We demonstrate by density functional theory calculations that the morphology of a An nanoparticle can be transformed by interactions with a CO atmosphere. Even at low pressure and at room temperature, the population of low-coordinated An atoms is increased significantly, which affects electronic, optical, and chemical properties. The mechanism for this effect is the strong dependence of the CO adsorption energy on the coordination number of the adjacent Au atom.
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McKenna et al. (2007) studied this question.
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