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Dynamic Behavior of Nano-Particles on Bubble Interface

[+] Author Affiliations
K. J. Zhang, X. F. Peng

Tsinghua University, Beijing, China

Paper No. MNHT2008-52138, pp. 529-537; 9 pages
doi:10.1115/MNHT2008-52138
From:
  • ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer
  • ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B
  • Tainan, Taiwan, June 6–9, 2008
  • Conference Sponsors: Nanotechnology Institute
  • ISBN: 0-7918-4292-4 | eISBN: 0-7918-3813-7
  • Copyright © 2008 by ASME

abstract

The dynamic behavior of particles on a bubble interface contains axial and radial motions and is highly dependent upon the energy of this system. By introducing the concept of particle energy density (the average of the system energy based on particle number), four kinds of energy elements are estimated as critical elements, namely surface energy, line tension (an additive interaction at the contact line), electrostatic interaction and hydrophobic interaction (only for hydrophobic particle whose contact angle is greater than 64°). With consideration of different energy influences, the radial motion, vertical to bubble interface, and circumferential motion, parallel with bubble interface, are theoretically described and discussed.

Copyright © 2008 by ASME

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