Self-Organization and/or Nanocrystallinity of Co Nanocrystals Effects on the Oxidation Process Using High-Energy Electron Beam

被引：7

作者：

Cazacu, Ana ^{[1
,2
]}

Larosa, Claudio ^{[1
]}

Beaunier, Patricia ^{[3
]}

Laurent, Guillaume ^{[4
]}

Nanni, Paolo ^{[1
]}

Mitoseriu, Liliana ^{[2
]}

Lisiecki, Isabelle ^{[4
]}

机构：

[1] Univ Genoa, Dept Chem & Proc Engn, I-16126 Genoa, Italy

[2] Alexandru Ioan Cuza Univ, Dept Phys, Iasi 700506, Romania

[3] Univ Paris 06, UPMC, UMR 7197, LRS, F-94200 Ivry, France

[4] Univ Paris 06, CNRS, UMR 7070, LM2N, F-75231 Paris 05, France

来源：

ADVANCED FUNCTIONAL MATERIALS | 2014年 / 24卷 / 01期

关键词：

nanocrystals; 2D superlattices; nanocrystallinity effect; electron beam effect; COBALT NANOCRYSTALS; SILVER NANOCRYSTALS; OPTICAL-PROPERTIES; SIZE DISTRIBUTION; SUPRA-CRYSTALS; NANOPARTICLES; 2D; SUPERLATTICES; OXYGEN; SUPRACRYSTALS;

D O I：

10.1002/adfm.201301465

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The enhanced stability of Co nanocrystals (NCs) when they are highly ordered at both nanometer and micrometer scales is reported. For the first time, it is shown that both the crystalline structure of Co nanoparticles (NPs) and their 2D hexagonal organization have a significant impact on the oxidation process rate enabling to produce various types of nanostructures including core-shell NPs. The Co core can be either polycrystalline or hexagonal close-packed (hcp) single-crystalline, whereas the oxide shell is composed either of CoO or of the spinel structrure Co3O4. The present results are evidenced through a careful high-resolution transmission electron microscopy (HRTEM) study and are highly reproducible.

引用

页码：164 / 170

页数：7

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