By Kash L. Mittal, J. Drelich, Laskowski
This publication chronicles the court cases of the overseas Symposium on obvious and Microscopic touch Angles, held at the side of the yank Chemical Society assembly in Boston, August 24-27, 1998. The ebook is split into 4 elements: Nanoscopic and Molecular results on touch Angles; floor Forces and floor loose power; Wetting of Heterogeneous, tough and Curved Surfaces; Dynamic results in touch attitude Measurements. one of the issues coated are: touch line rigidity size; liquid drop floor topography; molecular mechanisms of hydrophobic transitions; stereochemical and conformational features of polymer surfaces; choice of acid-base houses of steel oxides and polymers through touch perspective dimension; van Oss--Good concept of acid-base floor unfastened energies; AFM dimension of forces; skinny liquid motion pictures; wettability of flat and curved surfaces; touch perspective hysteresis; elements affecting touch perspective meassurements; dynamic wetting habit; and impact of surfactants on wetting.
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This publication chronicles the complaints of the foreign Symposium on obvious and Microscopic touch Angles, held along side the yankee Chemical Society assembly in Boston, August 24-27, 1998. The booklet is split into 4 elements: Nanoscopic and Molecular results on touch Angles; floor Forces and floor unfastened strength; Wetting of Heterogeneous, tough and Curved Surfaces; Dynamic results involved attitude Measurements.
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Additional info for Apparent and Microscopic Contact Angles
Time relationships for this system compared with the previously discussed systems. First of all, already after several minutes, we reported a significant variation in the advancing contact angle (Fig. 8). Also, it was quite common that the receding contact angle decreased slightly at the beginning of the experiment instead of increasing (Fig. 8). If the 'final' contact angle value was approached by the relaxing advancing and receding contact angles, it was smaller than the receding contact angle (measured at the beginning of the experiment) (Fig.
We believe that the mechanisms that are important in the analysis of the contact angle data in Figs 1,2, and 4- 8 are (i) pinning of the three-phase contact line during its receding and advancing, and its slow evolution to a more stable configuration; (ii) nucleation/ condensation of liquid microdroplets in the vicinity of the three-phase contact line and their coalescence with the bubble base; (iii) deformation of the solid at the contact line; and (iv) chemical changes in the system. The following is a brief (and general) discussion of mechanisms (i)-(iii).
Orr, L. E. Scriven and A. P. Rivas, J. Fluid Meck. 67, 723-742 (1975). 33. R. Sherman, D. Hirt and R. Vane, J. Sci. Technol. A 12, 1876- 1881 (1994). 34. R. Sherman and P. Adams, Precision Cleaning '96 Proceedings, pp. 290-303 (1996). 35. J. Boneberg, F. Burmeister, C. Schaefle, P. Leiderer, D. Reim, A. Fery and S. Herminghaus, Langmuir 13,7080-7084 (1997). 36. M. Wendel, H. Lorenz and J. P. Kotthaus, Appl. Phys. Lett. 67, 3732 (1995). 37. M. Wendel, B. Irmer, J. Cortes, J. P. Kotthaus, A. Lorke and E.
Apparent and Microscopic Contact Angles by Kash L. Mittal, J. Drelich, Laskowski