CAS Key Laboratory of Chemistry of Northwestern Plant Resources/Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Key Laboratory of Sensor and Sensing Technology of Gansu Province, Gansu Academy of Sciences, Lanzhou, 730000, China.
Talanta. 2023 May 15;257:124347. doi: 10.1016/j.talanta.2023.124347. Epub 2023 Feb 15.
A clear formation mechanism is essential for the controllable synthesis of nanomaterials with different optical properties, which is also one of the challenges facing the preparation of fluorescent silicon nanomaterials. In this work, a one-step room temperature synthesis method was established to prepare yellow-green fluorescent silicon nanoparticles (SiNPs). The obtained SiNPs exhibited excellent pH stability, salt tolerance, anti-photobleaching ability and biocompatibility. Based on X-ray photoelectron spectroscopy, transmission electron microscopy, ultra high performance liquid chromatography tandem mass spectrometry and other characterization data, the formation mechanism of the SiNPs was proposed, which provided a theoretical basis and important reference for the controllable preparation of SiNPs and other fluorescent nanomaterials. In addition, the obtained SiNPs illustrated excellent sensitivity for nitrophenol isomers, the linear range of o-nitrophenol, m-nitrophenol, p-nitrophenol was 0.05-600 μM, 20-600 μM and 0.01-600 μM under the λ and λ were set as 440 nm and 549 nm, and related limit detection was 16.7 nM, 6.7 μM and 3.3 nM, respectively. The developed SiNP-based sensor achieved satisfactory recoveries in detecting nitrophenol isomers in a river water sample, showing great promise in practical applications.
明确的形成机制对于可控合成具有不同光学性质的纳米材料至关重要，这也是制备荧光硅纳米材料所面临的挑战之一。在这项工作中，建立了一种一步室温合成方法来制备黄绿色荧光硅纳米颗粒（SiNPs）。所得到的 SiNPs 表现出优异的 pH 稳定性、耐盐性、抗光漂白能力和生物相容性。基于 X 射线光电子能谱、透射电子显微镜、超高效液相色谱串联质谱等表征数据，提出了 SiNPs 的形成机制，为 SiNPs 及其他荧光纳米材料的可控制备提供了理论依据和重要参考。此外，所得到的 SiNPs 对硝基酚异构体具有优异的灵敏度，在 λ 和 λ 分别设定为 440nm 和 549nm 时，o-硝基酚、m-硝基酚和 p-硝基酚的线性范围分别为 0.05-600μM、20-600μM 和 0.01-600μM，相关的检出限分别为 16.7nM、6.7μM 和 3.3nM。基于 SiNP 的传感器在检测河水中的硝基酚异构体方面取得了令人满意的回收率，在实际应用中具有很大的应用前景。
