**4. Conclusions**

In conclusion, we have investigated the different types of deformations such, as screw distortion, XY-distortion, and Z-distortion in both carbon nanotubes and boron nitride nanotubes of 100 Å in length with chirality (6,6).

The effects of these deformations on both the nanotubes (BNNT and CNT) are quite similar. The formation of the more bonded system due to the increase in hydrogen bonds inside the nanotube decreases the diffusion of water through them. This is similar to the results reported by Mendonca et al. [28]. As Feng et al. [6] reported for the diffusion of helium gas through deformed nanotubes, the screw distortion did not have any significant impact on water transport, but the impact of the XY-distortion and Z-distortion were quite significant. The XY-deformation of higher value had a compelling negative effect on water transport, while the XY-distorted nanotubes of value 2 showed encouraging effects on water transport through the nanotubes. These results point to the importance of nanotube structure on water transport phenomena.

Further studies could be carried out for the XY-distortion of values less than 2 and for values slightly higher than 2 for optimizing the value which supports better water transport. These studies can also help to design better transmembrane channels and other relative nanodevices.

**Author Contributions:** Conceptualization, F.R.; methodology, F.R.; software, F.R.; validation, F.R., M.S. and D.K.; formal analysis, F.R.; investigation, D.K. and M.S.; resources, D.K.; data curation, F.R.; writing—original draft preparation, F.R.; writing—review and editing, M.S. and D.K.; visualization, F.R.; supervision, D.K. and M.S.; project administration, D.K. and M.S.; funding acquisition, D.K.

**Funding:** This research received no external funding.

**Conflicts of Interest:** The authors declare no conflict of interest.
