“Theoretical and Experimental Study of Surface-Enhanced Raman Scattering of 4,4’-Bipyridine Molecule on Graphene”. Journal of Atomic and Molecular Sciences 8, no. 3 (July 10, 2018): 127–130. Accessed December 5, 2025. https://www.global-sci.com/index.php/jams/article/view/14811.