Directed Self-Assembly as a Route to Ferromagnetic and Superparamagnetic Nanoparticle Arrays

被引：11
|
作者：
Schelhas, Laura T. [1 ]
Farrell, Richard A. [1 ]
Halim, Udayabagya [1 ]
Tolbert, Sarah H. [1 ,2 ,3 ]
机构：
[1] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
[3] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA
来源：
ADVANCED FUNCTIONAL MATERIALS | 2014年 / 24卷 / 44期
基金：
美国国家科学基金会;
关键词：
directed self-assembly; magnetic nanocrystals; patterning; superparamagnetism; BLOCK-COPOLYMER LITHOGRAPHY; ATOMIC LAYER DEPOSITION; FEPT NANOPARTICLES; MAGNETIC STORAGE; DENSITY; GRAPHOEPITAXY; NANOSTRUCTURES; TEMPLATES; PHOTORESIST; CONFINEMENT;
D O I：
10.1002/adfm.201401921
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Block co-polymer patterns are attractive candidates for nanoparticle assemblies. Directed self-assembly of block co-polymers in particular allows for long range ordering of the patterns, making them interesting scaffolds for the organization of magnetic particles. Here, a method to tune the channel width of polymer-derived trenches via atomic layer deposition (ALD) of alumina is reported. The alumnia coating provides a much more thermally robust pattern that is stable up to 250 degrees C. Using these patterns, magnetic coupling in both ferromagnetic and superparamagnetic nanocrystal chains is achieved.
引用
收藏
页码：6956 / 6962
页数：7
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