Peng, Y., C. Lin, L. Long, T. Masaki, M. Tang, L. Yang, J. Liu, Z. Huang, Z. Li, X. Luo, J. R. Lombardi, and Y. Yang. “Charge-Transfer Resonance and Electromagnetic Enhancement Synergistically Enabling MXenes With Excellent SERS Sensitivity for SARS-CoV-2 S Protein Detection”. Nano-Micro Letters, vol. 13, Jan. 2021, p. 52, doi:10.1007/s40820-020-00565-4.