Abstract
Surface nano-patterning with Ni nanodot arrays was investigated for adhesion and friction reduction of contacting interfaces. Self-assembled anodized aluminum oxide (AAO) templates in conjunction with thermal evaporation was used to fabricate nano-patterned surfaces with ordered Ni nanodot arrays on Si substrates. Surface morphology of the Ni nanodot-patterned surfaces (NDPSs) was characterized by scanning electron microscopy (SEM). Adhesion and friction studies on a Ni NDPS and a baseline smooth Si(100) surface were conducted using a TriboIndenter employing a diamond tip with 100 μm nominal radius of curvature. The results show that the ordered Ni nanodot-patterning reduced the adhesion forces and coefficients of friction up to 92 and 83%, respectively, compared to those of the smooth silicon surface. Surprisingly, the nanoscale multi-asperity contact between the diamond tip and inhomogeneous Ni NDPSs under low loads follows a continuum contact mechanics model.
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Acknowledgments
We thank the College of Engineering, the Fulbright College of Arts & Sciences, and the Department of Mechanical Engineering of the University of Arkansas for major equipment funding support and the support of the Center for Semiconductor Physics in Nanostructures (C-SPIN), a OU/UA NSF-funded MRSEC (DMR-0080054).
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Zou, M., Wang, H., Larson, P. et al. Ni nanodot-patterned surfaces for adhesion and friction reduction. Tribol Lett 24, 137–142 (2006). https://doi.org/10.1007/s11249-006-9157-x
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DOI: https://doi.org/10.1007/s11249-006-9157-x