Figure 1 - uploaded by Sanjida Yeasmin
Content may be subject to copyright.
(a) Absorbance (black dash line), excitation (purple line), and emission spectra (red line) of G-CDs. (b) G-CDs emission spectra under various excitation wavelengths, ranging from 300 nm to 500 nm. (c) Photographs of G-CD solution under daylight and 365 nm UV excitation.
Source publication
We report green-emitting carbon dots (G-CDs) for sensitive and selective detection of pregnenolone (P5) hormone. The G-CDs prepared by a one-step solvothermal synthesis method showed a dual emission peak at 480 and 520 nm under 440 nm excitation. The G-CDs showed superior fluorescence intensity and chemical stability. Their interaction with P5 caus...
Contexts in source publication
Context 1
... steroid solutions were prepared in ethanol, while the rest were prepared in DI water. Figure 1(a) shows that the G-CD has two absorption peaks at 425 and 458 nm overlapping with the excitation peaks. The emission peaks are located at 480 and 520 nm. ...
Context 2
... emission peaks are located at 480 and 520 nm. The emission spectra under various excitation wavelengths in Figure 1(b) indicates the emission peaks centered at 480 and 520 nm with a narrow FWHM of 30 nm are independent of excitation wavelengths. The narrow-band emission can minimize the interference with other fluorescence emissions, suitable for multicolor fluorescent sensing or imaging. ...
