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Carbon nanotube Y-junctions are of great interest to the next generation ofinnovative multi-terminal nanodevices. Topological indices aregraph-theoretically based parameters that describe various structuralproperties of a chemical molecule. The entropy of a graph is a topologicaldescriptor that serves to characterize the complexity of the underlyingmolecular graph. The concept of entropy is a physical property of athermodynamic system. Graph entropies are the essential thermophysicalquantities defined for various graph invariants and are applied to measure theheterogeneity and relative stabilities of molecules. In this paper, severalneighborhood degree sum-based topological indices including graph-basedentropies of carbon nanotube Y-junction graphs are computed.

Computational analysis of NM-polynomial based topological indices and graph-entropies of carbon nanotube Y-junctions