%0 Journal Article %T If graphynes turn into graphene: the thermal stability study %A Yi-Guo Xu %A Chen Ming %A Zheng-Zhe Lin %A Fan-Xin Meng %A Jun Zhuang %A Xi-Jing Ning %J Physics %D 2013 %I arXiv %X The thermal stability of $\alpha$-, $\beta$-, 6,6,12-graphyne and graphdiyne was studied by a statistic model, which was seriously tested by classical molecular dynamics simulations. By first-principles calculations of related potential energy curves, the model predicts that all the lifetime of free-standing single layer graphynes considered is more than 10$^{44}$ years at room temperature. When the temperature gets up to 1000 K, they are still very stable, but quickly turn into graphene if the temperature is about 2000 K %U http://arxiv.org/abs/1310.2116v1