Corrigendum to “Single-sized N-functionality graphene quantum dot in tunable dual-modality near infrared–I/II illumination detection and photodynamic therapy under multiphoton nonlinear excitation” [Biosens. Bioelectron. 241 (2023) 115648/ DOI: 10.1016/j.bios.2023.115648](S0956566323005900)(10.1016/j.bios.2023.115648)

The authors regret<Due to the higher contrast and resolution of the new Fig. 7b-f compared to the previous ones, the authors believe that these updated figures can provide clearer images of the human cervical carcinoma cells (KB-50) after two-photon excitation. Consequently, the authors intend to submit a late corrigendum to replace the old Fig. 7b-f with these new ones. This change will not only better illustrate the scientific findings but also enhance the appeal to a wider audience, aligning with academic ethics and integrity. The authors sincerely apologize for any oversight in proofreading and respectfully request approval for the late corrigendum after the publication.[Formula presented] The authors would like to apologize for any inconvenience caused.