Synthesis of Boron Nitride Quantum Dots Using a Mechanical Milling- Solvothermal Process

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Angizi, Shayan | 2018

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 50496 (07)
University: Sharif University of Technology
Department: Materials Science and Engineering
Advisor(s): Simchi, Abdolreza
Abstract:
Boron Nitride Quantum Dots, as a new member of Heavy-metal-free Quantum dots has attracted many attention due to their unique properties. The hyroxylate functionalized BNQDs was synthesized with two steps fabrication approache which were contained mechanical milling and solvothermal process. It has been shown that 12 hours for mechanical milling and 24 hours for solvothermal process would be the most optimum time that produce well disperse functionalized BNQDs . The characterization results have proved that the as-prepared BNQDs have lateral size at around 5 nm with thickness in range of 4-6 layers. Also, it has been demonstrated that OH functional groups can attache into the surface of BNQDs during synthesis process and lead to a stong luminescence under UV radiation and decreasing of Band Gap from 6.5 ev to 4.15 ev
Keywords:
Band Gap ; Mechanical Milling ; Solvothermal Method ; Functionalization ; Boron - Nitride ; Quantum Dot

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