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Low-cost fabrication of paper-based microfluidic devices by one-step plotting
Jinfang Nie1, Yun Zhang, Liwen Lin
1College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China.
Analytical Chemistry
|August 14, 2012
Summary
A simple, one-step method creates paper-based microfluidic devices using permanent markers and templates. This rapid, low-cost technique enables easy fabrication of diagnostic tools for prostate-specific antigen detection, even in resource-limited settings.
Area of Science:
- Microfluidics
- Biomedical Engineering
- Materials Science
Background:
- Paper-based microfluidic devices offer a low-cost platform for diagnostics.
- Existing fabrication methods can be complex and time-consuming.
- There is a need for rapid, accessible methods for creating these devices.
Purpose of the Study:
- To develop a facile, one-step method for fabricating paper-based microfluidic devices.
- To demonstrate the utility of these devices for biomarker detection.
- To validate the method's applicability in resource-limited environments.
Main Methods:
- Utilized commercially available permanent markers and metal templates for pattern plotting on paper.
- Developed a single-step plotting process completed within one minute.
- Incorporated hydrophobic ink barriers to define hydrophilic flow paths and test zones.
- Employed dot-immunogold staining assays with gold enhancement for prostate-specific antigen (PSA) detection.
- Compared results with commercial chemiluminescence immunoassay for validation.
Main Results:
- Successfully fabricated paper-based microfluidic devices in a single step.
- Demonstrated effective colorimetric and quantitative detection of PSA using fabricated test zones.
- Achieved comparable results to commercial assays, validating practical application feasibility.
- Showcased the potential for transparent adhesive tape to protect assay surfaces.
Conclusions:
- The one-step plotting method provides a rapid, inexpensive, and skill-free approach to paper-based microfluidic device fabrication.
- This technique is highly suitable for point-of-care diagnostics, especially in remote or resource-limited settings.
- The developed method holds significant potential for widespread adoption in small laboratories and private clinics.
