Interplay between intrinsic structure and multistate emissive properties of N and N, B - doped Carbon Dots

PSCHUNDER, FERNANDO; JOSE MARTIN RAMALLO LOPEZ; HUERGO, A. M.; BHATTACHARYYA, S.; REQUEJO, F. G.

Campinas

Encuentro; 28th RAU (Annual Users Meeting - LNLS/CNPEM); 2018

CNPEM

Carbon-based quantum dots, carbon dots (CD), have attracted attention because of their unique tunable photoluminescence properties, easy synthetic procedures, long-term stability, biocompatibility and ability to modify the surface functionality. Such capabilities make them potential candidates for optoelectronics and biomedical applications. Herein, we have synthesized N doped (N-CD) and N, B co-doped CD (NB-CD) from citric acid (C-source), urea (N-source) and boric acid (B-source) by using an already reported bottom-up microwave assisted synthesis procedure. In order to correlate the intrinsic structural features of CDs with their photoluminescence properties, X-ray photoelectron spectroscopy, XPS, and N K-Edge Near Edge X-Rays Absorption Fine Structure, NEXAFS, experiments were carried out using conventional and synchrotron radiation sources.