TY - JOUR
T1 - Two-dimensional observation of drainage and layering transitions in confined liquids
AU - Mugele, Friedrich Gunther
AU - Becker, T.
AU - Klingner, A.
AU - Salmeron, M.
PY - 2002
Y1 - 2002
N2 - We used a surface forces apparatus (SFA) to investigate the drainage of thin films of undecanol from a pore consisting of two atomically smooth mica sheets. Time-resolved images of the contact area during drainage show an initial elastohydrodynamic deformation of the substrates. In the late stage, the expulsion of a molecularly thin layer of alcohol is imaged in two dimensions. We analyze the dynamics of the expulsion process and discuss the physical mechanisms in terms of a model that includes the hydrodynamic flow in the two-dimensional liquid layer and the elastic properties of the substrates. We also discuss the optical resolution required to observe layering transitions in two dimensions and present a new design of a SFA optimized for these purposes.
AB - We used a surface forces apparatus (SFA) to investigate the drainage of thin films of undecanol from a pore consisting of two atomically smooth mica sheets. Time-resolved images of the contact area during drainage show an initial elastohydrodynamic deformation of the substrates. In the late stage, the expulsion of a molecularly thin layer of alcohol is imaged in two dimensions. We analyze the dynamics of the expulsion process and discuss the physical mechanisms in terms of a model that includes the hydrodynamic flow in the two-dimensional liquid layer and the elastic properties of the substrates. We also discuss the optical resolution required to observe layering transitions in two dimensions and present a new design of a SFA optimized for these purposes.
KW - IR-57260
U2 - 10.1016/S0927-7757(02)00083-3
DO - 10.1016/S0927-7757(02)00083-3
M3 - Article
VL - 206
SP - 105
EP - 113
JO - Colloids and surfaces A: Physicochemical and engineering aspects
JF - Colloids and surfaces A: Physicochemical and engineering aspects
SN - 0927-7757
IS - 1-3
ER -