We observed that the average diameter range of the ZnO nanowires of the unirradiated samples is 30 nm, and gradually decreases to an average diameter of 25 nm after increasing the ion beam irradiation dose. Is this due to the bending and curved nanowire cluster defects formed by the heavy ion beam, or the density of ZnO nanowires really decreases due to the direct effect of ion beam irradiation.
Very interesting question..
You can bend or weld nanowires (NWs), and nanotubes are vulnerable to heavy ion beam irradiation. Energetic ion beams collide with NWs and cause defects due to formation of displacement collisions and collision cascade effects, resulting in irradiation defects on NWs.The occurance of higher defects leads to an increase in disorder.
As for the density of nanowires, it is a little difficult to reduce. You can only increase or decrease the density of nanowires by changing the concentration used during their growth process.
Yes, it may possible to reduce the density by using ion irradiation...
For more details, you may go through this link, may it helps
https://pubs.rsc.org/en/content/articlelanding/2017/ra/c7ra01809f#!divAbstract
It's depend on ion energy and ion current density. If you have a few keV ions with high enough ion fluence you should observe the ion sputtering effect - removing of atoms from the surface of the wires. The sputter yield of ZnO is quit high and can reach 10 atoms per ion. You can use SRIM for simulation of the sputter yield for your experimental conditions (www.srim.org).
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