Highly anisotropic distribution of iron nanoparticles within MCM-41 Mesoporous Silica.
Electron microscopy techniques are used to visualize the spatial distribution of iron nanoparticles inside a mesoporous MCM-41 molecular sieve. Direct observation of the iron oxide nanoparticles by STEM-HAADF imaging reveals a highly non-uniform spatial distribution inside the mesopores. These particles are retained in the pores after a reduction treatment unlike the behavior found in other similar systems. It is found that thermal treatments induce changes in its morphology, creating nanowires from particle strings.
Moreno
M Sergio
MS
Materials Department, Centro Atómico Bariloche, 8400 San Carlos de Bariloche, Argentina. smoreno@cab.cnea.gov.ar
Weyland
Matthew
M
Midgley
Paul A
PA
Bengoa
José F
JF
Cagnoli
Marta V
MV
Gallegos
Norma G
NG
Alvarez
Ana M
AM
Marchetti
Sergio G
SG
D007091:Image Processing, Computer-Assisted / Q000379:methods; D007501:Iron / Q000032:analysis* / Q000737:chemistry; D008854:Microscopy, Electron / Q000379:methods; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D012822:Silicon Dioxide / Q000737:chemistry*
D012822:Silicon Dioxide; D007501:Iron