View Journal Article: Combinatorial Study of Surface Pattern Formation in Thin Block Copolymer Films
Smith, Archie, Douglas, Jack, Meredith, J. Carson, Amis, Eric and Karim, Alamgir (2001). Combinatorial Study of Surface Pattern Formation in Thin Block Copolymer Films. Physical Review Letters87 (1). .
Surface pattern formation in diblock copolymer films is investigated as a function of film thickness h and molecular mass M. Smooth films are observed for certain h ranges centered
about multiples of the lamellar thickness L0, and we attribute this effect to an increase in the surface chain density with h in the outer brushlike copolymer layer. We also observe apparently
stable labyrinthine surface patterns for other h ranges, and the average size of these patterns is found to scale as these patterns is found to scale as l L22.50. Hole and island patterns occur for
h ranges between those of the labyrinthine patterns and the smooth regions, and their size similarly decreases with L0 and M.