Nanoparticles by Decomposition of Long Chain Iron Carboxylates: From Spheres to Stars and Cubes
Nanoparticles by Decomposition of Long Chain Iron Carboxylates: From Spheres to Stars and Cubes
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DOI：
10.1021/la104686d
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发表时间：
2011-03-15
期刊：
影响因子：
3.9
通讯作者：
Karty, Jonathan A.
中科院分区：
文献类型：
--
作者：
Bronstein, Lyudmila M.;Atkinson, Jessie E.;Karty, Jonathan A.
在本文中，我们报告的影响，反应条件和链长的纳米粒子（NP）的尺寸和形态的热分解的长链铁羧酸盐，如铁（III）油酸盐，棕榈酸盐，肉豆蔻酸盐。在大多数情况下，获得球形纳米粒子，然而，在一些“极端”条件下观察到非球形形态。例如，氧化铁纳米星在油酸铁/油酸比为0.49 g/mL的二十烷中形成：当NP仍然形成时，油酸含量最高。在最低的棕榈酸分数下通过棕榈酸铁的分解获得具有平坦小面的立方体NP，但是在棕榈酸铁/棕榈酸比为1.19 g/mL时形成最单分散的立方体。椭圆形NP由具有最明确结构的肉豆蔻酸铁形成。这些纳米颗粒从浮氏体到磁赤铁矿的容易转化，而不聚集和溶解度损失，使得它们在我们之前的论文中描述的适当官能化后成为生物医学应用的优秀候选物。
In this paper, we report the influence of reaction conditions and the chain length on the nanoparticle (NP) size and morphology for thermal decomposition of long-chain iron carboxylates such as Fe(III) oleate, palmitate, and myristate. In the majority of cases, spherical NPs are obtained; however, nonspherical morphologies were observed in some "extreme" conditions. For example, iron oxide nanostars are formed in eicosane at the Fe oleate/oleic acid ratio of 0.49 g/mL: the highest oleic acid content when NPs still form. The cubic NPs with flat facets are obtained by decomposition of iron palmitate at the lowest palmitic acid fractions, but the most monodisperse cubes are formed at the Fe palmitate/pahnitic acid ratio of 1.19 g/mL. Elliptical NPs are formed from Fe myristate with the most well-defined structure. Easy transformation of these NPs from wustite to maghemite without aggregation and loss of solubility makes them excellent candidates for biomedical applications after proper functionalization described in our preceding papers.