  Carbon fibers, especially those constructed from carbon nanotubes (CNTs),
have attracted intensive interests from both scientific and engineering
communities due to their outstanding physical properties. In this workHere we
report, we find that the recently synthesized recently synthesized ultrathin
diamond nanothread (DNT) not only possesses excellent torsional deformation
capability, but also has excellent interfacial load transfer efficiency.
Comparing with the (10,10) carbon nanotube bundles, (1) By considering a seven
strand fiber, the flattening of nanotubes as observed in (10,10) CNT bundles is
not observed in DNTdiamond nanothread bundle, which . This endows the DNT
bundle withleads to a high torsional elastic limit that is almost three times
higherfour times as obtained from the (10,10) CNT bundle. Pull-out tests reveal
that (2) Pull-out tests reveal that tthe DNT diamond nanothread bundle has has
an interface transfer load of more than twice that of the CNT carbon naontube
bundle, corresponding to an order of magnitude higher in terms of . (3) Tthe
interfacial shear strength of the DNT bundle is an order of magnitude higher
than that of the CNT bundle. Such high interface load transfer efficiency is
attributed to the zigzag morphology of DNT, which introduces a strong
mechanical interlocking effect at the interface through the stick-slip motion
(totally different from the load transfer mechanism in CNT bundle). The
aforementioned three aspects are commonly used to gauge the performance of
fibers. Obviously,These intriguing features enable DNT diamond nanothread as
exhibits excellent potential candidate for constructing next generation carbon
fibers.
