Department of Chemistry, Federal University of Lavras, 37200-000 Lavras, Minas Gerais, Brazil.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Jan 3;117:276-83. doi: 10.1016/j.saa.2013.08.029. Epub 2013 Aug 13.
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.
聚（甲基丙烯酸甲酯）-磁赤铁矿（PMMA-γ-Fe2O3）杂化材料通过电子刺激离子解吸（ESID）技术与飞行时间质谱（TOF-MS）相结合进行研究，并对其碎片化进行了理论研究。此外，原子力显微镜用于在离子解吸前后对形貌进行表征。ESID 结果表明，与纯 PMMA 相比，杂化材料的不同组成在图案碎片化方面存在差异。理论研究表明，在碎片化过程中可能会发生动力学效应，并且静电贡献在接枝过程后 PMMA 在磁赤铁矿上的稳定化中很重要。
