Onion phases as biomimetic confined media for silica nanoparticle growth.
Phospholipid onion phases were investigated as biomimetic media for the synthesis of silica in a confined environment. Stable multilamellar nanovesicles incorporating sodium silicate solutions could be obtained. Upon aging, silica condensation occurs in the onion interlayer space while preserving the initial multilamellar organization. The hybrid structure consists of an array of apparently unconnected silica nanoparticles in the 20-30 A size range packed in the vesicular 50 A interlayer space, suggesting that the silica growth was efficiently controlled by its confinement in the onion lamellar organization.
El Rassy
Houssam
H
Laboratoire de Chimie de la Matière Condensée, Université Pierre et Marie Curie Paris VI, 4 place Jussieu (T54-E5), 75252 Paris Cedex 05, France. hrassy@ccr.jussieu.fr
Belamie
Emmanuel
E
Livage
Jacques
J
Coradin
Thibaud
T
D009682:Magnetic Resonance Spectroscopy / Q000379:methods / Q000592:standards; D046529:Microscopy, Electron, Transmission / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D010713:Phosphatidylcholines / Q000737:chemistry; D010743:Phospholipids / Q000737:chemistry*; D012015:Reference Standards; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000138:chemical synthesis* / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties
D010713:Phosphatidylcholines; D010743:Phospholipids; D012822:Silicon Dioxide