@article{costa_sampaio_santos jr_suárez_amaral-labat_malfatti_2025,  title={Two-Step Simple Synthesis of Nanoscale Carbon Spheres via the Stöber Method Using Black Wattle Tannin as an Eco-Friendly Precursor for Supercapacitor Applications},  volume={28},  ISSN={1516-1439},  url={https://doi.org/10.1590/1980-5373-MR-2025-0337},  DOI={10.1590/1980-5373-MR-2025-0337},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Costa, Max Krapf and Sampaio, Edna Jerusa Pacheco and Santos Jr, Adilar Gonçalves and Suárez, Andrés Cuña and Amaral-Labat, Gisele and Malfatti, Célia de Fraga},  year={2025},  pages={e20250337} }