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Synthesis of high-quality near-infrared-emitting CdTeS alloyed quantum dots via the hydrothermal method

机译:水热法合成高质量近红外发射CdTeS合金量子点

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摘要

We present a facile one-pot method to fabricate water-dispersed near-infrared-emitting (650-800 nm) CdTeS alloyed quantum dots with high photoluminescence quantum yields (PL QYs). Due to the hydrolysis of thiol ligands, the sulfur was incorporated into the CdTe nanocrystals, forming CdTeS alloyed QDs. The effects of the type of thiol ligands, ligand-to-Cd molar ratio, and precursor concentration on the QDs were investigated, and thus high-quality water-dispersed CdTeS alloyed QDs (PL QYs 68%) were prepared with a high efficiency via the hydrothermal method. Water-dispersed CdTeS alloyed QDs with excellent emissions in the near-IR spectrum window have great potential in biological and medical applications especially in in vivo imaging.
机译:我们提出了一种简便的一锅法,以制备具有高光致发光量子产率(PL QYs)的水分散型近红外发射(650-800 nm)CdTeS合金量子点。由于硫醇配体的水解,硫被掺入CdTe纳米晶体中,形成CdTeS合金化QD。研究了硫醇配体类型,配体与Cd的摩尔比和前体浓度对量子点的影响,从而通过高效液相色谱法高效制备了高质量的水分散CdTeS合金量子点(PL QYs为68%)。水热法。在近红外光谱窗口中具有出色发射性能的水分散CdTeS合金量子点在生物学和医学应用中特别是在体内成像方面具有巨大潜力。

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