Fabrication and Tribological Characterization of Deformation-resistant Nano-textured Surfaces Produced by Two-photon Lithography and Atomic Layer Deposition
surface texturing, core-shell nanostructures, two-photon lithography, atomic layer deposition
In this study, we demonstrated a novel strategy for fabricating deformation-resistant nano-textured surfaces. Ordered arrays of IP-DIP photoresist nanodots of various diameters were first fabricated using two-photon lithography. IP-DIP/Al2O3 core-shell nanostructures (CSNs) were then formed by conformally coating the nanodots with Al2O3 of different thicknesses via atomic layer deposition (ALD). The CSNs showed 85% lower coefficients of friction than the bare IP-DIP nanodots and exhibited minimal nanostructure deformation at contact pressures greater than 20 GPa. The IP-DIP/Al2O3 CSNs also have lower adhesion forces than the bare IP-DIP nanodots. The excellent deformation resistance and superior tribological properties of these CSNs demonstrate that the combination of two-photon lithography and ALD is a very promising solution to tribological issues in miniaturized systems.
Steck, J. G., Afsher Mohajer, M., Sun, Q., Meng, X., & Zou, M. (2018). Fabrication and Tribological Characterization of Deformation-resistant Nano-textured Surfaces Produced by Two-photon Lithography and Atomic Layer Deposition. Mechanical Engineering Faculty Publications and Presentations., 132, 75-84. https://doi.org/https://doi.org/10.1016/j.triboint.2018.12.012