Synthesis and surface chemistry study of a new amphiphilic PAMAM dendrimer

Guodong Sui; Miodrag Micic; Qun Huo; Roger M. Leblanc

doi:10.1021/la0005762

Synthesis and surface chemistry study of a new amphiphilic PAMAM dendrimer

Guodong Sui, Miodrag Micic, Qun Huo, Roger M. Leblanc

Chemistry

Research output: Contribution to journal › Article › peer-review

45 Scopus citations

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)
Pages (from-to)	7847-7851
Number of pages	5
Journal	Langmuir
Volume	16
Issue number	20
DOIs	https://doi.org/10.1021/la0005762
State	Published - Oct 3 2000

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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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.",

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