6533b7defe1ef96bd1276617
RESEARCH PRODUCT
Enhanced Thermal Stability of Gold and Silver Nanorods by Thin Surface Layers
Litao SunChristian OhmAnd Florian BanhartYuriy KhalavkaCarsten Sönnichsensubject
Surface diffusionMaterials scienceMelting temperatureNanotechnologySurfaces Coatings and FilmsElectronic Optical and Magnetic MaterialsIn situ transmission electron microscopyGeneral EnergyChemical engineeringSPHERESThermal stabilitySublimation (phase transition)NanorodPhysical and Theoretical ChemistrySilver nanorodsdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-08-16 | The Journal of Physical Chemistry C |