Electrochemical properties of monolayer-protected Au and Pd nanoparticles extracted from within dendrimer templates.
Electrochemical properties of monolayer-protected Au and Pd nanoparticles extracted from within dendrimer templates.
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DOI：
10.1021/la0507582
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发表时间：
2005-05
期刊：
影响因子：
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通讯作者：
Yong-Gu Kim;J. C. García-Martínez;R. Crooks
中科院分区：
文献类型：
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作者：
Yong-Gu Kim;J. C. García-Martínez;R. Crooks
描述了用树枝状分子模板法和萃取法制备的Au和Pd单分子层保护团簇的电化学性质。微分脉冲伏安法被用来估计的MPC的大小，并将结果进行了比较，显微镜下的数据和计算值。提取的Au和Pd纳米粒子的纯化是不需要获得明确定义的差分脉冲伏安峰所产生的量化的双层充电。计算的纳米颗粒的尺寸基本上是相同的那些从电化学数据确定。颗粒的电容与芯金属的组成无关。透射电子显微镜数据高估了最小的钯纳米粒子的大小，因为不足的点到点的分辨率。
The electrochemical properties of Au and Pd monolayer-protected clusters (MPCs), prepared by dendrimer-templating and subsequent extraction, are described. Differential pulse voltammetry was used to estimate the size of the MPCs, and the results were compared to microscopic data and calculated values. Purification of the extracted Au and Pd nanoparticles was not required to obtain well-defined differential pulse voltammetry peaks arising from quantized double-layer charging. The calculated sizes of the nanoparticles were essentially identical to those determined from the electrochemical data. The capacitance of the particles was independent of the composition of core metal. Transmission electron microscopy data overestimated the size of the smallest Pd nanoparticles because of inadequate point-to-point resolution.