single-walled carbon-nanotube

Single-walled carbon nanotubes (SWNTs) possess superior
electronic and physical properties that make them ideal
candidates for making next-generation electronic circuits that
break the size limitation of current silicon-based technology14.
The first critical step in making a full SWNT electronic circuit is
to make SWNT intramolecular junctions in a controlled manner.
Although SWNT intramolecular junctions have been grown
by several methods2,58, they only grew inadvertently in most
cases. Here, we report well-controlled temperature-mediated
growth of intramolecular junctions in SWNTs. Specifically, by
changing the temperature during growth, we found that SWNTs
systematically form intramolecular junctions. This was achieved
by a consistent variation in the SWNT diameter and chirality
with changing growth temperature even though the catalyst
particles remained the same. These findings provide a potential
approach for growing SWNT intramolecular junctions at desired
locations, sizes and orientations,which are important for making
SWNT electronic circuits. 拉曼光谱仪