Focused Ion Beam (FIB) is one of the important machining techniques to fabricate diamond sensors/detectors used for drug analysis, chemical analysis and bio-sensing applications. In-depth understanding of the high energy collision process and the residual damage induced along the trace of gallium ion could undoubtedly facilitate the development and improvement of performance of such devices through the optimization of machining processes. Based on the merit offered by large-scale molecular dynamics (MD) simulation method and the new progress made in high performance computing technique (HPC), a new atomistic modelling system was proposed in this paper to investigate the high energy collision process involved two gallium ions. The simulation results indicated that the energetic ion collision process comprises a bombardment event with a pulse temperature and a lateral relative long period annealing recrystallization process. The peak temperature for the second ion collision was 129.2 K higher than the first one, which indicates the alternation of the thermal conductivity of diamond due to the formation of amorphous (sp2 graphite-like) structure during the first ion collision and annealing process. Besides giving the damage configuration and distribution in diamond after fully recrystallization, the simulation also used coordination number (CN) and radius distribution function (RDF) to revel the change of diamond lattice structure after the collision process, which provided an insight of damage induced by FIB process.
|Title of host publication
|Proceedings of the 13th International Conference of the European Society for Precision Engineering and Nanotechnology
|Subtitle of host publication
|Number of pages
|Published - 2013
|13th International Conference of the European Society for Precision Engineering and Nanotechnology - Maritim Hotel, Berlin, Germany
Duration: 27 May 2013 → 31 May 2013
Conference number: 13
http://optik-bb.de/en/content/euspen-13th-international-conference-european-society-fpr-precision-engineering (Link to Conference Details)
|13th International Conference of the European Society for Precision Engineering and Nanotechnology
|27/05/13 → 31/05/13
|The 13th Conference and exhibition of the European Society for Precision Engineering and Technology (euspen) will provide a leading forum for industrialists and academics alike to review the best of worldwide industrial innovation, progressive research and technology developments. It offers information on the latest precision and ultra-precision developments, reports and discussion on progress, and room for starting and continuing international cooperation between researchers and industrialists. Delegates will gain an insight of the precision engineering and nanotechnology priorities of Europe's Leading Industrial Nation, Germany. With the country's high importance of energy generation and efficiency in mind the special session topic of the 13th euspen conference and exhibition will focus on precision engineering for the advancement of energy generation, renewable energy and energy efficient systems.