Formation of ordered mesoscopic polymer arrays by dewetting.

It could be shown that by a simple casting process from solution two-dimensionally ordered arrays of mesoscopic (i.e., in the range of submicrometer to micrometer) polymer aggregates on solid substrates can be formed. Patterns were investigated by optical microscopy and atomic force microscopy. The pattern formation was observed in situ by optical and fluorescence microscopy and it was found that a "fingering instability" at the three-phase-line of a solution droplet is the crucial process for pattern formation. (c) 1999 American Institute of Physics.

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

[2]  A. M. Cazabat,et al.  Spreading and Instabilities Induced by a Solutal Marangoni Effect , 1998 .

[3]  T. Ondarçuhu,et al.  Relaxation modes of the contact line of a liquid spreading on a surface , 1991, Nature.

[4]  T. Kunitake,et al.  Preparation of Langmuir-Blodgett films of azobenzene amphiphiles as polyion complexes , 1985 .

[5]  K. Winey,et al.  Unstable Polymer Bilayers. 1. Morphology of Dewetting , 1995 .

[6]  Melo,et al.  Fingering instability of spinning drops. , 1989, Physical review letters.

[7]  M. Shimomura,et al.  Aggregation of Dendrimers with a Photochromic Dithienylethene Core Group on the Mica Surface-Atomic Force Microscopic Imaging , 1998 .

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

[9]  Fluid physics : lecture notes of summer schools , 1995 .

[10]  P. Gennes,et al.  Wetting and Slippage of Polymer Melts on Semi-ideal Surfaces , 1994 .

[11]  M. Shimomura,et al.  Formation of ordered mesoscopic patterns in polymer cast films by dewetting , 1998 .

[12]  F. Heslot,et al.  Fingering instability of thin spreading films driven by temperature gradients , 1990, Nature.

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

[14]  J. Daillant,et al.  Drying of solids wetted by thin liquid films , 1990 .

[15]  Herbert E. Huppert,et al.  Flow and instability of a viscous current down a slope , 1982, Nature.

[16]  D. Quéré,et al.  Thickness and Shape of Films Driven by a Marangoni Flow , 1996 .

[17]  E. B. Dussan,et al.  The rewetting of an inclined solid surface by a liquid , 1985 .

[18]  J. Eggers.  Nonlinear dynamics and breakup of free-surface flows , 1997 .

[19]  S. Nishimura,et al.  Mesoscopic pattern formation of nanostructured polymer assemblies , 1998 .

[20]  L. Schwartz.  Viscous flows down an inclined plane: Instability and finger formation , 1989 .

[21]  M. Shimomura.  Preparation of ultrathin polymer films based on two-dimensional molecular ordering , 1993 .

[22]  Grégoire Nicolis,et al.  Self-Organization in nonequilibrium systems , 1977 .

[23]  A. Karim,et al.  Control of Polystyrene Film Dewetting through Sulfonation and Metal Complexation , 1998 .

[24]  D. F. Evans,et al.  Nucleation and Growth of Defects Leading to Dewetting of Thin Polymer Films , 1997 .

[25]  A. Cazabat,et al.  The Thickness of Surface-Tension-Gradient-Driven Spreading Films , 1993 .

[26]  Samuel A. Safran,et al.  Fingering Instabilities of Driven Spreading Films , 1989 .

[27]  V. Ego,et al.  Tears of wine: the stationary state , 1995 .

[28]  Masatsugu Shimomura,et al.  Mesoscopic patterns of molecular aggregates on solid substrates , 1998 .

[29]  L. Scriven,et al.  The Marangoni Effects , 1960, Nature.