Fig. 8
From: Roles of MXenes in biomedical applications: recent developments and prospects
a The AFM images of Nb2CTx quantum dots after 24 h of different biodegradation treatments and the corresponding height distributions. Reproduced with permission from Ref. [107], © Elsevier 2020. b Schematic diagram of the preparation of N,P-MQD [22]. c Fluorescence emission spectra of the N, P-MQDs prepared at 120 ℃ at different excitation wavelengths. Inset: photo under UV light (365 nm). Reproduced with permission from Ref. [22], © Royal Society of Chemistry 2019