期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 121, 期 24, 页码 13405-13411出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.7b04234
关键词
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资金
- Ministerio de Economia y Competitividad and European Regional Development Fund [MAT2015-65011-P]
- Swiss National Science Foundation [160553, 2000-20_152 557/1]
Most syntheses of thiolate-protected metal nanoparticles (NPs) include a thermochemical step in which the as-prepared, polydisperse NPs are transformed to a narrower size distribution in a poorly understood process known as digestive ripening (DR). Previous theoretical approaches considered either surface and electrostatic contributions or surface and ligand-binding contributions. We show that the three contributions :are needed to obtain theoretical predictions in agreement with experimental observations. Although statistical therModynamics does not clarify mechanistic detail's; it certainly;provides valuable insights on the DR process. Remarkably, a relatively simple theory with no fitting parameters satisfactorily explains the roles of the metd:ligand ratio, the NP charge, the relative permittivity of the solvent, the ripening temperature, the binding energy, and the ligand chain length.
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