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Updated: May 1, 2026

Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors

Iridium Oxide-reduced Graphene Oxide Nanohybrid Thin Film Modified Screen-printed Electrodes as Disposable Electrochemical Paper Microfluidic pH Sensors

Published on: November 22, 2016

Active digital microfluidic paper chips with inkjet-printed patterned electrodes.

Hyojin Ko¹, Jumi Lee, Yongjun Kim

¹Department of Chemistry and Institute of Biological Interfaces, Sogang University, Seoul, 121-742, Republic of Korea.

Advanced Materials (Deerfield Beach, Fla.)

|April 15, 2014

Summary

This summary is machine-generated.

Researchers developed active, paper-based microfluidic chips using electrowetting for precise reagent transport and mixing. This technology enables digital droplet manipulation on paper, paving the way for future point-of-care diagnostics.

Keywords:

active paper open chip active transport electrowetting microfluidic system paper chip

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Area of Science:

Microfluidics
Biotechnology
Materials Science

Background:

Traditional microfluidic devices often rely on passive capillary forces, limiting precise liquid control.
Paper-based diagnostics offer a low-cost platform but struggle with active fluid manipulation.

Purpose of the Study:

To fabricate and demonstrate active, paper-based microfluidic chips for controlled reagent transport and mixing.
To utilize electrowetting for digital droplet actuation on a paper substrate.

Main Methods:

Fabrication of paper-based microfluidic chips with integrated electrodes.
Implementation of electrowetting-based digital droplet manipulation for liquid transport.
Programming specific trajectories for droplet movement and mixing.

Main Results:

Successful demonstration of active, paper-based microfluidic chips.
Precise transport and mixing of digital droplets using electrowetting.
Movement of droplets along programmed paths on the paper substrate.

Conclusions:

Electrowetting-driven microfluidics on paper offer an active alternative to passive methods.
This technology facilitates controlled reagent handling for potential point-of-care applications.
Low-cost paper substrates combined with active actuation show promise for future diagnostic devices.