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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

» presentations   » 2014.09.01-05

Atomically Thin Boron: Does it exist?

Jens Kunstmann, Viktor Bezugly, Hauke Rabbel, Mark H. Rümmeli, Gianaurelio Cuniberti

The 18th International Symposium on Boron, Borides and Related Materials (ISBB 2014)

2014.09.01-05; Honolulu, Hawaii, USA

We want to present a critical discussion about the possible existence of atomically thin boron structures, such as boron nanotubes and fullerenes. Despite recent successes in the synthesis of boron nanotubes (BNTs) many questions about their atomic structure and other basic properties do remain. Systematic theoretical studies on boron fullerenes suggested that such fullerenes are unlikely to exist. Recently, we unveiled the dynamical stability of BNTs by means of first-principles molecular dynamics simulations. We found that free-standing, single-wall BNTs with diameters larger than 0.6 nm are thermally stable at the experimentally reported synthesis temperature of 870C and higher. The walls of thermally stable BNTs are found to have a variety of different mixed triangular- hexagonal morphologies. Our results indicate that mixed triangular-hexagonal morphologies are structural paradigm for atomically thin boron. Furthermore, our recent experimental results on the room temperature synthesis of boron nanowires and boron oxide nanotubes will be presented.

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