Heat Induced Dynamics of Gold Nanoparticles on Atomically Clean Graphene 103 Heat Induced Dynamics of Gold Nanoparticles on Atomically Clean Graphene
نویسنده
چکیده
We designed a graphene based TEM sample carrier to enable atomically resolved studies of the heat-induced evolution of deposits on graphene. By in-situ application of electric current to a freestanding sheet of graphene, we obtain local temperatures exceeding 1000K. We investigated various heat induced phenomena of gold particles on an atomically clean graphene surface. Initially, the gold nanoislands decrease their surface-area-to-volume ratio with increasing temperature by assuming a more spherical shape. At higher temperatures, we observe their migration and a self-organization into parallel straight lines.
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