Using Voronoi tessellations to assess nanoparticle-nanoparticle interactions and ordering in monolayer films formed through electrophoretic deposition.
Using Voronoi tessellations to assess nanoparticle-nanoparticle interactions and ordering in monolayer films formed through electrophoretic deposition.
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使用 Voronoi 镶嵌来评估通过电泳沉积形成的单层薄膜中的纳米粒子-纳米粒子相互作用和排序。
DOI：
10.1021/jp305958w
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
J. Dickerson
中科院分区：
文献类型：
--
作者：
Alex J. Krejci;Colin G W Thomas;Jyotirmoy Mandal;I. Gonzalo;Weidong He;R. Stillwell;Ju;Dhiraj Prasai;V. Volkov;K. Bolotin;J. Dickerson
通过电泳沉积制备了两种不同尺寸（9.6 nm 和 16.5 nm）的单层氧化铁纳米颗粒。使用 Voronoi 镶嵌技术分析了薄膜内纳米颗粒的排列。这些分析表明，薄膜具有相同的有序度，并且薄膜在厘米长度尺度上是均匀的。获得了颗粒间距的精确测量，并计算了磁偶极子相互作用的大小。较大纳米颗粒之间的偶极-偶极相互作用比较小纳米颗粒大 14 倍，表明磁耦合相互作用不可能是系统中有序的唯一来源。
Monolayers of iron oxide nanoparticles of two different sizes, 9.6 nm and 16.5 nm, were fabricated through electrophoretic deposition. The arrangements of nanoparticles within the films were analyzed using the technique of Voronoi tessellations. These analyses indicated that the films possessed equivalent degrees of ordering, and that the films were uniform over centimeter length scales. Precise measurements of the interparticle spacing were obtained, and the magnitudes of magnetic dipole interactions were calculated. The dipole-dipole interaction among the larger nanoparticles was 14 times larger than that of the smaller nanoparticles, indicating that magnetic coupling interactions could not have been the lone source of ordering in the system.