کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
747323 894515 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Sensors of volatile compounds based on the dielectric relaxation of organic molecules
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Sensors of volatile compounds based on the dielectric relaxation of organic molecules
چکیده انگلیسی

Organic molecules can have their dielectric relaxation characteristics altered by their exposition to volatile substances and when immobilized in a porous silica substrate, they exhibit a very large number of active sites available for interaction with molecules of volatile organic compounds (VOCs). Here, we propose to exploit these properties for the development of chemical sensors by showing that the changes in the total capacitance of the system resulting from the adsorption of the VOCs can be unequivocally associated to the nature of the compound tested, so that the overall characteristics of any one of sensors constructed in this manner can be closely related to the corresponding molecules that were immobilized. Considering the stability of the electrical response of the system, its sensitivity towards different volatile compounds and the simplicity of the procedure for immobilizing molecules, this technique appears a promising manner of manufacturing devices that could be used in the development of competitive chemical sensors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 115, Issue 1, 23 May 2006, Pages 542–546
نویسندگان
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