Formation of Blue-Emitting Colloidal Si Quantum Dots through Pulsed Discharge of Si Strips in Distilled Water Medium

Longhai Zhong, Xin Gao*, Jinchao Qiao, Yan Chen, Xueying Zhang, Zeqi Xiao, Pengwan Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Si quantum dots (QDs) have received quantities of attention owing to their multiple outstanding properties, such as the size-dependent optical property, photothermal property, electronic property, and biocompatible property. Therefore, researchers have been committed to exploring preparation methods of Si QDs. In this study, we have demonstrated a novel route to prepare Si QDs through a pulsed wire discharge method using Si strips. The as-prepared samples were recovered, centrifuged, and characterized by various techniques, such as XRD, Raman spectroscopy, SEM, TEM, FTIR, UV-vis absorption, and PL spectra. Consequently, the purified samples are confirmed to be pure Si QDs in a size of 1.4-4.7 nm, with an average particle size of 2.76-2.92 nm. Furthermore, the spectral analysis reveals the blue-emitting characteristics of the obtained Si QDs owing to the small particle size. Our studies demonstrate an efficient and cost-effective approach to produce colloidal Si QDs through pulsed wire discharge, which possesses potential for large-scale production.

Original languageEnglish
Pages (from-to)4168-4175
Number of pages8
JournalJournal of Physical Chemistry C
Volume127
Issue number8
DOIs
Publication statusPublished - 2 Mar 2023

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Zhong, L., Gao, X., Qiao, J., Chen, Y., Zhang, X., Xiao, Z., & Chen, P. (2023). Formation of Blue-Emitting Colloidal Si Quantum Dots through Pulsed Discharge of Si Strips in Distilled Water Medium. Journal of Physical Chemistry C, 127(8), 4168-4175. https://doi.org/10.1021/acs.jpcc.2c07272