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Combined Experimental and Theoretical Investigation of Heating Rate on Growth of Iron Oxide Nanoparticles
Chemistry of Materials ( IF 8.6 ) Pub Date : 2017-11-13 00:00:00 , DOI: 10.1021/acs.chemmater.7b02872
Hamed Sharifi Dehsari 1 , Maziar Heidari 1 , Anielen Halda Ribeiro 1 , Wolfgang Tremel 2 , Gerhard Jakob 3 , Davide Donadio 4 , Raffaello Potestio 1 , Kamal Asadi 1
Affiliation  

Thermal decomposition is a promising route for the synthesis of highly monodisperse magnetite nanoparticles. However, the apparent simplicity of the synthesis is counterbalanced by the complex interplay of the reagents with the reaction variables that determine the final particle size and dispersity. Here, we present a combined experimental and theoretical study on the influence of the heating rate on crystal growth, size, and monodispersity of iron oxide nanoparticles. We synthesized monodisperse nanoparticles with sizes varying from 6.3 to 27 nm simply by controlling the heating rate of the reaction. The nanoparticles show size-dependent superparamagnetic behavior. Using numerical calculations based on the classical nucleation theory and growth model, we identified the relative time scales associated with the heating rate and precursor-to-monomer (growth species) conversion rate as a decisive factor influencing the final size and dispersity of the nanoparticles.

中文翻译:

加热速率对氧化铁纳米颗粒生长的理论与实验相结合

热分解是合成高度单分散磁铁矿纳米颗粒的有前途的途径。但是,由于试剂与反应变量之间复杂的相互作用决定了合成的明显简单性,而反应变量决定了最终的粒径和分散度。在这里,我们提出了结合实验和理论研究的加热速率对氧化铁纳米颗粒的晶体生长,尺寸和单分散性的影响。我们仅通过控制反应的加热速率即可合成尺寸为6.3至27 nm的单分散纳米颗粒。纳米颗粒显示出尺寸依赖性的超顺磁性行为。使用基于经典成核理论和生长模型的数值计算,
更新日期:2017-11-14
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