X-ray photoelectron and Raman spectroscopic studies of MeV proton irradiated graphite

被引：37

作者：

Mathew, S. ^{[1
]}

Joseph, B. ^{[1
]}

Sekhar, B. R. ^{[1
]}

Dev, B. N. ^{[1
,2
]}

机构：

[1] Inst Phys, Bhubaneswar 751005, Orissa, India

[2] Indian Assoc Cultivat Sci, Kolkata 700032, India

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2008年 / 266卷 / 14期

关键词：

graphite; ion irradiation; X-ray photoelectron spectroscopy; Raman spectroscopy;

D O I：

10.1016/j.nimb.2008.03.233

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 [仪器科学与技术]; 080401 [精密仪器及机械]; 081102 [检测技术与自动化装置];

摘要：

Poly-crystalline graphite samples were irradiated using 2.25 MeV H+ ions with a fluence of 2 x 10(17) ions/cm(2). Magnetic ordering in highly oriented pyrolytic graphite samples have been reported earlier under the similar irradiation conditions [Esquinazi et al., Phys. Rev. Lett. 91 (2003) 227201]. In that study, the authors attribute the observed irradiation induced magnetic ordering to the formation of a mixed sp(2)-sp(3) hybridized carbon atoms. In the present study, we report the X-ray photoelectron and Raman spectroscopic studies on pristine and irradiated samples. Irradiated samples are found to show an increased number of sp(3) hybridized carbon atoms. However, the Raman spectrum, specially the second order data, do indicate that the nature of the graphene lattice structure has been preserved in the irradiated samples. The mechanisms for the irradiation induced enhancement in sp(3) hybridization are discussed. (C) 2008 Published by Elsevier B.V.

引用

页码：3241 / 3246

页数：6

共 36 条

[1]

Irradiation effects in carbon nanostructures [J].