烧结行为的知识可以改进用于印刷电子，催化和传感等应用的纳米材料。在这项研究中，我们研究了多种化合物稳定AuNPs防止热烧结的能力，并比较了具有和不具有将分子锚定在纳米粒子表面的官能团的化合物。热稳定性特征在于，所述烧结事件的温度（换算Ť SE）以及热重分析和扫描电子显微镜。我们表明，具有高热稳定性的锚定稳定化合物可有效防止AuNPs烧结直至化合物分解。一个牛逼SE使用1-庚烯丁硫醇作为稳定剂可达到390°C的温度。所述非锚定稳定剂，将其合并以硫醇封端的AuNP的两个被发现是特别有效的：油胺（Ť SE ≈300℃）和一个perylenedicarboximide衍生物（Ť SE ≈540℃），后者赋予前所未有的水平稳定性对配体稳定的AuNPs的影响。当不带锚定基团中选择的稳定剂，我们的结果表明选择那些与对金纳米粒子，所述封盖配体的亲和力，以确保的AuNP的薄膜内形成均匀的混合物和稳定剂的重要性。
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