Thermodynamic Study of the Reactivity of the Two Topological Point Defects Present in Mixed Self-Assembled Monolayers on Gold Nanoparticles

Authors

  • Gretchen A. DeVries,

    1. Department of Materials Science & Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue 13-4053, Cambridge, MA 02139 (USA)
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  • Frajovon R. Talley,

    1. Department of Materials Science & Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue 13-4053, Cambridge, MA 02139 (USA)
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  • Randy P. Carney,

    1. Department of Materials Science & Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue 13-4053, Cambridge, MA 02139 (USA)
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  • Francesco Stellacci

    Corresponding author
    1. Department of Materials Science & Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue 13-4053, Cambridge, MA 02139 (USA)
    • Department of Materials Science & Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue 13-4053, Cambridge, MA 02139 (USA).
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  • We are grateful to Prof. M. Rubner for insightful discussions. F.S. and G.A.D. acknowledge the Packard Foundation and the NSF CAREER (DMR 06-45323) awards. R.P.C. and F.R.T. acknowledge the NSF REU program of the MRSEC Program at MIT (DMR 02-13282). Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

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When a mixed self-assembled monolayer forms on the curved surface of a gold nanoparticle two opposed point defects must form for topological reasons. Here we present a thermodyn amic study proving that these defects are more reactive than other sites on the nanoparticle, and demonstrate that the energy of the react ion depends on the ligand molecules (see figure).

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