Ultralong HSiNWs were obtained when the solvent was
changed to 1-pentanol, as shown in Figure 1C,D. The
nanowires have a typical length of up to tens of micrometers
and a diameter ranging from 60 to 100 nm. The hollow
structures can be clearly observed either from the TEM (Figure
1C) or some broken HSiNWs in the SEM image (Figure 1D,red arrows). It is also worth noting that the HSiNWs can bend
dramatically without breaking into small pieces, showing their
excellent flexibility