Details

Autor(en) / Beteiligte

• Feng, Xiaowei
• Qin, Yuanlong
• Sui, Rui
• Wang, Guo
• Zhang, Xinyu
• Liu, Xinyu
• Pei, Jiajing
• Liu, Di
• Chen, Zhengbo

Titel

CH3I sensing using yttrium single atom-doped perovskite nanocrystals

Ist Teil von

• Nano research, 2023-07, Vol.16 (7), p.10429-10435

Ort / Verlag

Beijing: Tsinghua University Press

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Nanocrystals (NCs) of cesium lead halide perovskites are optically unstable, which prevents their use in optical sensors. The combination of perovskite NCs and metal single atoms (SAs) may be a good solution to this issue. Unfortunately, depositing metal SAs on perovskite NCs remains a challenge due to relative weak metal-halide bonds. Herein, we present that, via a photo assisted method using cesium lead halide perovskite NCs as host material to anchor Y single atoms, we successfully synthesize Y SA anchored CsPbBr 3 NCs (Y-SA/CsPbBr 3 NCs) with outstanding fluorescence stability through the formation of two Y−O bonds and two Y−Br bonds. In comparison to bare CsPbBr 3 NCs, Y-SA/CsPbBr 3 NCs possess more stable optical characteristics. The as-synthesized Y-SA/CsPbBr 3 NCs can be employed as a colorimetric platform to perform rapid CH 3 I sensing. Detection limit of 0.044 ppm is exhibited in this approach with excellent anti-interference performance. The Y-SA/CsPbBr 3 NCs-based system has been applied to the detection of CH 3 I in sweet potato samples with satisfying results.