The role of pH in the density control of ferritin-based catalyst nanoparticles towards scalable single-walled carbon nanotube growth

被引：10

作者：

Chikkadi, Kiran ^{[1
]}

Mattmann, Moritz ^{[1
]}

Muoth, Matthias ^{[1
]}

Durrer, Lukas ^{[1
]}

Hierold, Christofer ^{[1
]}

机构：

[1] ETH, Dept Mech & Proc Engn, CH-8092 Zurich, Switzerland

来源：

MICROELECTRONIC ENGINEERING | 2011年 / 88卷 / 08期

基金：

瑞士国家科学基金会;

关键词：

Catalyst; Ferritin; pH; Single-walled; Carbon nanotube; Growth; Scalability; Nanoparticle;

D O I：

10.1016/j.mee.2011.02.069

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present a study on the influence of pH in the control of the surface density of ferritin-based iron oxide nanoparticles. It is found that at pH 3, the adsorption coverage of ferritin on the substrate is more than 1000 particles/mu m(2), owing to coulombic attraction between ferritin and the substrate. Upon increasing the pH to 9 and reducing the concentration, the surface density is reduced to as low as 2 particles/mu m(2), owing to coulombic repulsion. The average particle size is unaffected by the pH change. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2478 / 2480

页数：3

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