Understanding the growth mechanism of AgInS₂ nanoparticles could benefit the designed growth of I–III–VI₂ nanomaterials and their applications in photonics, optoelectronics, etc. Herein, using tris(dibutyldithiocarbamate) indium(III) [In((C₄H₉)₂NCS₂)₃] ([InR₃]) and dibutyldithiocarbamate silver(I) [Ag((C₄H₉)₂NCS₂)] ([AgR]) precursors, AgInS₂-based nanoparticles with different structures have been synthesized in a controlled manner through a one-pot approach via different growth mechanisms in 1-dodecanethiol (DDT) and oleylamine (OLA), respectively. The DDT and OLA could participate in the decomposition of precursors; thus, the [AgR]/DDT, [InR₃]/DDT, [AgR]/OLA, and [InR₃]/OLA were used herein to describe the decomposition steps. In DDT, the decomposition activity of [AgR]/DDT was much higher than that of [InR₃]/DDT; thus, the sequential decomposition of [AgR]/DDT and [InR₃]/DDT led to the formation of the Ag₂S nanoparticles intermediate first, which then reacted with [InR₃]/DDT to form metastable o-AgInS₂ nanoparticles via the cation exchange and alloy process, and finally evolved into o-AgInS₂@InS_x core@shell nanoparticles, while in OLA, the decomposition activity of [AgR]/OLA was slightly higher than that of [InR₃]/OLA. Thus, the quasi-co-decomposition of [AgR]/OLA and [InR₃]/OLA led to the formation of Ag-rich Ag–In–S amorphous nanoparticles intermediate first and then quickly evolved into stable t-AgInS₂/InS_x nanoparticles. In addition, the photoluminescence quantum yield (PLQY) of t-AgInS₂/InS_x nanoparticles was higher than that of o-AgInS₂@InS_x nanoparticles.

中文翻译：

---

配体诱导胶体 AgInS2 纳米颗粒的生长，具有调谐结构和光致发光特性


了解 AgInS₂ 纳米颗粒的生长机制有助于 I-III-VI₂ 纳米材料的设计生长及其在光子学、光电子学等领域的应用。在此，使用三（二丁基二硫代氨基甲酸酯）铟（III） [In（C₄H₉）₂NCS₂）₃] （[InR₃]）和二丁基二硫代氨基甲酸酯银（I） [Ag（（C₄H₉）₂NCS₂）] （[AgR]）前驱体，通过一锅法通过1-十二硫醇（DDT）和油胺（OLA）中的不同生长机制以受控方式合成了具有不同结构的AgInS₂基纳米颗粒， 分别。DDT 和 OLA 可以参与前驱体的分解;因此，本文使用 [AgR]/DDT、[InR₃]/DDT、[AgR]/OLA 和 [InR₃]/OLA 来描述分解步骤。在 DDT 中，[AgR]/DDT 的分解活性远高于 [InR₃]/DDT;因此，[AgR]/DDT 和 [InR₃]/DDT 的连续分解首先导致 Ag₂S 纳米颗粒中间体的形成，然后与 [InR₃]/DDT 反应，通过阳离子交换和合金过程形成亚稳态的 o-AgInS ₂ 纳米颗粒，最后演变成 o-AgInS₂@InS_x core@shell纳米颗粒中，而在 OLA 中，[AgR]/OLA 的分解活性略高于 [InR₃]/OLA。因此，[AgR]/OLA 和 [InR₃]/OLA 的准共分解首先导致富含 Ag 的 Ag-In-S 无定形纳米颗粒的形成，然后迅速演变成稳定的 t-AgInS₂/InS _x 纳米颗粒。 此外，t-AgInS₂/InS_x 纳米颗粒的光致发光量子产率 （PLQY） 高于 o-AgInS ₂@InS_x 纳米颗粒。