Abstract

Carbon nanodots are one of the latest intriguing members of the nanocarbon family due to their improved aqueous solubility, low-cost production, good conductivity, nontoxic behavior, high biocompatibility, and eco-friendly nature in contrast to chemically derived carbon nanomaterials. In the present study, the water-soluble carbon nanodots were synthesized by using the one-step hydrothermal method. Tangerine juice was used as a carbon source. The synthesized carbon dots were characterized by X-ray diffraction, high-resolution transmission electron microscopy, UV-Vis spectrum and fluorescence spectra. DFT-based ab initio material modeling technique including the Van der Waals interactions was applied. The electronic properties were examined by DOS analysis. Although the geometrical shapes of carbon nanodots are known as quasi-spherical, according to the HR-TEM results, carbon nanodot particles that consist of cuboidal geometric shapes were found for the first time in this study. Moreover, the usability of the synthesized carbon nanodots in security ink applications has been investigated.

摘要

与化学衍生的碳纳米材料相比，碳纳米点具有改善的水溶性、低成本生产、良好的导电性、无毒行为、高生物相容性和生态友好性，是纳米碳家族中最新的有趣成员之一。在本研究中，水溶性碳纳米点是通过一步水热法合成的。橘子汁用作碳源。合成的碳点通过 X 射线衍射、高分辨率透射电子显微镜、UV-Vis 光谱和荧光光谱进行表征。应用了基于 DFT 的 ab initio 材料建模技术，包括范德华相互作用。通过DOS分析检查电子特性。虽然碳纳米点的几何形状被称为准球形，根据 HR-TEM 结果，本研究首次发现了由立方体几何形状组成的碳纳米点颗粒。此外，已经研究了合成碳纳米点在安全油墨应用中的可用性。