A Simple and Scalable Fabrication Method for Organic Electronic Devices on Textiles
March 13th, 2017
In this paper, we present a protocol to selectively deposit organic materials on textiles, which allows for the direct integration of organic electronic devices with wearables. The fabricated devices can be fully integrated in textiles, respecting their mechanical appearance and enabling sensing capabilities.
The overall goal of this patterning procedure is to selectively deposit organic electroactive materials on textiles, which enables the fabrication of wearable organic electronic devices directly on clothing. This method can help to answer a key question in the field of wearable electronics, especially how to seamlessly integrate electronics with clothing to interact efficiently with the human body. The main advantage of this technique stems from elastic capability of textiles, which allows to worn this textiles comfortably in the close contact with the skin.
First an idea of this method. When we look for a nontraditional way of combining organic electronics with textiles platform in a cost-efficient and industry scalable manner. This technique was inspired by old Japanese kimono dying technique, which we adapted for today's micro-fabrication tools and environment.
To begin the procedure, use a laser cutter to cut a pre-designed electrode pattern into a 125-micrometer-thick polyamide sheet to form a mask. Then take a 300-micrometer-thick sheet of 100%interlock knit polyester fabric with a knit direction stretch capability of up to 50%Secure this to a flat, portable surface. In a fume hood, use an automatic tape casting tool to coat the polyamide mask with a polydimethylsiloxane formulation at six meters per minute to a wet film thickness of 200 micrometers.
Gently place the fabric on the PDMS-coated mask and allow the PDMS to be absorbed into the textile structure for 10 minutes. Anneal the PDMS at 100 degrees Celsius for 10 minutes or at 60 degrees Celsius for 20 minutes for heat-sensitive fabrics. In the fume hood, mix together 80 milliliters of PEDOT:PSS dispersion, 20 milliliters of ethylene glycol, 40 microliters of 4-dodecylbenzenesulfonic acid, and one milliliter of 3-propylmethacrylate.
Then place the mixture to stir on a magnetic stirrer. Brush coat the PEDOT:PSS mixture over the masked fabric until the electrode pattern is coated with about one milliliter of the mixture per centimeter squared and appears to be uniform in color. The brush coating step of PEDOT:PSS is the critical step.
The sheet resistance of the pattern needs to be about 230 ohm square. Remove the polyamide mask then cure the electrode pattern at 110 degrees Celsius for one hour or at 60 degrees Celsius for two hours for heat-sensitive fabrics. To fabricate cutaneous electrodes from PEDOT:PSS electrodes on textiles, first prepare a gel mixture composed of 60%by volume ionic liquid, 35%crosslinking agent, and 5%photoinitiator.
In a fume hood, coat the electrodes with 20 microliters per centimeter squared of the ionic liquid, and then add 25 microliters per centimeter squared of the gel mixture by drop casting. Expose the coated electrodes to 365-nanometer UV light for 10 to 15 minutes to solidify the gel and form the cutaneous electrodes. To fabricate capacitive sensors from PEDOT:PSS electrodes on textiles, in a fume hood, apply 10 to one PDMS formulation to the fabric.
Use a squeegee to evenly spread the PDMS formulation over the electrodes to remove any excess. Anneal the insulating layer of the PDMS at up to 100 degrees Celsius for at least 10 minutes, depending on the heat tolerance of the fabric, to form the capacitive sensors. Using this method, PEDOT:PSS electrodes were patterned on knit and woven textiles.
The patterning resolution of knitted polyester is greater than one millimeter. Narrower resolutions can be obtained on tightly knit or woven textiles. The electrodes patterned on knit textiles function as stretch sensors with no further modifications.
When the fabric is stretched, the twisting of the conductive fibers results in a change in the resistivity. An organic electrochemical transistor array was patterned onto a woven nylon ribbon, a wearable sweat sensor, also with no further modifications. The addition of an ionic liquid in gel allowed the electrodes to function as wearable cutaneous electrodes for electro-physiological monitoring.
Alternatively, the addition of an insulating PDMS layer created capacitor sensors. Touching the electrodes causes a capacitance change, allowing fabrication of a wearable keyboard. The combination of close-fitting textiles with organic and soft electrodes offers an improved communication channel with the human body while compared to the traditional solid-state electronic device.
This method allows for the future customization of existing garments with the smart electronic devices. However, one of the critical and in some cases limiting points of this technology is that materials, organic materials'durability and wearable conditions.
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Overview
This study presents a novel protocol for selectively depositing organic electroactive materials on textiles, facilitating the integration of wearable organic electronic devices directly into clothing. This method enhances the interaction between electronics and the human body while maintaining comfort and mechanical integrity.
Key Study Components
Area of Science
- Wearable electronics
- Organic electronics
- Textile engineering
Background
- Integration of electronics with textiles is a key challenge in wearable technology.
- Traditional methods often compromise the comfort and aesthetics of clothing.
- This technique draws inspiration from historical textile practices.
- It aims to create a cost-effective and scalable solution for wearable devices.
Purpose of Study
- To develop a method for seamless integration of organic electronics into textiles.
- To enhance the functionality of clothing through embedded sensing capabilities.
- To explore a nontraditional approach to combining electronics with textiles.
Methods Used
- Adaptation of traditional kimono dyeing techniques for modern micro-fabrication.
- Selective deposition of organic materials on textile substrates.
- Evaluation of the mechanical properties of the integrated textiles.
- Testing the comfort and wearability of the final products.
Main Results
- Successful integration of organic electronic devices into textiles.
- Maintained mechanical appearance and comfort of the textiles.
- Enabled new sensing capabilities in wearable applications.
- Demonstrated scalability and cost-effectiveness of the method.
Conclusions
- This method represents a significant advancement in wearable electronics.
- It provides a framework for future research in textile-integrated devices.
- The approach can lead to more efficient interactions between technology and the human body.
Frequently Asked Questions
Executive Industry Relevance
This method enables scalable integration of organic electronics into textiles, addressing a key challenge in wearable device development: achieving seamless electronic-textile interfaces without compromising comfort or mechanical properties. By adapting historical patterning techniques for modern micro-fabrication, it offers a cost-effective pathway for producing wearable sensors and electrodes directly on clothing. This supports early-stage discovery of bio-integrated systems where mechanical conformity and user compliance are critical for data fidelity and longitudinal monitoring.
Strategic Applications in Biopharma R&D
Early Discovery & Target Validation
- Scientific Value: Enables interrogation of physiological signals through conformal textile-integrated electrodes that maintain skin contact during movement.
- Operational Value: Supports hypothesis testing in ambulatory settings by preserving natural biomechanics during data collection.
Screening & Assay Development
- Scientific Value: Provides standardized, patterned organic electronic platforms for reliable biomarker signal acquisition from physiological surfaces.
- Operational Value: Facilitates assay reproducibility through scalable mask-based deposition and uniform material coating across textile substrates.
Translational & Preclinical Research
- Scientific Value: Supports translational biomarker validation by enabling continuous, non-invasive monitoring in physiologically relevant, free-living conditions.
- Operational Value: Bridges discovery and preclinical workflows via wearable formats that reduce stress-induced artifacts in animal and human studies.
Pipeline & Workflow Integration
The method fits within the discovery continuum from early biological hypothesis testing to preclinical validation, particularly for applications requiring longitudinal, ambulatory physiological monitoring where electrode-tissue interface stability is paramount.
- Discovery Biology: Enables mechanical and electrical interfacing with biological systems through stretchable, skin-conformal electrodes that maintain signal integrity during dynamic movement.
- Screening: Delivers quantitative, resistivity-based readouts from textile-integrated sensors that respond to physiological strain, supporting comparative condition analysis.
- Analytics: Generates measurable shifts in electrical resistance and capacitance that correlate with physiological states, enabling statistical comparison across experimental groups.
- Translational Research: Supports continuity to preclinical studies by allowing identical wearable formats to be used across model systems, reducing translational variability.
- Enterprise Reuse: Represents a platform capability for repeated use across multiple discovery programs requiring conformal, wearable bio-interfaces.
Operational & Enterprise Impact
- Scientific Value: Enhances predictive confidence by reducing mechanical mismatch between sensor and tissue, minimizing motion artifacts in ambulatory data.
- Operational Value: Ensures standardization and scalability through mask-defined patterning and solution-based deposition compatible with roll-to-roll textile processing.
- Strategic Value: Improves go/no-go decisions by enabling early assessment of target engagement in naturalistic use conditions, reducing late-stage failure due to poor compliance.
- Portfolio Impact: Supports risk-adjusted advancement by validating target modulation in physiologically relevant, wearable formats prior to invasive or bulky alternatives.
Implementation Considerations
- Requires expertise in organic electronics, textile handling, and micro-patterning techniques including laser cutting and tape casting.
- Needs access to fume hoods, magnetic stirrers, UV curing units, and thermal annealing equipment for material processing.
- Demands cross-team standardization between materials scientists, textile engineers, and biologists to ensure consistent electrode performance across fabric types.
- Involves adaptation considerations for varying textile stretch, thickness, and hydrophobicity that affect PDMS absorption and material adhesion.
- Practical limitations include long-term stability of organic electroactive materials under repeated washing, stretching, and environmental exposure as noted in the source.
