摘要：Recently we demonstrated synthesis of confined carbyne inside double-walled carbon nanotubes (DWCNTs) with a record length of more than 6000 carbon atoms [1]. This opens a trail into uncharted territory, which will now allow for the first time unraveling intrinsic properties of such confined polyyne and carbyne. For example, the interaction and charge transfer between the carbyne and their host CNTs [2] lead to an increase of the photoluminescence signal of the inner tubes [3]. Very recently excitation of the confined carbyne inside the DWCNTs revealed additional resonances [4]. These resonances are suggested to be excitonic and related to ground state and excited state of carbon chains.

[1] Nat. Mater. 15, 634, 2016
[2] Phys. Rev. B? 94, 195422, 2016
[3] Adv. Funct. Mater. 26, 4874, 2016
[4] arXiv:1705.02259, 2017