Nature provides an almost limitless supply of natural sources, which inspires scientists to develop new materials with novel applications and lower environmental impact. Here, we prepared nitrogen and sulfur co-doped carbon dots (CDs) by hydrothermal treatment of Allium fistulosum (Af-CDs). These materials exhibited strong fluorescence with an absolute quantum yield of 10.48%. The photoluminescence of the CDs is very stable across different pH values, high NaCl concentrations, and in the presence of different metal ions, suggesting that the CDs have a wide range of applications even under rugged conditions. The CDs offer a selective optical stain for multicolor imaging in MCF-7 and K562 cell cytoplasm. The as-prepared CDs were explored for cell imaging and offer great biocompatibility. The remarkable properties of the CDs indicated their potential toward sensing and bioapplications.

中文翻译：

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从瘘管绿色合成氮和硫共掺杂碳点，用于细胞成像†

大自然提供了几乎无限的自然资源，这激发了科学家开发具有新颖用途和较低环境影响的新材料。在这里，我们通过水热处理葱瘘制备了氮和硫共掺杂碳点（CD）。（Af-CD）。这些材料显示出强荧光，绝对量子产率为10.48％。CD的光致发光在不同的pH值，高的NaCl浓度以及存在不同的金属离子的情况下非常稳定，这表明CD甚至在恶劣的条件下也具有广泛的应用范围。CD为MCF-7和K562细胞质中的多色成像提供了选择性的光学染色。探索了所制备的CD进行细胞成像，并提供了很好的生物相容性。CD的卓越性能表明它们在传感和生物应用方面的潜力。