Oxidation of wüstite rich iron oxide nanoparticles via post-synthesis annealing
Oxidation of wüstite rich iron oxide nanoparticles via post-synthesis annealing
复制标题
通过合成后退火氧化富含方铁矿的氧化铁纳米颗粒
DOI：
10.1016/j.jmmm.2021.168405
复制
发表时间：
2021
影响因子：
2.7
通讯作者：
Mefford, O. Thompson
中科院分区：
文献类型：
--
作者：
Yan, Zichun;FitzGerald, Sara;Crawford, Thomas M.;Mefford, O. Thompson
When forming magnetic nanoparticles, the decomposition of organo-metallic precursors causes a reduction of Fe(III) to Fe(II) which leads to the formation of an antiferromagnetic rock salt phase of FeO. The antiferromagnetic phase reduces the nanoparticle magnetization, so a new method of oxidation was developed that can convert FeO rich particles to Fe3O4particles. Iron oxide nanoparticles with different sizes were synthesized to validate the oxidation method. We demonstrate that iron oxide nanoparticles can be oxidized by post synthesis annealing without addition of oxidizing agents. The oxidized particles were measured with XRD, VSM and AC calorimetry to show the effective oxidation by comparing to the as prepared sample. The resulting 20 nm oxidized particles have a saturation magnetization of 72 Am2/kg at 300 K and a specific absorption rate of 181 W/g under a 212 kHz, 33 mT AC field.
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影响因子：
17.1
作者：
Unni M;Uhl AM;Savliwala S;Savitzky BH;Dhavalikar R;Garraud N;Arnold DP;Kourkoutis LF;Andrew JS;Rinaldi C
通讯作者：
Rinaldi C
影响因子：
6.7
作者：
Lak, Aidin;Kraken, Mathias;Schilling, Meinhard
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Schilling, Meinhard
影响因子：
3.8
作者：
Cavelius, Christian;Moh, Karsten;Mathur, Sanjay
通讯作者：
Mathur, Sanjay
影响因子：
3.1
作者：
Lanier, Olivia L.;Korotych, Olena, I;Dobson, Jon
通讯作者：
Dobson, Jon
影响因子：
6.7
作者：
Hufschmid R;Arami H;Ferguson RM;Gonzales M;Teeman E;Brush LN;Browning ND;Krishnan KM
通讯作者：
Krishnan KM