Effect of swift heavy ion irradiation on optical absorption properties of SWCNTs

Vishalli,; Raina, K. K.; Avasthi, D.K.; Srivastava, Alok Kumar; Dharamvir, Keya

doi:10.1063/1.4946529

Cited by 1 publication

(1 citation statement)

References 13 publications

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“…Raman spectroscopy has also been widely used to investigate different carbon-based materials. It has been used to study the influence of the twist angle in combination with defects of bi-layered graphene on the Raman peaks [ 25 ], to correlate ion irradiation to the number of defects and the change in elastic modulus [ 7 ], the comparison of C + and Ni + ion irradiation for defect production in SWCNTs [ 26 ], the characterisation of composite materials containing MWCNTs [ 27 ], the implantation of Si and C ions into DWCNTs [ 28 ], and to differentiate between carbon materials with different sp 2 environment [ 29 ]. The latter study focused on graphene, highly oriented pyrolytic graphite (HOPG) and SWCNT and the modification of the Raman spectra when introducing defects in the different materials.…”

Section: Introductionmentioning

confidence: 99%

Defect formation in multiwalled carbon nanotubes under low-energy He and Ne ion irradiation

Eswara¹,

Audinot²,

Adib³

et al. 2018

Beilstein J. Nanotechnol.

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The mechanical, structural, electronic and magnetic properties of carbon nanotubes can be modified by electron or ion irradiation. In this work we used 25 keV He+ and Ne+ ion irradiation to study the influence of fluence and sample thickness on the irradiation-induced damage of multiwalled carbon nanotubes (MWCNTs). The irradiated areas have been characterised by correlative Raman spectroscopy and TEM imaging. In order to preclude the Raman contribution coming from the amorphous carbon support of typical TEM grids, a new methodology involving Raman inactive Au TEM grids was developed. The experimental results have been compared to SDTRIMSP simulations. Due to the small thickness of the MWCNTs, sputtering has been observed for the top and bottom side of the samples. Depending on thickness and ion species, the sputter yield is significantly higher for the bottom than the top side. For He+ and Ne+ irradiation, damage formation evolves differently, with a change in the trend of the ratio of D to G peak in the Raman spectra being observed for He+ but not for Ne+. This can be attributed to differences in stopping power and sputter behaviour.

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