Abstract
A new disk-shaped amphiphilic dendrimer has been synthesized by attaching sixty-four 12-hydroxy-dodecanoic acid chains to a fourth generation poly(amido amine) (PAMAM) dendrimer core. Surface pressure and surface potential-area isotherm measurements have shown that the dendrimer forms a stable monolayer at the air/water interface with limiting molecular area of 160 angstrom2/molecule. This small area relative to the huge size of the dendrimer suggests that the dendrimer molecules form an edge-on disk-shaped structure at the air/water interface. The topography of the dendrimer monolayer was observed by Brewster angle microscopy (BAM) at air/water interface as well as by environmental scanning electron microscopy (ESEM) as a Langmuir-Blodgett film. The striplike monolayer domains observed from BAM images correspond to the monolayer topography as observed from ESEM images.
Original language | English (US) |
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Pages (from-to) | 7847-7851 |
Number of pages | 5 |
Journal | Langmuir |
Volume | 16 |
Issue number | 20 |
DOIs | |
State | Published - Oct 3 2000 |
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry