کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
742351 1462113 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Theoretical analysis of a parallel-plate electroosmotic hydrogel actuation and sensing platform
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Theoretical analysis of a parallel-plate electroosmotic hydrogel actuation and sensing platform
چکیده انگلیسی

This paper addresses the dynamic electrical response of a charged or uncharged hydrogel that is sandwiched between a bottom fixed plate and a top floating, parallel plate. We demonstrate how this configuration might be adopted as a novel chemical- or bio-sensing platform. It might also be used for nano-positioning, or for studying the rheology and physiochemical characteristics of hydrogels. Here, the gel is modelled as a continuum composite comprising a porous, charged, elastic skeleton saturated by an aqueous electrolyte. Electrostatics satisfy the Debye–Hückel approximation, with zero-slip boundary conditions between the skeleton, solvent, and walls. For large channel gaps, the steady electric-field-induced displacement of the top plate is proportional to the difference between the top- and bottom-wall ζ-potentials. Under oscillatory electrical stimulation, resonant peaks, with amplitudes from picometers to micrometers, reflect hydrogel elasticity and charge density. Such displacements are within the detection range of modern interferometric displacement sensors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 177, February 2013, Pages 334–343
نویسندگان
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