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A Microfluidic-based Electrochemical Biochip for Label-free DNA Hybridization Analysis

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Published on: September 10, 2014

Biochips and other microtechnologies for physiomics.

Aeraj ul Haque¹, Mohammad Rameez Chatni, Gang Li

¹Purdue University, Department of Agricultural & Biological Engineering, Physiological Sensing Facility, Bindley Bioscience Research Center, West Lafayette, IN 47907, USA. ahaque@purdue.edu

Expert Review of Proteomics

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Summary

This review covers microtechnologies like biochips and sensors for cellular physiology. Optical sensing methods offer advantages over traditional electrochemical techniques for physiological sensing in lab-on-a-chip devices.

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A Microfluidic-based Electrochemical Biochip for Label-free DNA Hybridization Analysis

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Area of Science:

Biomedical Engineering
Analytical Chemistry
Cellular Physiology

Background:

Microelectrodes are established tools for measuring various physiological parameters like pH, oxygen, and neurotransmitters.
Electrochemical sensing has been the primary method for in-situ physiological measurements.
Recent advancements in optoelectronics have enabled new optical sensing techniques.

Purpose of the Study:

To review microtechnologies for cellular physiology applications.
To compare electrochemical and optical sensing methods.
To predict future trends in physiological sensing.

Main Methods:

Review of microtechnologies including biochips, electrochemical sensors, and optical fiber sensing (optrodes).
Analysis of microelectrode applications in measuring electrophysiology, oxygen, nitric oxide, neurotransmitters, and pH.
Examination of indicator-based optrodes with fluorescence lifetime measurement.

Main Results:

Microelectrodes are versatile for measuring multiple physiological parameters.
Optical fiber sensing techniques are emerging as viable alternatives to electroanalytical chemistry.
Optrode techniques offer advantages such as miniaturization, faster response times, no analyte consumption, and lower operational costs.

Conclusions:

Optical luminescence lifetime sensing presents a promising alternative for physiological sensing.
Lab-on-a-chip devices will increasingly integrate both electrochemical and optical sensing components.
Future trends point towards enhanced miniaturization and efficiency in physiological monitoring technologies.