Scholarlink

We report on a porous silicon-based distributed Bragg reflector (DBR PS) sensor exhibiting strong luminescence and rapid response toward vapor-phase simulants of chemical warfare agents (CWAs). The engineered multilayer DBR PS structures display enhanced photoluminescence (PL) centered at 680 nm due to constructive interference effects. Exposure to dimethyl methylphosphonate (DMMP), tetraethyl phosphate (TEP), and diethyl ethylphosphonate (DEEP) results in swift and pronounced PL quenching, observable in real time. The sensing mechanism is attributed to surface oxidation of silicon nanocrystallites, forming a thin oxide shell that suppresses emission. Compared to conventional single-layer porous silicon, the DBR configuration achieves markedly higher sensitivity and faster detection, demonstrating potential for compact, high-performance CWA monitoring systems.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A Luminescent Porous Silicon DBR Platform for Sensitive Detection of Chemical Warfare Agent Simulant Vapors

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Honglae Sohn

摘要

We report on a porous silicon-based distributed Bragg reflector (DBR PS) sensor exhibiting strong luminescence and rapid response toward vapor-phase simulants of chemical warfare agents (CWAs). The engineered multilayer DBR PS structures display enhanced photoluminescence (PL) centered at 680 nm due to constructive interference effects. Exposure to dimethyl methylphosphonate (DMMP), tetraethyl phosphate (TEP), and diethyl ethylphosphonate (DEEP) results in swift and pronounced PL quenching, observable in real time. The sensing mechanism is attributed to surface oxidation of silicon nanocrystallites, forming a thin oxide shell that suppresses emission. Compared to conventional single-layer porous silicon, the DBR configuration achieves markedly higher sensitivity and faster detection, demonstrating potential for compact, high-performance CWA monitoring systems.