研究目的
To fabricate a highly conductive, mechanically stable, flexible, and stretchable electrode for wearable electronics using a feasible laser direct writing (LDW) process.
研究成果
The LDW process is efficient for fabricating skin-compatible metal electrodes with excellent conductivity, transparency, and mechanical-electrical stability. The micro-spring structured electrodes show great potential for wearable electronics, with applications demonstrated in electric-thermal physical therapy devices.
研究不足
The study does not address the long-term durability of the electrodes under continuous use or the potential for large-scale production challenges.
1：Experimental Design and Method Selection:
The study employs a laser direct writing (LDW) process to fabricate micro-spring structured metal electrodes. The process involves printing reverse templates on Si substrates and electro-deposition to deposit metal ions (Ni, Ag) on the exposed conductive substrate surface.
2：Sample Selection and Data Sources:
Conductive silicon substrates are used as the base for the LDW process. The metal electrodes are transferred to flexible polyethylene terephthalate (PET) or polydimethylsiloxane (PDMS) substrates.
3：List of Experimental Equipment and Materials:
A 1064 nm IR laser (JPT Electronics), SEM (HITACHI SU8010), AFM (Dimension Icon, Bruker), optical microscope (CMM-55E), four-probe tester (ST2263), UV-2550 spectrophotometer (Shimadzu), and infrared camera (VarioCAM, InfraTec).
4：Experimental Procedures and Operational Workflow:
The LDW process involves curing a polymer on a conductive silicon substrate, removing uncured parts with DI water, electro-depositing metal ions, and transferring the metal structures to flexible substrates.
5：Data Analysis Methods:
The performance of the metal electrodes is evaluated based on sheet resistance, transmittance, and mechanical-electrical stability under stretching and bending.
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UV-2550 spectrophotometer
UV-2550
Shimadzu
Used for testing the transmittance of the metal electrodes.
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Infrared camera
VarioCAM
InfraTec
Used for measuring the contour temperature map and infrared thermal imaging of the electric-thermal device.
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SEM
SU8010
HITACHI
Used for analyzing the surface morphology of the metal electrodes.
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AFM
Dimension Icon
Bruker
Used for measuring the surface roughness of the metal electrodes.
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IR laser
1064 nm
JPT Electronics
Used for curing polymer on conductive silicon substrates in the LDW process.
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Optical microscope
CMM-55E
Used for obtaining optical images of the metal electrodes.
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Four-probe tester
ST2263
Used for testing the sheet resistance of the metal electrodes.
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