研究目的
To develop a novel method for fabricating graphene sensors inside PDMS channels for biomedical applications, eliminating the need for multiple wetting and drying steps and the use of polymer support like PMMA.
研究成果
A novel method for fabricating graphene sensors inside PDMS microchannels was developed, offering a cleaner, time-saving, and scalable approach for transferring graphene. The method eliminates the need for polymer support and multiple wetting and drying steps, producing high-quality monolayer graphene suitable for biomedical applications.
研究不足
The method's scalability and the quality of graphene obtained may be affected by the bonding process and the etching rate controlled by the flow rate of the etchant.
1：Experimental Design and Method Selection:
The method involves bonding a graphene/copper stack on a PDMS surface using mechanical pressure and temperature, then bonding this to another PDMS substrate containing a microchannel. Etchant is flowed through the microchannel to etch the copper and obtain graphene on PDMS.
2：Sample Selection and Data Sources:
Graphene is grown on 25 microns thick copper foil using chemical vapor deposition.
3：List of Experimental Equipment and Materials:
PDMS (Dow Corning, Sylgard-184 kit), Copper Etchant (Ammonium Persulphate solution), SU-8 molds, Silicon wafer.
4：Experimental Procedures and Operational Workflow:
PDMS substrate and microchannel cover preparation, graphene preparation, bonding process, etching process, and characterization using optical images, SEM, and Raman spectroscopy.
5：Data Analysis Methods:
Optical and electrical characterization, SEM imaging, and Raman spectroscopy analysis.
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