Fig. 4
From: High-Efficient Excitation-Independent Blue Luminescent Carbon Dots
Emission and excitation spectra of CDs in different volume of water and pH. a Emission spectra of CDs with 300 ml deionized water (pH 10.41). b Emission spectra of CDs with 5 ml deionized water (pH 12.08). c Emission spectra of CDs with 300 ml deionized water (pH 12.08). d Excitation spectra of CDs at 445 nm in different volume of water