کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
740230 1462101 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chemical imaging of the concentration profile of ion diffusion in a microfluidic channel
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Chemical imaging of the concentration profile of ion diffusion in a microfluidic channel
چکیده انگلیسی

The chemical imaging sensor is a device to visualize the spatial distribution of chemical species based on the principle of LAPS (light-addressable potentiometric sensor), which is a field-effect chemical sensor based on semiconductor. In this study, the chemical imaging sensor has been applied to investigate the ion profile of laminar flows in a microfluidic channel. The chemical images (pH maps) were collected in a Y-shaped microfluidic channel while injecting HCl and NaCl solutions into two branches. From the chemical images, it was clearly observed that the injected solutions formed laminar flows in the channel. In addition, ion diffusion across the laminar flows was observed, and the diffusion coefficient could be derived by fitting the pH profiles to the Fick's equation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 189, December 2013, Pages 240–245
نویسندگان
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