printable elastic conductors with a high conductivity for electronic textile applications

Advanced flexibility-
Regional electronics such as flexible displays and sensors will thrive on the engineering function ink formula for printed electronics, in which spontaneous arrangement of molecules contributes to the printing process.
In here, we report the of printable of elastic conductor when tensile to 215% strain when its initial conductivity up to 738 S-1 conductivity up to 182 S-1.
The elastic conductor ink is composed of Ag flakes, fluorine rubber and fluorine surface active substances.
Fluorine surface active substance is the key component to guide surface formation
Printing local conductive networks in elastic conductors, resulting in high conductivity and scalability.
We demonstrate the feasibility of our ink by making a stretchable organic transistor active matrix on rubber tensile properties
When stretched to 110%, the gradient substrate with undamaged function and the wearable EMG sensor printed on the textile garment.
From Sigma Aldrich (
Product No. : 327077 Aldrich, silver, 10 μm, 99.
9% base of trace metals).
Measurement of size distribution by laser diffraction particle size analyzer (SALD-
Shimizu 2300, Japan).
Fluorine rubber (DAI-EL G801, DAI-EL G912 and DAI-EL LT302)
Received from Japan Dajin Industrial Co. , Ltd.
Ag sheet and surface active substance/aqueous solution of fluorine (Zonyl FS-300)
Purchased from Sigma Aldrich, USA.
They and 4-methyl-2-
At the above scale, pentone is heated by a magnetic mixer as a solvent for 12 u2009 h.
After printing, heat for 30 minutes at 80 °c to remove the excess solvent.
Display design of elastic conductors printed on silicone rubber using 125μm-
Thick pi shadow mask.
As explained later, the rigid pi platform is embedded in silicone rubber with a tensile gradient.
Measuring the thickness and width of printed elastic conductors with a laser microscope (VK-
9710, keenshi company, Japan).
Average is 30-
500 μm thicknessμm wide.
The length is determined by the prepared substrate, which is 3 cm.
Next, the printed elastic conductor is high
Precision mechanical system (AG-
X Shimizu company)
At a stretch speed of 10% minutes, use four-probes-
A way to use more numberssource meter (
Jishili instrument company 2400, USA)as shown in .
Five samples were evaluated for each condition of the elastic conductor ink.
Under the assumption that the total volume remains constant, the conductivity under strain is calculated based on the measured geometry and resistance.
It is reasonable to take into account that the Poisson\'s ratio at 150% strain is 0. 51±0.
05, measured with a laser microscope by the same position as shown in the observation.
In addition, in order to compare our results with previous reports, it is assumed that the conductivity is uniform along the printed elastic conductor.
Two-way strain test is performed by inflatable silicone rubber balloons coated with elastic conductors ().
The distortion behavior is evaluated by using the clip to maintain a constant lateral strain (0%)
When twisting the device from one end ().
To carry out the cycle life measurement, the surface of the silicone rubber substrate is exposed to UV-ozone (UV-1, SAMCO Inc. , Japan)
1 minute before printing to improve adhesion.
Stretch and release speed is kept at 5% seconds.
Scanning electron microscope images from sheet Hitachi high
Technology of 5 kv acceleration voltage. Aluminium (100-nm thick)
Evaporated on the 12th. 5-μm-
Thick pi film as the gate electrode.
In all vacuum evaporation, metal shadow masks are used to map.
For the manufacture of Gate Media, 19-nm-
Thick alumina is formed by Anode Oxidation.
Subsequently, the surface is activated with an oxygen plasma and then immersed in 5 mM 18 ester 2-
The N-alcohol solution of 16 u2009 h is formed from
Assemble single layer.
DNTT then evaporated as a semiconductor.
When Au deposition, the channel length of the programmable single transistor is 50 μm, the channel width is 50 μm, and the channel width of the Extensible active matrix is 2,750 μm to form a source and drain
Finally, Poly p-px (diX-
Senior staff of Junior plus competition Co. , Ltd. , Japan)
Chemical vapor deposition is used to form as a package layer with a thickness of 1. 5u2009μm.
The process of embedding organic thin film transistors (OTFTs)
With a stretch gradient.
First, modify the back of the transistor with an oxygen plasma, and then rotate the coating with a highly diluted silicone rubber liquid (
Sylgard, Dow Corning Dongli 184, Japan;
Base: sulfur agent: hexane = 10: 20)at 6,000u2009r. p. m. for 1u2009min.
The device then annealing for 5 min at 80 °c, drying hexane and partially cross-linking the silicone. This 1-μm-
Thick silicone layer used as adhesive layer.
Next, laminate equipment on fluorine polymer
Coated glass using a thin silicone layer, in passing-
Device holes for improving adhesion.
After heating again at 80 °c for 5 minutes, cut the round frame around an organic transistor with a diameter of 2.
Use 6mm of the green laser (T-
Laser Marking MD-Keenshi T 1000).
These frames act as rigid islands.
Next, silicone rubber liquid (
Sylgard 184 base: nourishing agent = 7:1)
Rotate the coating under 500 u2009 r. p. m.
1 minute, then the layering of the film, leaving only the circle-shape-
Cutting transistors working as rigid islands throughout the device.
We can then make patterns of transistors and silicone rubber with a higher curing agent content.
After heating for 5 min at 80 °c, the silicone rubber liquid (
Sylgard 184 base: nourishing agent = 20:1)
Rotate the coating on the whole equipment at 500r. p. m. , 1u2009min.
Finally, the device is annealing for 2 h at 80 °c.
The printing process of elastic conductor wires is shown.
First, organic foodtransistor-
Peel embedded silicon rubber sheet from fluorine polymer
Coated glass, upside down onto the pen film.
Then, a silicone rubber liquid (
Sylgard 184 base: nourishing agent = 20:1)
Rotate the coating under 4,000 u2009 r. p. m.
1 minute, then heated for 2 hours at 80 °c
This layer prevents short circuit of printed elastic conductor by conducting laser
Cutting edge of Pi film. Then, laser-via-
Holes are made for electrode pads for gate, transistor source and drain.
Next, the elastic conductor is depicted as a stretched word line and connected to the gate electrode through the hole.
The thickness and width are 30 μm and 500 μm, respectively. Then, 100-μm-thick and 1-mm-
Wide insulated silicone rubber liquid (
Sylgard 184 base: nourishing agent = 20:1)
Draw the pattern with a template printing method and then heat it for 2 hours at 80 °c
Next, draw the pattern of the bit line and ground wire with elastic conductor and connect to the source pole and drain pole.
Then, we get the active matrix of the programmable organic transistor.
During the manufacturing process, organic sheet transistors are exposed to temperatures up to 80 ° c, far below the thermal stability of up to 110 ° c (ref. ). First, laser-via-
Drill holes on commercially available stretch-able sports textiles (CW-X, Wacoal Corp. , Japan).
The elastic conductor ink is then printed with a pi template on both sides of the textile, and after each printing step, the device is heated for 30 minutes at 80 °c.
The elastic conductor on one side is wirings, and the elastic conductor on the other side is an important electrode recorded

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