Sticking polydisperse hydrophobic magnetite nanoparticles to lipid membranes.
The formation of a layer of hydrophobic magnetite (Fe(3)O(4)) nanoparticles stabilized by lauric acid is analyzed by in situ X-ray reflectivity measurements. The data analysis shows that the nanoparticles partially disperse their hydrophobic coating. Consequently, a Langmuir layer was formed by lauric acid molecules that can be compressed into an untilted condensed phase. A majority of the nanoparticles are attached to the Langmuir film integrating lauric acid residue on their surface into the Langmuir film. Hence, the particles at the liquid-gas interface can be identified as so-called Janus beads, which are amphiphilic solids having two sides with different functionality.
Paulus
Michael
M
TU Dortmund, Fakultät Physik/DELTA, Maria Goeppert Mayer Strasse 2, 44227 Dortmund, Germany. michael.paulus@uni-dortmund.de
Degen
Patrick
P
Brenner
Thorsten
T
Tiemeyer
Sebastian
S
Struth
Bernd
B
Tolan
Metin
M
Rehage
Heinz
H
D000327:Adsorption; D002462:Cell Membrane / Q000737:chemistry*; D005740:Gases / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D007850:Lauric Acids / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
D005740:Gases; D007850:Lauric Acids; D058185:Magnetite Nanoparticles; D014867:Water; C030358:lauric acid