RISO PRINT GOCCO LAMP sintered silver nanowires

Abstract

According to "Light sintering of ultra-smooth and robust silver nanowire networks embedded in poly(vinyl-butyral) for flexible OLED" the sintering of the Ag-NW conductive layer can be done by intensive pulse light (IPL), using strong white light to create heat to welder Ag-NWs to form a network to increase the conductivity. An alternative light source is performed in this experiment due to the difficulty to obtain expansive IPL. The Japanese toy kit "RISO PRINT GOCCO LAMP" introduced by the founder of Bioclub Tokyo, Georg Tremmel is a Japanese riso print kit that allow user to create personalized riso print mask by the heat created from the exploded light lamp provided in the kit. This experiment simply compares the conductivity of the Ag-NW layer before and after the exposure. The Ag-NWs used in this experiment is labelled "diameter < 100nm, length > 30 um".

The original RISO PRINT GOCCO LAMP kit

Schematic of IPL sintering sytem for Ag-NWs and peeling method with PVB film introduced in "Light sintering of ultra-smooth and robust silver nanowire networks embedded in poly(vinyl-butyral) for flexible OLED".

Schematic of IPL sintering system for Ag-NWs introduced in "Rapid Pulsed Light Sintering of Silver Nanowires on Woven Polyester for personal thermal management with enhanced performance, durability and costeffectiveness".

• The original RISO PRINT GOCCO LAMP kit
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  The package of RISO PRINT GOCCO LAMP KIT.

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  The original RISO GOCCO LAMP printing station with bulbs holder and printing frame.

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  The original GOCCO LAMP holder with reflective surfaces.

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  Close-up photo of the GOCCO LAMP BULB.

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  The original RISO GOCCO PRINT LAMP videotape, package and lamps.

The setting of GOCCO LAMP Ag-NWs welding

The Ag-NWs samples are prepared by mixing few drops of 200ml of 70% ethanol with 0.18 grams of AgNWs. The solution is ultrasonicfied for 20 mins. The GOCCO bulbs are attached on a hand drill table with adjustable height setting 1 cm above the Ag-NWs samples. The white light flash can be triggered by short circuit the bulb connector with a 9V battery. The unsintered and exposured samples are compared under SEM. The result shows no sign of sintering occurred and the colorized SEM photo shows there's some glues attached on the silver nanowires. Indicating the need of acetone bath and the sintering flash time, reflective surface are needed to reach the expected welding.

• Welding setup with GOCCO LAMP
• RISO PRINT GACCO LAMP welding for Ag-NW 01.jpg

  DIY bulb holder for GOCCO LAMP. The white light flash was activated by a 9V battery with jumper wires.

• RISO PRINT GACCO LAMP welding for Ag-NW 02.jpg

  Close-up of the Ag-NWs samples on glass with the GOCCO LAMP above.

• SEM of Ag-NWs comparisons
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  SEM photo of Ag-NWs with measurement at 1µm.

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  SEM photos of the Ag-NWs after the GOCCO LAMP exposure at 500nm.

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  SEM photos of the Ag-NWs after the GOCCO LAMP exposure at 300nm.

• SEM of colorized Ag-NWs comparisons
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  SEM nano art by Joakim Reuteler.

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  Colorised SEM photos of the Ag-NWs after the GOCCO LAMP exposure at 500nm.

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  Colorised SEM photos of the Ag-NWs after the GOCCO LAMP exposure at 300nm.

References

1. The original usage of Riso print GOCCO lamp RISO PRINT GOCCO LAMP demonstration.
2. Lee, Dong Jun, Youngsu Oh, Jae-Min Hong, Young Wook Park, and Byeong-Kwon Ju. 2018. “Light Sintering of Ultra-Smooth and Robust Silver Nanowire Networks Embedded in Poly(Vinyl-Butyral) for Flexible OLED.” Scientific Reports 8 (1): 14170. https://doi.org/10.1038/s41598-018-32590-0.
3. Jin, Hwa-Young, Jae-Yup Kim, Jin Ah Lee, Kwangsoo Lee, Kicheon Yoo, Doh-Kwon Lee, BongSoo Kim, et al. 2014. “Rapid Sintering of TiO2 Photoelectrodes Using Intense Pulsed White Light for Flexible Dye-Sensitized Solar Cells.” Applied Physics Letters 104 (14): 143902. https://doi.org/10.1063/1.4871370.