Formation and in situ sizing of gamma-Fe2O3 nanoparticles in a microwave flow reactor.
Formation and in situ sizing of gamma-Fe2O3 nanoparticles in a microwave flow reactor.
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微波流反应器中 γ-Fe2O3 纳米粒子的形成和原位尺寸测定。
DOI：
10.1166/jnn.2001.032
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发表时间：
2001
影响因子：
--
通讯作者：
P. Roth
中科院分区：
文献类型：
--
作者：
C. Janzen;H. Wiggers;J. Knipping;P. Roth
在微波流动反应器中制备了纳米晶γ-Fe 2 O3颗粒。五羰基铁[Fe（CO）5]与等离子体气体Ar/O2的反应，以形成纳米尺寸的颗粒，随后通过原位粒子质谱。粒子质谱仪将非侵入式采样技术与免校准质量测定相结合。研究了微波功率、前驱体浓度、压力等工艺参数对产物粒径的影响。结果表明，平均粒径在4-5 nm的范围内，与工艺参数有轻微的依赖性。测量的粒度分布的几何标准偏差始终在1.1和1.2之间。
Nanocrystalline gamma-Fe2O3 particles were produced in a microwave flow reactor. The reaction of iron pentacarbonyl [Fe(CO)5] with the plasma gases Ar/O2 to form nanosized particles was followed by in situ particle mass spectrometry. The particle mass spectrometer combines a nonintrusive sampling technique with a calibration-free mass determination. The influence of process parameters like microwave power, precursor concentration, and pressure on the particle size was studied. The results reveal a mean particle diameter in the range of 4-5 nm with a slight dependence on the process parameter. The geometric standard deviation of the measured size distribution was always between 1.1 and 1.2.