By Roland Bennewitz (auth.), Dr. Enrico Gnecco, Professor Dr. Ernst Meyer (eds.)
ISBN-10: 354036806X
ISBN-13: 9783540368069
ISBN-10: 3540368078
ISBN-13: 9783540368076
In the past 20 years, strong tools such as atomic strength microscopy have made it attainable to effectively examine the phenomena of friction and put on, right down to the nanometer scale. Readers of this publication becomes acquainted with the recommendations and strategies of nanotribology, defined via a global crew of scientists and engineers, actively concerned and with lengthy experience in this box. Edited by way of pioneers within the box, 'Fundamentals of Frictions and put on on the Nanoscale' is appropriate either as first advent to this attention-grabbing topic, and likewise as a reference for researchers wishing to enhance their knowledge of nanotribology and to maintain with the newest leads to this field.
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Instrum. 74(6), 3067–3072 (2003) 72. , Lin, Z. , Langmuir 21(13), 5685–5688 (2005) 73. , Lin, Z. , Macromolecules 38(22), 9275–9279 (2005) 74. , Phys. Rev. E 65, 026119 (2002) 75. , Europhys. Lett. 55(5), 653–659 (2001) 76. ; Alcantar, N. ; Israelachvili, J. , J. Phys. Chem. B 107(40), 11149–57(2003) 77. N. , Biochemistry 31(6), 1794–1805 (1992) 2 Surface Forces Apparatus in Nanotribology 33 78. , J. Phys. Chem. B 102(1), 234–244 (1988) 79. , Curr. Opin. Colloid Interface Sci 5(1–2), 88–94 (2000) 80.
As an example, for Kr vapor pressures below 1 Torr, the two approaches yield essentially the same results, while for pressures above 10 Torr this discrepancy can be as high as 15% or more, depending on the amount of sliding observed. 3 QCM driving circuits As we have already mentioned, in order to use the quartz crystal as a nanotribology sensor it is necessary to measure its resonance frequency and its quality factor very accurately. Close to resonance, an AT-plate can in fact be accurately described [10] by the equivalent circuit shown in the enlargement of Fig.
These can be univocally determined by imposing the following boundary conditions on the velocity fields vf and vv : a) vv = 0 very far from the film; b) vv = vf at the film-vapor interface (i. e. no slippage at this boundary); c) at this interface, the force exerted by the vapor on the film must be equal to that dvf v caused by the film on the vapor, that is ηv dv dz z=d = −ηf dz z=d ; d) we assume, in general, that there may be slippage at the solid-film interface. Because of this, there will be a frictional force Fsf at this boundary.
Fundamentals of Friction and Wear by Roland Bennewitz (auth.), Dr. Enrico Gnecco, Professor Dr. Ernst Meyer (eds.)
by James
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