Laaksonen Timo, Ruiz Virginia, Liljeroth Peter, Quinn Bernadette M
Division of Pharmaceutical Technology, Faculty of Pharmacy, University of Helsinki, PO Box 56, FIN-00014 University of Helsinki, Finland.
Chem Soc Rev. 2008 Sep;37(9):1836-46. doi: 10.1039/b713681c. Epub 2008 Jul 8.
Metal nanoparticles coated with an organic monolayer, so-called monolayer protected clusters (MPCs), can show quantised charging at room temperature due to their sub-attofarad capacitance arising from the core size and the nature of the protecting monolayer. In this tutorial review, we examine the factors affecting the energetics of MPC charging. In the first section, the underlying physics of quantised charging is outlined and we give an overview of the various methods that can be used to measure single electron transfer to nanoparticles. In the subsequent sections, we discuss how electrochemical measurements can be used to give information on the quantised charging of freely diffusing and films of immobilised MPCs. The predictions of models used to determine MPC capacitance are compared with experimental data from the literature.
涂覆有有机单层的金属纳米颗粒，即所谓的单层保护簇（MPC），由于其核心尺寸和保护单层的性质产生的亚阿法拉电容，在室温下可表现出量子化充电。在本教程综述中，我们研究了影响MPC充电能量学的因素。在第一部分，概述了量子化充电的基础物理学，并对可用于测量单电子向纳米颗粒转移的各种方法进行了综述。在随后的部分中，我们讨论了如何利用电化学测量来获取关于自由扩散的MPC和固定化MPC薄膜量子化充电的信息。将用于确定MPC电容的模型预测与文献中的实验数据进行了比较。
