Self-assembling study of a cylinder-forming block copolymer via a nucleation-growth mechanism
AISSOU, Karim
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
AISSOU, Karim
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
< Réduire
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
Langue
en
Article de revue
Ce document a été publié dans
Nanotechnology. 2009, vol. 20, n° 9, p. art number 095602
Institute of Physics
Résumé en anglais
Block copolymer materials form self-assembling structures at a nanometric scale, of interest in nanotechnology. The organization process of asymmetric poly(styrene-block-methyl methacrylate) (PS-b-PMMA) copolymer thin films ...Lire la suite >
Block copolymer materials form self-assembling structures at a nanometric scale, of interest in nanotechnology. The organization process of asymmetric poly(styrene-block-methyl methacrylate) (PS-b-PMMA) copolymer thin films is studied. In a first step it is demonstrated that two consecutive mechanisms lead to the formation of a well-ordered phase. The first mechanism is the local segregation of blocks, which leads to a metastable disordered cylinder phase (C-d). The second mechanism is a transformation of the C-d phase to a vertical cylinder phase via a nucleation-growth mechanism. The influence of film thickness and surface tension on the organization is also studied. Above the natural cylinder monolayer height, h(1), the kinetics of the cylinder organization strongly depends on the initial film thickness, and below h(1) the film splits into terraces. By varying the interactions between the substrate surface and the different blocks, a disordered phase can be formed instead of terraces.< Réduire
Mots clés en anglais
POLYSTYRENE
POLYISOPRENE
HEX-CYLINDER
ASYMMETRIC DIBLOCK COPOLYMERS
ORDER-DISORDER TRANSITION
ATOMIC-FORCE MICROSCOPY
THIN-FILMS
MICROPHASE SEPARATION
PHASE-BEHAVIOR
MORPHOLOGY
Origine
Importé de halUnités de recherche