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Microembossing: A Convenient Process for Fabricating Microchannels on Nanocellulose Paper-Based Microfluidics
Published on: October 6, 2023
Transferring vertically aligned carbon nanotubes onto a polymeric substrate using a hot embossing technique for
A Mathur1, S S Roy, J A McLaughlin
1Nanotechnology and Integrated Bio-Engineering Centre, School of Electrical and Mechanical Engineering, University of Ulster, Newtownabbey BT37 0QB, UK.
Journal of the Royal Society, Interface
|February 12, 2010
Summary
Hot embossing successfully transferred aligned carbon nanotubes (CNTs) onto poly-methyl-methacrylate (PMMA) microfluidic channels. This technique enabled efficient microparticle filtration, paving the way for point-of-care diagnostic devices.
Area of Science:
- Materials Science
- Microfluidics
- Nanotechnology
Background:
- Vertically aligned carbon nanotubes (CNTs) offer unique properties for microfluidic applications.
- Efficient transfer of CNTs into microfluidic devices is crucial for their integration into functional systems.
Purpose of the Study:
- To investigate the hot embossing method for transferring CNTs onto poly-methyl-methacrylate (PMMA) microfluidic channels.
- To optimize hot embossing parameters for successful CNT transfer.
- To demonstrate the application of CNT-functionalized microfluidic channels for microparticle filtration.
Main Methods:
- CNTs were synthesized using microwave plasma-enhanced chemical vapour deposition (MPECVD).
- Hot embossing was employed to transfer CNTs onto PMMA microfluidic channels, with parameters optimized at 115°C, 1 kN force, and 2 min duration.
- Raman spectroscopy and Scanning Electron Microscopy (SEM) were used for microstructural analysis.
- Microfluidic channels were tested for filtering PMMA microparticles (approx. 10 µm diameter).
Main Results:
- Optimal hot embossing parameters were identified for complete transfer of aligned CNTs.
- Microstructural analysis confirmed the integrity of CNTs after the transfer process.
- Successful filtration of PMMA microparticles, mimicking red blood cells, was achieved using the functionalized microfluidic channels.
Conclusions:
- Hot embossing is an effective method for transferring aligned CNTs into PMMA microfluidic channels.
- The developed microfluidic system demonstrates potential for blood filtration applications.
- This research lays the groundwork for microfluidic-based point-of-care devices for bio-molecule detection and filtration.
