Solvent-driven dewetting and rim instability.

An experimental method suitable for reproducible results has been used to investigate dewetting behavior of thin films of solvent-laden polymer. This solvent-driven dewetting enables one to change spreading coefficient by an order of magnitude that is not readily realizable in thermal dewetting and to study polar interactions that have not been fully exploited experimentally. While the film instability is similar to that found in thermal dewetting, the rim instability is quite different. Two different types of the rim instability have been found. With a polar solvent, the rim instability changes from one type to another with increasing film thickness whereas the unstable rim becomes stable for an apolar solvent.

[1]  Ashutosh Sharma,et al.  Instability of thin liquid films by density variations: a new mechanism that mimics spinodal dewetting. , 2002, Physical review letters.

[2]  Brochard-Wyart,et al.  Dynamics of dewetting. , 1991, Physical review letters.

[3]  Ashutosh Sharma,et al.  Pattern formation in unstable thin liquid films under the influence of antagonistic short- and long-range forces , 1999 .

[4]  Ashutosh Sharma,et al.  PATTERN FORMATION IN UNSTABLE THIN LIQUID FILMS , 1998 .

[5]  B. Jérôme,et al.  Dewetting Induced by Density Fluctuations , 2002 .

[6]  Ashutosh Sharma,et al.  Stability of thin polar films on non-wettable substrates , 1994 .

[7]  Robert Weiss,et al.  Spinodal Dewetting of Thin Polymer Films , 1998 .

[8]  R Seemann,et al.  Dewetting patterns and molecular forces: a reconciliation. , 2001, Physical review letters.

[9]  Ashutosh Sharma,et al.  Nonlinear stability, rupture, and morphological phase separation of thin fluid films on apolar and polar substrates , 1993 .

[10]  E. Knobloch,et al.  Front and back instability of a liquid film on a slightly inclined plate , 2003 .

[11]  A. V. Lyushnin,et al.  Fingering instability of thin evaporating liquid films. , 2002, Physical review. E, Statistical, nonlinear, and soft matter physics.

[12]  K. Terao,et al.  Solution Properties of Polymacromonomers Consisting of Polystyrene. 3. Viscosity Behavior in Cyclohexane and Toluene , 1999 .

[13]  Sharma,et al.  Meniscus instability in a thin elastic film , 2000, Physical review letters.

[14]  S. Bankoff,et al.  Long-scale evolution of thin liquid films , 1997 .

[15]  G. Reiter.  Unstable thin polymer films: rupture and dewetting processes , 1993 .

[16]  Pattern formation in drying water films , 1998 .

[17]  Ashutosh Sharma,et al.  Thin film instability induced by long-range forces , 1999 .

[18]  W. Pompe,et al.  Dewetting of an Evaporating Thin Liquid Film: Heterogeneous Nucleation and Surface Instability , 1998 .

[19]  M. Velarde,et al.  Dewetting: film rupture by nucleation in the spinodal regime. , 2001, Physical review letters.

[20]  J. Schultz,et al.  Deformation of a glassy polymer film by long-range intermolecular forces , 1998 .

[21]  F. Brochard-Wyart,et al.  Dynamics of liquid rim instabilities , 1992 .

[22]  Ashutosh Sharma,et al.  Instability of thin polymer films on coated substrates : Rupture, dewetting, and drop formation , 1996 .

[23]  T. Aminabhavi,et al.  Density, Viscosity, Refractive Index, and Speed of Sound of Ternary Systems: Polystyrene in 1,4-Dioxane + Tetrahydrofuran Mixtures at (298.15, 303.15, and 308.15) K , 2000 .

[24]  D. Gallez,et al.  Pattern formation in thin liquid films with insoluble surfactants , 1998 .

[25]  A. Sharma,et al.  Auto-optimization of dewetting rates by rim instabilities in slipping polymer films. , 2001, Physical review letters.

[26]  P. Green,et al.  Dewetting instabilities in thin block copolymer films: nucleation and growth , 1999 .

[27]  P. Gennes.  Wetting: statics and dynamics , 1985 .

[28]  Shull,et al.  Fingering instabilities of confined elastic layers in tension , 2000, Physical review letters.

[29]  Ashutosh Sharma,et al.  Instability and Dewetting of Thin Films Induced by Density Variations , 2002 .

[30]  P. Green,et al.  Hole formation in thin polymer films: a two-stage process. , 2002, Physical review letters.

[31]  S. Perry,et al.  HOW DISJOINING PRESSURE DRIVES THE DEWETTING OF A POLYMER FILM ON A SILICON SURFACE , 1999 .

[32]  H. H. Lee,et al.  Short- and Long-Range Interactions in Thin Films of Polymer Blends in Microchannels , 2002 .

[33]  R. C. Weast.  CRC Handbook of Chemistry and Physics , 1973 .

[34]  Ashutosh Sharma.  Relationship of thin film stability and morphology to macroscopic parameters of wetting in the apolar and polar systems , 1993 .

[35]  Elbaum,et al.  How does a thin wetted film dry up? , 1994, Physical review letters.

[36]  Eric J. Amis,et al.  Combinatorial Materials Science for Polymer Thin-Film Dewetting , 2000 .