Author/Authors :
Dasary، نويسنده , , Samuel S.R. and Rai، نويسنده , , Uma S. and Yu، نويسنده , , Hongtao and Anjaneyulu، نويسنده , , Yerramilli and Dubey، نويسنده , , Madan and Ray، نويسنده , , Paresh Chandra، نويسنده ,
Abstract :
Organophosphorus agents (OPA) represent a serious concern to public safety as nerve agents and pesticides. Here we report the development of gold nanoparticle based surface enhanced fluorescence (NSEF) spectroscopy for rapid and sensitive screening of organophosphorus agents. Fluorescent from Eu3+ ions that are bound within the electromagnetic field of gold nanoparticles exhibit a strong enhancement. In the presence of OPA, Eu3+ ions are released from the gold nanoparticle surface and thus a very distinct fluorescence signal change was observed. We discussed the mechanism of fluorescence enhancement and the role of OPA for fluorescence intensity change in the presence of gold nanoparticles.
