Growing onions: Formation of onion-type MoS2 fullerenes was monitored by taking TEM snapshots of reaction intermediates in the thermal decomposition of amorphous precursor particles, which led first to giant multiwall fullerenes (d>150 nm) in which, at higher temperature, smaller daughter fullerenes segregated (see TEM image). Subsequently, tubular nanopods, containing fullerene particles and finally twinned and nested fullerenes, were formed.
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