Core-corona structures of poly(ethyleneoxide)/polybutadiene (PEO/PB) block copolymer micelles are directly resolved for the first time by examining rapidly vitrified samples by transmission electron microscopy at liquid nitrogen temperature (Cryo-TEM). Spherical micelles form at higher PEO/PB block volume ratio; cylindrical form at lower block volume ratio. Images of both shapes of micelles show a dense core and a diffuse corona. The core and corona sizes agree well with theoretical prediction from the "star" model of polymer micelles.
|Original language||English (US)|
|Number of pages||2|
|Journal||Journal of Physical Chemistry B|
|State||Published - Nov 25 1999|