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Silicon quantum dots (SiQDs) have emerged as a promising class of nanomaterials due to their biocompatibility and tunable photoluminescence. In this study, we report a gram-scale, one-pot synthesis of methoxy-functionalized SiQDs (SiQDs–OMe), along with comprehensive characterization of their optical properties and stability in aqueous environments. FT-IR analysis confirmed successful surface modification with methoxy groups. UV–Vis and PL spectra demonstrated strong emission under UV excitation, while time-resolved photoluminescence revealed multi-exponential decay behavior, indicating both radiative and surface-related non-radiative pathways. Notably, SiQDs–OMe retained more than 50% of their initial quantum yield after one week in water, highlighting their potential for bioimaging and sensing applications in aqueous media.

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Scalable Synthesis of Water-Soluble Silicon Quantum Dots by One-Pot

  • 会议论文

  • 发表日期：

    2026年

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  • Eunbi Choi,
  • Honglae Sohn

摘要

Silicon quantum dots (SiQDs) have emerged as a promising class of nanomaterials due to their biocompatibility and tunable photoluminescence. In this study, we report a gram-scale, one-pot synthesis of methoxy-functionalized SiQDs (SiQDs–OMe), along with comprehensive characterization of their optical properties and stability in aqueous environments. FT-IR analysis confirmed successful surface modification with methoxy groups. UV–Vis and PL spectra demonstrated strong emission under UV excitation, while time-resolved photoluminescence revealed multi-exponential decay behavior, indicating both radiative and surface-related non-radiative pathways. Notably, SiQDs–OMe retained more than 50% of their initial quantum yield after one week in water, highlighting their potential for bioimaging and sensing applications in aqueous media.