Copper-Ion-Assisted Precipitation Etching Method for the Luminescent Enhanced Assembling of Sulfur Quantum Dots

[Image: see text] In this study, we report a metal-ion-assisted precipitation etching strategy that can be used to manipulate the optical properties associated with the assembling of sulfur quantum dots (S dots) using copper ions. Transmission electron microscopy confirmed that the S dots were mainl...

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Detalles Bibliográficos
Autores principales: Li, Qi-Le, Shi, Lin-Xing, Du, Ke, Qin, Yong, Qu, Shu-Jie, Xia, De-Qian, Zhou, Zhen, Huang, Zeng-Guang, Ding, Shou-Nian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7081439/
https://www.ncbi.nlm.nih.gov/pubmed/32201831
http://dx.doi.org/10.1021/acsomega.9b04465
Descripción
Sumario:[Image: see text] In this study, we report a metal-ion-assisted precipitation etching strategy that can be used to manipulate the optical properties associated with the assembling of sulfur quantum dots (S dots) using copper ions. Transmission electron microscopy confirmed that the S dots were mainly distributed within 50–80 nm and that they exhibited an ambiguous boundary. After the post-synthetic Cu(2+)-assisted modification was completed, the assisted precipitation-etching S dots (APE-S dots) were observed to exhibit a relatively clear boundary with a high fluorescence (FL) quantum yield (QY) of 32.8%. Simultaneously, the Fourier transform infrared radiation, X-ray photoelectron spectra, and time-resolved FL decay spectra were used to illustrate the improvement in the FL QY of the APE-S dots.

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