Cylindrical molecular brushes under poor solvent conditions: microscopic observation and scaling analysis.
Axial contraction of cylindrical molecular brushes of polymethylmethacrylate was observed by static light scattering and scanning force microscopy. Single brush molecules were visualized as worm-like particles whose length was almost three times shorter than the contour length of the backbone. A somewhat larger length was measured by light scattering in a good solvent. A scaling approach has been used to analyze the driving forces for the axial contraction and the conformation of the molecular brushes.
Sheiko
S S
SS
Organische Chemie III, Universität Ulm, 89069 Ulm, Germany.
Borisov
O V
OV
Prokhorova
S A
SA
Möller
M
M
D000327:Adsorption; D000538:Aluminum Silicates / Q000737:chemistry; D002725:Chloroform / Q000737:chemistry; D008027:Light; D046911:Macromolecular Substances; D008280:Magnetics; D018625:Microscopy, Atomic Force / Q000379:methods*; D015233:Models, Statistical; D011108:Polymers / Q000737:chemistry; D019904:Polymethyl Methacrylate / Q000737:chemistry; D012542:Scattering, Radiation; D012997:Solvents; D013816:Thermodynamics
D000538:Aluminum Silicates; D046911:Macromolecular Substances; D011108:Polymers; D012997:Solvents; D002725:Chloroform; D019904:Polymethyl Methacrylate; C011934:mica