Key factors governing lifetime of carbyne-graphene nanoelements
S Kotrechko and A Timoshevskii and E Kolyvoshko and Y Matviychuk and N Stetsenko and I Mikhailovskij, THEORETICAL AND APPLIED FRACTURE MECHANICS, 108, 102609 (2020).
The work concerns a new trend in the field of micro (nano) - mechanics, which is the development of methods for predicting the stability and lifetime of nanoelements and nanosystems. This research analyses and summarizes the main physical effects that control the lifetime of carbyne-graphene nanoelements and similar nanosystems consisting of a combination of one-dimensional and two-dimensional nanostructures. Based on the findings of first-principle calculations, it is ascertained that a region exists where there are no equilibrium positions for atoms. This is a key feature of deformation of carbyne-graphene nanoelements (CGNs), which predetermines their lifetime. The mechanism of fluctuation-induced atomic bond break under the action of a force field is considered, and the fluctuation model is analysed to predict the CGNs' lifetime, which enables to overcome the disadvantages of using classical models for these nano-objects.
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