The macroscopic forms of interfaces in condensed matter systems are often determined by microscopic effects (such as crystalline anisotropy, the binding energy of atoms to the surface, or random pinning of the interface by inhomogeneities). Therefore, studies of interfacial shapes can lead to fundamental insights. This project is especially concerned with interfaces in non- equilibirum systems. It is intended to establish (a) the degree to which proven concepts developed for equilibrium systems are useful in understanding those driven away from equilibrium and (b) the degree to which a macroscopic continuum explanation of interfacial patterns is possible. Three major areas of investigation are planned: (1) the kinetic roughening of faceted crystals, in which crystal shapes become rounded during growth; (2) the growth of dendritic crystals (snowflake-like structures) and other complex interfaces, especially the role of crystalline anistropy and the development of complex patterns; and (3) the form and dynamics of a fluid interface moving in a random porous medium. The experiments will utilize high precision digital image processing methods developed at Haverford during the previous grant period. This RUI project will employ collaborations between graduate and undergraduate students, both to enhance the effectiveness of undergraduate research and to help address the severe shortage of capable researchers interested in undergraduate education.

Agency
National Science Foundation (NSF)
Institute
Division of Materials Research (DMR)
Application #
8901869
Program Officer
H. Hollis Wickman
Project Start
Project End
Budget Start
1989-08-15
Budget End
1994-01-31
Support Year
Fiscal Year
1989
Total Cost
$253,300
Indirect Cost
Name
Haverford College
Department
Type
DUNS #
City
Haverford
State
PA
Country
United States
Zip Code
19041