8-12 July 2013
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=13&confId=32"><font color=#ff0000>SAIP2013 PROCEEDINGS AVAILABLE</font></a>

Modification of glassy Carbon under Strontium ion implantation

9 Jul 2013, 11:10
20m
Oral Presentation Track A - Division for Condensed Matter Physics and Materials DCMPM1

Speaker

Ms opeyemi odutemowo (university of pretoria)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

MSc

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

yes

Abstract content <br> &nbsp; (Max 300 words)

Diffusion, structural and surface changes of glassy carbon (Sigradur® G) due to implantation with 200keV strontium ions at room temperature are reported. The samples were implanted to a fluence of 2 ×1016 ions/cm2 at room temperature. The implanted samples were vacuum annealed at temperatures ranging from 200oC-900oC. The influence of ion implantation and annealing on surface topography was examined by the scanning electron microscopy (SEM), while Raman spectroscopy was used to monitor the corresponding structural changes induced in the glassy carbon. The depth profiles of the implanted strontium before and after annealing were determined using Rutherford backscattering (RBS).
Compared to SRIM predictions the implanted strontium profiles was broader. After annealing, diffusion of the strontium atoms took place with a significant amount of the strontium atoms migrating to the surface of the glassy carbon. Evaporation of the strontium atoms was noticed as the melting point of strontium (769oC) was approached.
The Raman spectrum showed that only some of the damage due to implantation was annealed out. Annealing at 20000C for 5 hours resulted in a Raman spectrum very similar to that of virgin glassy carbon indicating that the damage due to the ion implantation was annealed out. SEM showed large differences in the surface topography of the polished glassy carbon surfaces and those of as-implanted samples. Annealing did not significantly change the surface microstructure of the implanted samples.

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

yes

Main supervisor (name and email)<br>and his / her institution

Prof. J.B. Malherbe1
University of Pretoria, SA
Johan.Malherbe@up.ac.za

Primary author

Ms opeyemi odutemowo (university of pretoria)

Co-authors

Mr Dolly Langa (University of pretoria) Prof. Johan Malherbe (University of pretoria)

Presentation Materials

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