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http://dx.doi.org/10.13160/ricns.2010.3.4.202

Detection of Nitroaromatic Compounds with Functionalized Porous Silicon Using Quenching Photoluminescence  

Cho, Sungdong (Department of Chemistry, Chosun University)
Publication Information
Journal of Integrative Natural Science / v.3, no.4, 2010 , pp. 202-205 More about this Journal
Abstract
Nanocrystalline porous silicon surfaces have been used to detect nitroaromatic compounds in vapor phase. The mode of photoluminescence is emphasized as a sensing attitude or detection technique. Quenching of photoluminescence from nanocrystalline porous surfaces as a transduction mode is measured upon the exposure of nitroaromatic compounds. Reversible detection mode for nitroaromatics is, too, observed. To verify the detection afore-mentioned, photoluminescent freshly prepared porous silicons are functionalized with different groups. The mechanism of quenching of photoluminescence is attributed to the electron transfer behaviors of quantum-sized nano-crystallites in the porous silicon matrix to the analytes(nitroaromatics). An attempt has been done to prove that the surface-derivatized photoluminescent porous silicone surfaces can act as versatile substrates for sensing behaviors due to having a large surface area and highly sensitive transduction mode.
Keywords
Detection; porous silicon; photoluminescence; quenching;
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