Laser Patterning of Nanocarbon Materials on Polymeric Substrates
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Solution Overview
Problem
The challenge in laser-induced nanocarbon (LINC) formation is the lack of understanding of process-structure-property relationships, which hinders controlled and repeatable production of patterns with predetermined properties, such as morphological, chemical, and electrical properties, due to unclear transitional levels and thresholds in processing parameters.
Innovation Solution
A method involving controlled application of a laser beam to a polymeric substrate, varying the beam's fluence and speed in a predetermined pattern to achieve specific transitions in chemical composition, carbon atomic structure, or morphology, creating gradients in properties like sp2-hybridized graphitic carbon and graphene domains, enabling precise control over the carbonized material's properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If laser fluence and speed are controlled to predefined levels, then manufacturing precision of carbonized material properties is improved, but device complexity increases
Solution Approach 1:
The patent applies parameter changes by controlling laser fluence and scanning speed to predefined levels to achieve desired carbonized material properties. The system varies laser processing parameters (fluence, speed) to control chemical composition, carbon atomic structure, and morphology, resolving the contradiction by using systematic parameter control to achieve precision while managing complexity through predefined parameter sets
Solution Approach 2:
The patent implements feedback control by monitoring laser fluence and scanning speed, and adjusting them to maintain predefined levels. The control system uses feedback to ensure consistent carbonized material properties by continuously regulating laser parameters based on process conditions, thereby achieving manufacturing precision while managing system complexity through closed-loop control
2Manufacturing precision
If laser fluence and speed are varied to achieve predetermined transitions, then manufacturing precision is improved, but productivity decreases
Solution Approach 1:
The patent applies preliminary action by pre-defining the laser fluence and speed profiles required to achieve specific transitions in carbonized material properties. The processing parameters are predetermined based on desired outcomes, allowing the system to execute precise transitions without real-time optimization, thereby maintaining manufacturing precision while improving productivity through pre-planned parameter sequences
Solution Approach 2:
The patent uses dynamics by varying laser fluence and scanning speed during the carbonization process to achieve different material properties in different regions. The system dynamically adjusts parameters along the laser path to create gradients in chemical composition, atomic structure, and morphology, achieving precise control of transitions while maintaining reasonable processing speeds through time-varying parameter control
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 approach allows for the creation of carbonized materials with tunable properties, such as electrical conductivity, by controlling fluence and speed, resulting in morphologies like nanostructured graphene domains, anisotropic cellular networks, and aligned nanofibers, enhancing the scalability and cost-effectiveness of flexible device fabrication.
Implementation Method 1
Laser carbonization of polymers (for example, a polyimide) is an emerging technique that enables directly patterning conductive carbon electrodes
Implementation Method 2
Lasers may be used to locally carbonize commercial polymers, such as polyimide, directly on flexible substrates
Data Source
AI summary
A method of producing a carbonized material includes applying a beam of electromagnetic radiation from a laser source to a polymeric substrate, varying the position of the beam to traverse over at least a portion of a surface of the polymeric substrate in a predetermined pattern, and controlling a fluence of the beam and speed of movement of the beam traversing over the at least a portion of the surface of the polymeric substrate as a function of position on the surface to one or more predefined levels effluence and speed of movement of the beam to control at least one property of the produced carbonized material.