Au nanoparticles encapsulated in Ru carbonyl carboxylate shells.
Au nanoparticles encapsulated in Ru carbonyl carboxylate shells.
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Au 纳米颗粒封装在 Ru 羰基羧酸盐壳中。
DOI：
10.1021/la060784f
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
W. Sim
中科院分区：
文献类型：
--
作者：
Suhua Wang;W. Sim
采用两步表面功能化方法，通过中间表面结合巯基丙烷酸与钌十二羰基（Ru3(CO)12）簇的反应，将金纳米颗粒包裹在单层有机金属钌配合物壳中。振动（红外和拉曼）光谱显示，羧酸基团插入到Ru簇中导致其断裂，并形成Ru二羰基羧酸低聚物的壳，通过原始的金烷硫酸键仍然附着在Au纳米颗粒上。通过x射线光电子能谱、x射线衍射和透射电子显微镜验证了金属纳米粒金芯的结构完整性。金属有机钌配合物的壳层可通过热分解去除巯基丙酸酯和羰基，形成Au和RuO2的混合相。
A two-step surface functionalization approach has been used to encase Au nanoparticles in monolayer organometallic Ru-complex shells by the reaction of an intermediate surface-bound mercaptopropanoic acid capping species with Ru dodecacarbonyl (Ru3(CO)12) clusters. Vibrational (infrared and Raman) spectroscopy shows that insertion of carboxylate groups into the Ru clusters results in their fragmentation and the formation of a shell of Ru dicarbonyl carboxylate oligomers that remain attached to the Au nanoparticles through the original Au-alkanethiolate bonds. The structural integrity of the metallic nanoparticulate Au cores has been verified by X-ray photoelectron spectroscopy, X-ray diffraction, and transmission electron microscopy. The organometallic Ru-complex shell may be decomposed thermally to eliminate the mercaptopropanoate and carbonyl groups and leave a mixed phase of Au and RuO2.