fig3
![Recent advances in heavily doped plasmonic copper chalcogenides: from synthesis to biological application](https://image.oaes.cc/553510e7-6758-40d0-97d1-4515ea225056/5754.fig.3.jpg)
Figure 3. (A) Valence band spectra of Cu2-xSe NPs and (B) Mott-Schottky diagram; (C) Schematic diagram of energy band diagrams in newly deposited (pristine), lithiated (charged), and fully delithiated (discharged) states[70]. Copyright © American Chemical Society 2018.