کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5009350 1462044 2017 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A flexible Ag/AgCl micro reference electrode based on a parylene tube structure
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
A flexible Ag/AgCl micro reference electrode based on a parylene tube structure
چکیده انگلیسی
In the effort of developing micro-electrochemical sensors, the miniaturization of reference electrodes has been a challenging task. In this paper, a flexible micro reference electrode with an internal electrolyte reservoir is reported. This new device is based on a unique microfabricated parylene tube structure, which is filled with Cl− rich electrolyte, into which a 50 μm diameter silver (Ag) wire covered with a 7.4 μm thick silver chloride (AgCl) layer is inserted. The distal end of the tube is filled with potassium chloride (KCl) saturated agarose gel. The Ag wire, thick AgCl layer, and internal electrolyte reservoir lead to a long operation time and a stable reference voltage. The drift over a 10-h period has been found to be less than 2 mV. The total operation time of the device has exceeded 100 h. Furthermore, the compatibility with microfabrication allows the integration of other components, leading to truly miniaturized electrochemical sensors or sensing systems. To prove this, we demonstrated a pH sensor by combining the reference electrode and an iridium oxide electrode monolithically integrated on the surface of the parylene tube.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 247, August 2017, Pages 92-97
نویسندگان
, , , , ,