Vast magnetic monolayer film with surfactant-stabilized Fe3O4 nanoparticles using Langmuir-Blodgett technique
Vast magnetic monolayer film with surfactant-stabilized Fe3O4 nanoparticles using Langmuir-Blodgett technique
复制标题
DOI：
10.1021/jp072612c
复制
发表时间：
2007-08-09
影响因子：
3.3
通讯作者：
Kang, Young Soo
中科院分区：
文献类型：
--
作者：
Lee, Don Keun;Kim, Young Hwan;Kang, Young Soo
虽然有几种方法（例如，自组装、旋涂等）已经探索用于制备纳米颗粒的单层膜，在某些区域中，基底上的单层通常小于1 μ m × 1 μ m。该方法并不理想地适合于产生高度有序和紧密堆积的均匀的巨大单层纳米颗粒，这对于应用是潜在重要的。在这份报告中，制备的巨大的单层膜的Fe 3 O 4纳米粒子具有广泛的范围，如超过3.25 μ m × 3.95 μ m的报道。他们的TEM图像显示了Fe 3 O 4纳米颗粒的二维组装，证明了这些纳米颗粒的均匀性。利用压力-面积等温曲线研究了油酸包覆Fe 3 O 4纳米粒子与硬脂酸分子在空气/水界面形成的Langmuir单分子层及其稳定性。TEM和BAM研究表明，增加表面压力导致从分离良好的纳米颗粒复合物的域的过渡，以及压缩，单颗粒层。
Although several methods (e.g., self-assembly, spin coating, etc.) have been explored for making a monolayer film of nanoparticles, the monolayer on a substrate is typically smaller than 1 mu m x 1 mu m in certain regions. The approach is not ideally suitable for generating a highly ordered and close-packed homogeneous vast monolayer of nanoparticles, which is potentially important for applications. In this report, the preparation of the vast monolayer films of Fe3O4 nanoparticles with a wide range such as that over 3.25 mu m x 3.95 mu m is reported. Their TEM images showed a two-dimensional assembly of Fe3O4 nanoparticles, demonstrating the uniformity of these nanoparticles. The formation of a Langmuir monolayer of the oleic acid-coated Fe3O4 nanoparticles mixed with stearic acid molecules at the air/water interface and its stability were studied with a pressure-area isotherm curve. TEM and BAM studies demonstrated that increasing surface pressure resulted in a transition from well-separated domains of nanoparticles complex to well-compressed, monoparticulate layers.