Diamond quantum dots (diamond QDs) have attracted great interest on account of their excellent physical and chemical properties. Here, we synthesized the diamond QDs 2–8 nm in diameter through alkaline assisted oxidation at room temperature. This composite method fairly original, simple, low-cost, and eco-friendly. High-resolution TEM, XRD and XPS confirm the diamond structure of the synthesized nanocrystals. The diamond QDs exhibit concurrent multiband luminescence across the whole visible region. The study based on the photoluminescence, UV–Vis absorption, and Fourier-transform infrared reveals that the fluorescence emission originates from the C–O–C and C(O)O related surface defects.

金刚石量子点（金刚石量子点）由于其出色的物理和化学特性而引起了极大的兴趣。在这里，我们通过在室温下通过碱辅助氧化合成了直径为2-8 nm的金刚石QD。这种复合方法相当原始，简单，低成本且环保。高分辨率TEM，XRD和XPS证实了合成纳米晶体的金刚石结构。钻石QD在整个可见光区域内同时显示多波段发光。基于光致发光，UV-Vis吸收和傅立叶变换红外的研究表明，荧光发射源自C–OC–C和C（O）O相关的表面缺陷。