Experimental observation and characterization of amorphous carbon generated in graphene on gold nanoparticles.

ABSTRACT: The interaction of graphene with gold nanoparticles is investigated using transmission electron microscopy. We observe gold-nanoparticle-mediated etching of graphene flakes, often leading to hole formation. Further, using a combination of high-angle annular dark field imaging and electron energy loss spectroscopy, we highlight that the catalytic effects of gold nanoparticles on graphene lead to the formation of amorphous carbon layers. From the extracted diffractograms, we observe regions with diffraction halos as well as some regions with a weak tetrahedral motif. Using independently performed Raman measurements, we confirm the presence of tetrahedral amorphous carbon as well as mixed graphitic-amorphous regions. For the amorphous carbon regions with mixed sp²-sp³ st

SUBMITTER: Mitra S 

PROVIDER: S-EPMC11318520 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature