Department of Organic Chemistry, ‡Department of Materials and Interfaces, and §Department of Chemical Research Support, The Weizmann Institute of Science , Rehovot 7610001, Israel.
Langmuir. 2018 Feb 20;34(7):2464-2470. doi: 10.1021/acs.langmuir.7b03125. Epub 2018 Feb 6.
We report here a new methodology for the formation of freestanding nanotubes composed of individual gold nanoparticles (NPs) cross-linked by coordination complexes or porphyrin molecules using WS nanotubes (INT-WS) as a template. Our method consists of three steps: (i) coverage of these robust inorganic materials with monodispersed and dense monolayers of gold NPs, (ii) formation of a molecular AuNP network by exposing these decorated tubes to solutions containing a ruthenium polypyridyl complex or meso-tetra(4-pyridyl)porphyrin, and (iii) removal of the INT-WS template with a hydrogen peroxide solution. Nanoindentation of the template-free AuNP tubes with atomic force microscopy indicates a radial elastic modulus of 4 GPa. The template-free molecular AuNP tubes are characterized using scanning and transmission electron microscopy, energy-dispersive X-ray spectroscopy, and micro-Raman spectroscopy. The methodology provides a convenient and scalable strategy for the realization of molecular AuNP tubes with a defined length and diameter, depending on the dimensions of the template.
我们在这里报告了一种新的方法，用于通过配位络合物或卟啉分子将由单个金纳米粒子（NPs）交联的独立纳米管形成，使用 WS 纳米管（INT-WS）作为模板。我们的方法包括三个步骤：（i）用单分散且密集的金 NPs 单层覆盖这些坚固的无机材料，（ii）通过将这些修饰的管暴露于含有钌多吡啶配合物或间四（4-吡啶基）卟啉的溶液中来形成分子 AuNP 网络，以及（iii）用过氧化氢溶液去除 INT-WS 模板。使用原子力显微镜对无模板 AuNP 管进行纳米压痕表明其径向弹性模量为 4 GPa。使用扫描和透射电子显微镜、能量色散 X 射线光谱和微拉曼光谱对无模板分子 AuNP 管进行了表征。该方法提供了一种方便且可扩展的策略，可根据模板的尺寸实现具有定义长度和直径的分子 AuNP 管。
