title: Radiation-induced synthesis of gold nanoparticles within lamellar phases. Formation of aligned colloidal gold by radiolysis.
abstract: A sheared lamellar phase has been used as a nanoreactor for the synthesis of gold nanoparticles by radiolysis and by a photochemical approach. A gold salt solution (KAuCl4, 10(-2) M) is introduced into the aqueous compartments between the lipid-based bilayers. Gold nanoparticles grow within the lamellar phase as shown by TEM analysis and X-ray diffraction, limiting the particle size. Homodisperse, 2.4- and 5.9-nm-sized, spherical nanoparticles are produced by gamma irradiation and UV irradiation, respectively. When produced by radiolysis, they are perfectly aligned along the lamellae. Their UV-vis spectra display a maximum at 565 nm suggesting that nanoparticles are coupled by dipole-dipole interactions within the lamellar phase.
authors.affiliation: CRPP-CNRS, Université Bordeaux I, Avenue du Dr. Schweitzer, 33600 Pessac, France.
authors.forename: Marie-Edith
authors.initials: ME
authors.lastname: Meyre
authors.forename: Mona
authors.initials: M
authors.lastname: Tréguer-Delapierre
authors.forename: Chrystel
authors.initials: C
authors.lastname: Faure
mesh_terms: D003102:Colloids; D020285:Cryoelectron Microscopy; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D011854:Radiochemistry; D013053:Spectrophotometry
chemical_list: D003102:Colloids; D006046:Gold