PMMA-Coated Graphene Transfer via Polymer Sponge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for transferring large-area graphene to various substrates are inefficient and limited, hindering research and applications due to the lack of established practical technologies for convenient and cost-effective graphene transfer.
Innovation Solution
A method involving PMMA-coated graphene, using a polymer sponge and water, allows for quick and easy transfer of graphene from a source substrate to a target substrate, providing flexibility in choosing substrate types and maintaining graphene integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional graphene transfer methods are used, then graphene can be transferred to substrates, but the process is time-consuming and inefficient
Solution Approach 1:
The patent uses a polymer sponge as an intermediary carrier to hold PMMA-coated graphene. The sponge's porous structure allows water to penetrate and release the graphene onto the target substrate. This intermediary approach eliminates complex conventional transfer procedures and reduces transfer time to mere seconds while maintaining graphene integrity.
2Ease of manufacture
If established transfer technologies are available, then the transfer process would be convenient, but no such established technology exists yet
Solution Approach 1:
The polymer sponge carrier with PMMA-coated graphene serves as a universal transfer medium that can be applied to diverse target substrates including flexible and rigid surfaces. The method provides both ease of manufacture through simple water-based transfer and high adaptability to various substrate types, resolving the contradiction between convenience and versatility.
3Loss of time
If rapid transfer is achieved, then transfer time is reduced, but transfer reliability may be compromised
Solution Approach 1:
The graphene is pre-coated with PMMA and mounted on the polymer sponge before transfer. This preliminary preparation ensures that during the rapid water-based transfer process, the graphene remains securely held and maintains its integrity. The PMMA coating acts as a protective layer that prevents graphene damage during the quick transfer, thus maintaining reliability while achieving speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables rapid, cost-effective, and reliable transfer of graphene to diverse substrates, enhancing research flexibility and experimental capabilities by simplifying the process and reducing transfer time to mere seconds.
Implementation Method 1
A method involving PMMA-coated graphene, using a polymer sponge and water, allows for quick and easy transfer of graphene from a source substrate to a target substrate
Data Source
AI summary
A method for transferring PMMA-coated graphene can transfer graphene to a wide variety of different substrate surfaces. It transfers graphene to different surfaces by using of Poly(methyl methacrylate) (PMMA), polymer such as sponge, and deionized (DI) water. This method comprises easy steps of coating CVD graphene with a layer of PMMA; placing the PMMA-coated CVD graphene onto a polymer to form a PMMA-coated CVD graphene on the surface of a polymer; putting this polymer with PMMA-coated CVD graphene in DI water, and finally scooping up the PMMA-coated CVD graphene with one target substrate. In this way, it transfers the CVD graphene to a target substrate surface.