Amphiphilic treelike rods at interfaces: layered stems and circular aggregation.
Amphiphilic dendron-rod molecules with three hydrophilic poly(ethylene oxide) (PEO) branches attached to a hydrophobic octa-p-phenylene rod stem were investigated for their ability to form two-dimensional micellar structures on a solid surface. A treelike shape of the molecules was reported to be a major factor in the formation of nonplanar micellar structures in solution and in the bulk state (cylindrical and spherical). We observed that in these treelike amphiphilic molecules the hydrophilic terminated dendron branches assemble themselves in surface monolayers with the formation of two-dimensional layered or circular micellar structures. We suggested the formation of the planar ribbon-like structures with interdigitated layering within the loosely packed monolayers and circular, ringlike structures (2D circular aggregates) in the precollapsed state.
Holzmueller
Jason
J
Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA.
Genson
Kirsten L
KL
Park
Yushin
Y
Yoo
Yong-Sik
YS
Park
Myoung-Hwan
MH
Lee
Myongsoo
M
Tsukruk
Vladimir
V