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Remotely tunable microfluidic platform driven by nanomaterial-mediated on-demand photothermal pumping
Guanglei Fu1, Wan Zhou2, XiuJun Li3
1Department of Chemistry and Biochemistry, University of Texas at El Paso, 500 West University Ave, El Paso, Texas 79968, USA. xli4@utep.edu and Biomedical Engineering Research Center, Medical School of Ningbo University, Ningbo, Zhejiang 315211, P. R. China.
Lab on a Chip
|May 23, 2020
Summary
A novel photothermal microfluidic pumping platform uses nanomaterials and light for on-demand fluid control. This instrument-free system enables tunable microfluidic applications and visual biomarker detection.
Area of Science:
- Microfluidics
- Nanotechnology
- Photothermal applications
Background:
- Developing on-demand microfluidic pumps and instrument-free readout methods is crucial for microfluidic technology advancement.
- Existing methods often require complex instrumentation or reagent changes, limiting practical applications.
Purpose of the Study:
- To develop a novel microfluidic platform utilizing an on-demand photothermal effect for microfluidic pumping.
- To demonstrate remote tunability of pumping performance by adjusting irradiation parameters.
- To showcase applications in substance transport and instrument-free quantitative detection.
Main Methods:
- Fabrication of a hybrid PMMA/PDMS microfluidic chip incorporating Prussian blue nanoparticles as photothermal agents.
- Utilizing laser pointer irradiation to induce on-chip photothermal effect for fluid manipulation.
- Investigating the correlation between irradiation parameters (time, intensity) and nanomaterial concentration with pumping performance.
- Demonstrating applications including gold nanoparticle transport and visual quantitative bar-chart detection of cancer biomarkers.
Main Results:
- Successfully developed an on-demand photothermal microfluidic pumping platform.
- Demonstrated remote tunability of pumping performance by altering laser irradiation parameters.
- Established a linear correlation between pumping distance, irradiation time, and nanomaterial concentration.
- Validated applications in multiplexed substance transport and instrument-free visual quantitative biomarker detection.
Conclusions:
- The photothermal microfluidic pumping platform offers a robust, remotely tunable, and instrument-free solution for microfluidic driving forces.
- Prussian blue nanoparticles exhibit high photothermal conversion efficiency for effective microfluidic pumping.
- This technology holds significant potential for diverse microfluidic applications, including point-of-care diagnostics.
