4.6 Article

Structure of gold nanoparticles suspended in water studied by x-ray diffraction and computer simulations

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PHYSICAL REVIEW B
卷 72, 期 19, 页码 -

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AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.72.195402

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Gold nanoparticles with an average size of 3 nm, 15 nm, and 30 nm suspended in water have been studied by x-ray diffraction and computer simulations. The atomic pair distribution function approach was employed to determine the three-dimensional structure because of the limited structural coherence in these nanostructured materials. The nanoparticles possess a well-defined atomic arrangement resembling the face-centered cubic (fcc) structure occurring with bulk gold. The fcc-type features of this arrangement become more prominent with increasing nanoparticle size. The study provides a clear picture of the nanoparticles' size-structure relationship and can help open up the route for calculating and predicting of their useful properties.

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