메뉴 건너뛰기




Volumn 18, Issue 25, 2002, Pages 9792-9798

Laser-induced Marangoni convection in the presence of surfactant monolayers

Author keywords

[No Author keywords available]

Indexed keywords

DIFFRACTION; ETHYLENE; GLYCOLS; LASER BEAM EFFECTS; LIGHT MODULATION; MONOLAYERS; PHASE TRANSITIONS; REFRACTIVE INDEX; SOLUTIONS; SURFACE ACTIVE AGENTS; SURFACE TENSION; WATER;

EID: 0037059201     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la020508a     Document Type: Article
Times cited : (41)

References (42)
  • 1
    • 0004012624 scopus 로고
    • Prentice Hall: Englewood Cliffs, NJ
    • Levich, V. G. In Physicochemical Hydrodynamics, Prentice Hall: Englewood Cliffs, NJ, 1962; pp. 384-390.
    • (1962) Physicochemical Hydrodynamics , pp. 384-390
    • Levich, V.G.1
  • 3
    • 0001569395 scopus 로고
    • Block, M. J. Nature 1956, 178, 650-651.
    • (1956) Nature , vol.178 , pp. 650-651
    • Block, M.J.1
  • 7
    • 0032902344 scopus 로고    scopus 로고
    • Grunze, M. Science 1999, 283, 41-42.
    • (1999) Science , vol.283 , pp. 41-42
    • Grunze, M.1
  • 27
    • 0012327599 scopus 로고    scopus 로고
    • note
    • Water presented a behavior different from that observed with ethylene glycol. The surface of water solutions acted as a convex mirror, defocusing the reflected beam and indicating the formation of a "bump" on the surface instead of a depression. Such behavior suggests that density gradients are the dominant effect in this case. However, for thin layers of liquids with low viscosity, a vigorous Marangoni convection can lead to the reflection of a mass of liquid on the bottom of the recipient, which returns upward producing dilation of the surface. A similar phenomenon was observed in experiments on simulated weld pools developed by another group (see ref 17). In our laboratory, the same anomalous behavior was observed with solutions of ethanol and and acetone and with ethylene glycol after addition of a certain amount of water. This phenomenon cannot be completely explained from the results presented here and demands a separate investigation, which is now under progress.
  • 32
    • 0012269436 scopus 로고    scopus 로고
    • note
    • The surface flattening due to the back-spreading pressure of the monolayer can occur even in the case of the formation of a bump on the surface driven by density gradients. The direction of the liquid flow will be opposite to that observed when surface tension is the driving force for convection. However, the monolayer will also move on the surface in this case, generating an opposite surface tension gradient and causing the attenuation of the surface deformation. Thus, even when density gradients generate the convection, the suppression of the signal by a monolayer is likely to occur.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.