Strip-Shaped Graphene Layer via Carbon Nanotube Template Patterning
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Solution Overview
Problem
Current methods lack an efficient approach for producing a strip-shaped graphene layer, which is essential for applications in semiconductor devices due to graphene's excellent electrical and thermal properties.
Innovation Solution
A method involving the deposition of a graphene film on a substrate, adherence of a carbon nanotube structure with parallel segments and strip-shaped gaps, application of voltage and controlled temperature to remove parts of the graphene film, and subsequent separation to obtain a strip-shaped graphene layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to produce graphene layers, then graphene can be obtained, but strip-shaped graphene layers cannot be efficiently produced
Solution Approach 1:
The patent applies segmentation by using a carbon nanotube structure with multiple parallel segments separated by strip-shaped gaps. This segmented structure serves as a template that selectively removes portions of the graphene film, thereby producing strip-shaped graphene layers. The segmentation of the carbon nanotube structure directly translates to the segmentation of the final graphene product into useful strip shapes.
Solution Approach 2:
The patent employs the extraction principle by removing specific portions of the graphene film that contact the carbon nanotube segments through voltage application and temperature control. This selective removal process extracts the unwanted portions of the graphene, leaving behind the desired strip-shaped graphene layers with precise geometry.
2Manufacturing precision
If a carbon nanotube structure with parallel segments and strip-shaped gaps is adhered to the graphene film, then strip-shaped graphene layers can be produced, but the process complexity increases
Solution Approach 1:
The carbon nanotube structure serves multiple functions simultaneously: it acts as a template for defining the strip shape, provides a mechanism for selective graphene removal through voltage application, and maintains structural integrity during the processing. This multi-functionality reduces the need for separate components and simplifies the overall device architecture despite the added complexity of the nanotube structure.
Solution Approach 2:
The carbon nanotube structure acts as an intermediary element between the graphene film and the desired strip-shaped output. It mediates the transformation by providing a controlled interface that enables selective removal of graphene portions through voltage and temperature, thereby achieving precise strip shaping without requiring complex direct patterning methods.
3Manufacturing precision
If voltage and temperature are applied to remove parts of the graphene film, then strip-shaped graphene layers are formed, but energy consumption increases
Solution Approach 1:
The patent applies local quality by concentrating the energy input (voltage and temperature) specifically at the interfaces between the carbon nanotube segments and the graphene film. This localized energy application enables precise removal of graphene portions only where needed, rather than heating or energizing the entire graphene film, thereby reducing overall energy consumption while maintaining manufacturing precision.
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting voltage and temperature parameters to control the removal process. By optimizing these parameters, the process achieves efficient graphene removal with minimal energy waste. The parameter changes enable precise control over which portions of the graphene are removed, achieving strip-shaped layers with controlled energy input.
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
This method effectively produces a strip-shaped graphene layer with high conductivity and mechanical integrity, suitable for use in semiconductor devices, enhancing their performance.
Implementation Method 1
applying a voltage to the carbon nanotube film structure (40) and adjusting the temperature of the substrate (20) to remove parts of the graphene film (30) contacting the carbon nanotube segments (411)
Data Source
AI summary
A method for making a strip shaped graphene layer includes the following steps. First, a graphene film is located on a surface of a substrate is provided. Second, a carbon nanotube structure is disposed on the graphene film. The carbon nanotube structure includes a plurality of carbon nanotube segments and a number of strip-shaped gaps between the adjacent carbon nanotube segments. Third, the graphene film exposed by the strip-shaped gaps is removed by applying a voltage to the carbon nanotube segments and heating the substrate.