0000000000427466

AUTHOR

And Florian Banhart

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Enhanced Thermal Stability of Gold and Silver Nanorods by Thin Surface Layers

2007

Using in situ transmission electron microscopy, we find that a carbon shell governs the morphological transitions of gold and silver nanorods upon heating. Encapsulated Ag nanorods show a surprising nonuniform sublimation behavior starting from one side and leaving behind the shell. Uncovered gold nanorods transform their shape to spheres well below the bulk melting temperature through surface diffusion, which is prevented by a thin carbon shell.

Surface diffusionMaterials scienceMelting temperatureNanotechnologySurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsIn situ transmission electron microscopyGeneral EnergyChemical engineeringSPHERESThermal stabilitySublimation (phase transition)NanorodPhysical and Theoretical ChemistrySilver nanorodsThe Journal of Physical Chemistry C
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