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Ionic desorption in PMMA-gamma-Fe2O3 hybrid materials induced by fast electrons: an experimental and theoretical
Marcus V J Rocha1, Hudson W P Carvalho, Lívia C T Lacerda
1Department of Chemistry, Federal University of Lavras, 37200-000 Lavras, Minas Gerais, Brazil.
Abstract:
Poly(methylmetacrilate)-maghemite (PMMA-gamma-Fe2O3) hybrid material was studied by the electron stimulated ion desorption (ESID) techniques coupled with time-of-flight mass spectrometry (TOF-MS) and theoretical investigation about its fragmentation. Moreover, atomic force microscopy was utilized to characterize the morphology before and after ionic desorption. ESID results indicated differences of pattern fragmentation for different compositions of hybrid material in comparison with neat PMMA. Theoretical studies suggest that kinetics effects can take place in the fragmentation process and electrostatic contributions were important in the stabilization of PMMA on maghemite after the grafting process.
