graphene
; iron nanoparticles; intercalationcompound
; Raman spectroscopy; XPS石墨结构层包嵌铁纳米粒子是一种纳米尺度复合材料,具有
类似三明治的结构.研究表明,其拉曼光谱的E2g2模出现了红移,说
明铁纳米粒子外部原子将部分电荷转移给了碳网,与其X射线光电子
能谱的分析结果吻合.2阶和3阶石墨层间化合物前驱体的拉曼光谱
与其它受主型石墨层间化合物的类似,其内部层碳网和边界层碳网
的E2g2模频率不同.
Graphene encapsulated iron nanoparticles
(GEINPs) is a composite in nanometer scale. Its
structure is like a sandwich that the iron nanoparticles
are contained in graphite gallery. It was showed in this
paper that the vibration frequency of mode was red
shift in the Raman spectra of graphene encapsulated iron
nanoparticles. The result revealed that the partial
charge of outer atoms of the iron nanoparticles
encapsulated in graphite gallery had been transferred to
the hexagonal carbon nets and the result was coincident
with that of Xray photoelectron spectroscopy. The
Raman spectra of precursors, stage 2 and stage 3
graphite intercalation compounds were similar to that of
acceptor type graphite intercalation compounds, and the
frequency of mode of outer carbon layer is different
from that of inner carbon layer.
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收稿日期:20100812基金项目:国家自然科学基金
(50774071/E0402);湖北省教育厅科学研究项目(D20091505)资助
作者简介:薛俊(1976),女,湖北宜都人,博士研究生,讲师.研
究方向:功能材料和纳米材料.