표면 거칠기가 나노 응착력에 미치는 영향에 관한 실험적 연구

An Experimental Study on the Effect of Surface Roughness on Nanoscale Adhesion

  • 양승호 (한국과학기술연구원 트라이볼로지 연구센터)
  • Yang Seung Ho (Tribology Research Center, Korea Institute of Science and Technology)
  • 발행 : 2005.02.01


Effect of Surface roughness on nanoscale adhesion was studied experimentally by using colloidal probe technique. Glass micro balls having the radius of $3.3\~17.4{\mu}m$ were glued at the end of AFM cantilevers to prepare colloidal probes. Adhesion force between the colloidal probe and Si-wafer was measured using pull-off force measuring method. Results showed that the measured adhesion forces are not the function of the radius of the glued balls because the ball surfaces are rough. It is also found that roughness parameters such as $R_a,\;R_q\;and\;R_{max}$ do not have important role on nanoscale adhesion. In order to find the effect of surface roughness on nanoscale adhesion, the bearing areas were extracted from the measured topography of glued balls. After normalizing the measured adhesion force with the bearing area, it was found that the normalized adhesion force kept constant as function of the radius of glued ball.


  1. Israelachvili, J.N. and Tabor, D., 'The measurement of van der Waals dispersion forces in the range 1.5 to 130 nm,' Proceedings of the Royal Society of London, Series A, Vol. 331, Issue 1584, pp. 19-38, 1972
  2. Derjaguin, B.V., Aleinikova, I.N. and Toporov, Yu. P., 'On the role of electrostatic forces in the adhesion of polymer particles to solid surfaces,' Progress in Surface Science, Vol. 45, Issues 1-4, pp. 119-123, 1994
  3. Fisher, L.R. and Israelachvili, J.N., 'Direct measurement of the effect of meniscus forces on adhesion: A study of the applicability of macroscopic thermodynamics to microscopic liquid interfaces,' Colloids and Surfaces, Vol. 3, Issue 4, pp. 303-319, 1981
  4. Podczeck F., Newton, J.M. and James, M.B, 'Adhesion and friction between powders and polymer or aluminium surfaces determined by a centrifuge technique,' Powder Technology, Vol. 83, pp. 201-209, 1995
  5. Drummond, C. and Israelachvili, J., 'Surface forces and wettability,' Journal of Petroleum Science and Engineering, Vol. 33, Issues 1-3, pp. 123-133, 2002
  6. Mugele, F., Becker, T., Klingner, A. and Salmeron, M., 'Two-dimensional observation of drainage and layering transitions in confined liquids,' Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 206, Issues 1-3, pp. 105-113, 2002
  7. Atkins, D., Kekicheff, P. and Spalla, O., 'Adhesion between Colloidal Silica as Seen with Direct Force Measurement,' Journal of Colloid and Interface Science, Vol. 188, Issue 1, pp. 234-237, 1997
  8. Bhushan, B., 'Nanoscale tribophysics and tribomechanics,' Wear, Vol. 225-229, Part 1, pp. 465-492, 1999
  9. Giesbers, M., Kleijn, J.M. Fleer, G. J. and Cohen Stuart, M. A., 'Forces between polymer-covered surfaces: a colloidal probe study,' Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 142, Issues 2-3, pp. 343-353, 1998
  10. Cleveland, J. and Manne, S., 'A nondestructive method for determining the spring constant of cantilevers for scanning force microscopy,' Rev. Sci. Instrum., Vol. 64, No. 2, pp. 403-405, 1993
  11. Bradley, R.S., 'The cohesive force between solid furfaces and the surface energy of solids,' Phil. Mag., Vol. 13, pp. 853-862, 1932
  12. Johnson, K.L., Kendall, K. and Roberts, A.D., 'Surface energy and the contact of elastic solids,' Proc. R. Soc., London, Ser. A, Vol. 324, pp. 301-313, 1971
  13. Derjaguin, B.V., Muller, V.M. and Toporov, Y.P., 'Effect of contact deformations on the adhesion of particles,' J. Coll. Interface Sci., Vol. 67, pp. 314-326, 1975
  14. Abbot, E.J and Firestone, F.A., 'Specifying surface quality,' Mech. Eng., Vol. 55, pp. 569-572, 1993