Formation of nitrogen-doped graphene nanoscrolls by adsorption of magnetic γ-Fe2O3 nanoparticles

被引：151

作者：

Sharifi, Tiva ^{[1
]}

Gracia-Espino, Eduardo ^{[1
,2
]}

Barzegar, Hamid Reza ^{[1
]}

Jia, Xueen ^{[1
]}

Nitze, Florian ^{[1
]}

Hu, Guangzhi ^{[1
]}

Nordblad, Per ^{[3
]}

Tai, Cheuk-Wai ^{[4
]}

Wagberg, Thomas ^{[1
]}

机构：

[1] Umea Univ, Dept Phys, S-90187 Umea, Sweden

[2] Umea Univ, Dept Chem, S-90187 Umea, Sweden

[3] Uppsala Univ, Dept Engn Sci, S-75121 Uppsala, Sweden

[4] Stockholm Univ, Arrhenius Lab, Dept Mat & Environm Chem, S-10691 Stockholm, Sweden

来源：

NATURE COMMUNICATIONS | 2013年 / 4卷

基金：

瑞典研究理事会;

关键词：

IRON-OXIDES; CARBON NANOSCROLLS; THIN-FILMS; HEMATITE; WATER; TRANSFORMATIONS; SPECTROSCOPY; FABRICATION; NANOTUBES; MAGHEMITE;

D O I：

10.1038/ncomms3319

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Graphene nanoscrolls are Archimedean-type spirals formed by rolling single-layer graphene sheets. Their unique structure makes them conceptually interesting and understanding their formation gives important information on the manipulation and characteristics of various carbon nanostructures. Here we report a 100% efficient process to transform nitrogen-doped reduced graphene oxide sheets into homogeneous nanoscrolls by decoration with magnetic gamma-Fe2O3 nanoparticles. Through a large number of control experiments, magnetic characterization of the decorated nanoparticles, and ab initio calculations, we conclude that the rolling is initiated by the strong adsorption of maghemite nanoparticles at nitrogen defects in the graphene lattice and their mutual magnetic interaction. The nanoscroll formation is fully reversible and upon removal of the maghemite nanoparticles, the nanoscrolls return to open sheets. Besides supplying information on the rolling mechanism of graphene nanoscrolls, our results also provide important information on the stabilization of iron oxide nanoparticles.

引用

页数：9

共 59 条

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