研究目的
Developing a low-cost nanoparticle based laser patterning process for fabrication of flexible electronics to overcome the limitations of traditional photolithography.
研究成果
The NLP process allows for both printing and cutting, enabling the fabrication of kirigami electronics on papers that support bending and stretching. The process is efficient enough for rapid large-area deposition and can be extended in future research for larger-area deposition, improved resolution and feature size, multi-material and multi-layer printing, and testing of other particles and substrates materials.
研究不足
The structural density is low compared to those of other processes, making the structures vulnerable to deformation and cracks.
1：Experimental Design and Method Selection:
The NLP process combines NPDS and a laser-driven method for selective deposition of nanoparticles.
2：Sample Selection and Data Sources:
Copper and silver particles were used to print patterns on paper and PET substrates.
3：List of Experimental Equipment and Materials:
Includes an air compressor, aerosol generator, nozzle, chamber, motorised stage, stage controller, laser source, optical isolator, beam expander, attenuator, reflective mirror, laser scanner, and controller.
4：Experimental Procedures and Operational Workflow:
Nanoparticles are sintered using a low-power laser as they are selectively deposited. The process allows for selective deposition, properties control of printed patterns, and flexible substrate cutting.
5：Data Analysis Methods:
SEM imaging was used to observe the thermal effects of the laser on the film morphology and porosity. The electrical properties were analysed.
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aerosol generator
TSI 3400A
TSI Incorporated
Used to mix particles with compressed air for the NLP process.
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laser source
Awave-355 nm
Advanced Optowave Corporation
Used to sinter nanoparticles during the NLP process.
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air compressor
Used in the deposition component of the NLP process.
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nozzle
Used to direct aerosolized particles to the substrate in the NLP process.
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chamber
Used to contain the aerosolized particles during the NLP process.
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motorised stage
Used to move the substrate during the NLP process.
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stage controller
Used to control the motorised stage during the NLP process.
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optical isolator
Used in the laser component of the NLP process.
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beam expander
Used in the laser component of the NLP process.
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attenuator
Used in the laser component of the NLP process.
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reflective mirror
Used in the laser component of the NLP process.
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laser scanner
Used to control the laser path during the NLP process.
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controller
Used to control the laser scanner during the NLP process.
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SEM
Used to observe the thermal effects of the laser on the film morphology and porosity.
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XRD
Used to evaluate composition changes in the materials.
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DAQ device
NI USB-6009
National Instruments Corporation
Used to gather resistance values during the bending test.
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source metre
Keithley 2450
Keithley Instruments
Used to gather resistance values during the bending test.
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CCD camera
Used to capture bending curvature during the bending test.
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UV-curable adhesive sealant
UV-5500
Skycares Inc.
Used to prevent printed sample damage caused by an external force or contact.
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