通过超聚集体形成，氧化铈纳米颗粒自发自组装成纳米棒。

Spontaneous self-assembly of cerium oxide nanoparticles to nanorods through supraaggregate formation.

作者信息

Kuiry Suresh C, Patil Swanand D, Deshpande Sameer, Seal Sudipta

机构信息

Surface Engineering and Nanotechnology Facility, Advanced Materials Processing and Analysis Center, and Department of Mechanical, Materials, and Aerospace Engineering, University of Central Florida, Orlando, Florida 32816, USA.

出版信息

J Phys Chem B. 2005 Apr 21;109(15):6936-9. doi: 10.1021/jp050675u.

DOI:10.1021/jp050675u

PMID:16851784

Abstract

Self-assembly of cerium oxide nanoparticles to nanorods is reported. Such nanorods have an aspect ratio of 6 with a diameter of approximately 40 nm. The formation of cylindrical supraaggregates and their subsequent growth by preferential assembling of ceria nanocrystallites along the longitudinal direction was proposed to be the probable mechanism of spontaneous self-assembly of nanorods. The supraaggregate formation was facilitated by influencing the local curvature of the micelle surface in the presence of nitrate ions as a precursor solution. The nanorods were characterized using high-resolution transmission electron microscopy with energy dispersive spectroscopy and selected area electron diffraction for their morphology, chemistry, and crystal structure.

摘要

据报道，氧化铈纳米颗粒可自组装成纳米棒。此类纳米棒的长径比为6，直径约为40纳米。有人提出，圆柱形超聚集体的形成以及随后氧化铈纳米微晶沿纵向优先组装使其生长，可能是纳米棒自发自组装的机制。在前体溶液为硝酸根离子的情况下，通过影响胶束表面的局部曲率促进了超聚集体的形成。使用高分辨率透射电子显微镜结合能量色散光谱和选区电子衍射对纳米棒的形态、化学组成和晶体结构进行了表征。