Photo- and Radiofrequency-Induced Heating of Photoluminescent Colloidal Carbon Dots

Gauhar K Mussabek (1, 2) , Nazym Zhylkybayeva , Ivan Lysenko (3) , Pavlo Lishchuk (3) , Saule Baktygerey , Dana Yermukhamed , Yerzhan Taurbayev , Gani Sadykov , Alexander Zaderko (4) , Valeriy A Skryshevsky (4) , Vladyslav Lisnyak , Vladimir Lysenko (5)

1 KazNU - Al-Farabi Kazakh National University [Almaty]
2 CS MES RK - Institute of Information and Computational Technologies CS MES RK,
3 Faculty of Physics [Kyiv]
4 Institute of High Technologies [Kyiv]
5 iLM - FENNEC - iLM - Formation, élaboration de nanomatériaux et cristaux

Nitrogen- and oxygen-containing carbon nanoparticles (O, N-CDs) were prepared by a facile one-step solvothermal method using urea and citric acid precursors. This method is cost-effective and easily scalable, and the resulting O, N-CDs can be used without additional functionalization and sample pretreatment. The structure of O, N-CDs was characterized by TEM, AFM, Raman, UV-vis, and FTIR spectroscopies. The obtained O, N-CDs with a mean diameter of 4.4 nm can be easily dispersed in aqueous solutions. The colloidal aqueous solutions of O, N-CDs show significant photothermal responses under red-IR and radiofrequency (RF) irradiations. The as-prepared O, N-CDs have a bright temperature-dependent photoluminescence (PL). PL/PLE spectral maps were shown to be used for temperature evaluation purposes in the range of 30–50 °C. In such a way, the O, N-CDs could be used for biomedicine-related applications such as hyperthermia with simultaneous temperature estimation with PL imaging.

Domaines: Sciences de l'ingénieur [physics]

Gauhar K Mussabek, Nazym Zhylkybayeva, Ivan Lysenko, Pavlo Lishchuk, Saule Baktygerey, et al.. Photo- and Radiofrequency-Induced Heating of Photoluminescent Colloidal Carbon Dots. Nanomaterials, 2022, 12 (14), pp.2426. ⟨10.3390/nano12142426⟩. ⟨hal-03736846⟩