Carbon Dot Based Sensing of Dopamine and Ascorbic Acid

Figure 2

(a) The UV-VIS absorption spectrum and photoluminescence (PL) spectrum of CDs excited at 340 nm. The inset of (a) shows the images of the CD solution viewed under normal light and UV light. (b) Powder XRD spectrum of CD solution and (c) FTIR spectrum of CDs prepared from tea.

(a)

(b)

(c)