Affordable Fabrication of Conductive Electrodes and Dielectric Films for a Paper-based Digital Microfluidic Chip

Veasna Soum, Yunpyo Kim, Sooyong Park, Mary Chuong, Soo Ryeon Ryu, Sang Ho Lee, Georgi Plamenov Tanev, Jan Madsen, Oh-Sun Kwon*, Kwanwoo Shin

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

In order to fabricate a digital microfluidic (DMF) chip, which requires a patterned array of electrodes coated with a dielectric film, we explored two simple methods: Ballpoint pen printing to generate the electrodes, and wrapping of a dielectric plastic film to coat the electrodes. For precise and programmable printing of the patterned electrodes, we used a digital plotter with a ballpoint pen filled with a silver nanoparticle (AgNP) ink. Instead of using conventional material deposition methods, such as chemical vapor deposition, printing, and spin coating, for fabricating the thin dielectric layer, we used a simple method in which we prepared a thin dielectric layer using pre-made linear, low-density polyethylene (LLDPE) plastic (17-μm thick) by simple wrapping. We then sealed it tightly with thin silicone oil layers so that it could be used as a DMF chip. Such a treated dielectric layer showed good electrowetting performance for a sessile drop without contact angle hysteresis under an applied voltage of less than 170 V. By using this straightforward fabrication method, we quickly and affordably fabricated a paper-based DMF chip and demonstrated the digital electrofluidic actuation and manipulation of drops.
Original languageEnglish
Article number109
JournalMicromachines
Volume10
Issue number2
Number of pages10
ISSN2072-666X
DOIs
Publication statusPublished - 2019

Keywords

  • Ballpoint pen printing
  • Conductive electrode
  • Dielectric film
  • Digital microfluidic chip
  • Electrowetting
  • Plastic wrap

Cite this

Soum, Veasna ; Kim, Yunpyo ; Park, Sooyong ; Chuong, Mary ; Ryu, Soo Ryeon ; Lee, Sang Ho ; Tanev, Georgi Plamenov ; Madsen, Jan ; Kwon, Oh-Sun ; Shin, Kwanwoo. / Affordable Fabrication of Conductive Electrodes and Dielectric Films for a Paper-based Digital Microfluidic Chip. In: Micromachines. 2019 ; Vol. 10, No. 2.
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title = "Affordable Fabrication of Conductive Electrodes and Dielectric Films for a Paper-based Digital Microfluidic Chip",
abstract = "In order to fabricate a digital microfluidic (DMF) chip, which requires a patterned array of electrodes coated with a dielectric film, we explored two simple methods: Ballpoint pen printing to generate the electrodes, and wrapping of a dielectric plastic film to coat the electrodes. For precise and programmable printing of the patterned electrodes, we used a digital plotter with a ballpoint pen filled with a silver nanoparticle (AgNP) ink. Instead of using conventional material deposition methods, such as chemical vapor deposition, printing, and spin coating, for fabricating the thin dielectric layer, we used a simple method in which we prepared a thin dielectric layer using pre-made linear, low-density polyethylene (LLDPE) plastic (17-μm thick) by simple wrapping. We then sealed it tightly with thin silicone oil layers so that it could be used as a DMF chip. Such a treated dielectric layer showed good electrowetting performance for a sessile drop without contact angle hysteresis under an applied voltage of less than 170 V. By using this straightforward fabrication method, we quickly and affordably fabricated a paper-based DMF chip and demonstrated the digital electrofluidic actuation and manipulation of drops.",
keywords = "Ballpoint pen printing, Conductive electrode, Dielectric film, Digital microfluidic chip, Electrowetting, Plastic wrap",
author = "Veasna Soum and Yunpyo Kim and Sooyong Park and Mary Chuong and Ryu, {Soo Ryeon} and Lee, {Sang Ho} and Tanev, {Georgi Plamenov} and Jan Madsen and Oh-Sun Kwon and Kwanwoo Shin",
year = "2019",
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language = "English",
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}

Affordable Fabrication of Conductive Electrodes and Dielectric Films for a Paper-based Digital Microfluidic Chip. / Soum, Veasna; Kim, Yunpyo; Park, Sooyong; Chuong, Mary; Ryu, Soo Ryeon; Lee, Sang Ho; Tanev, Georgi Plamenov; Madsen, Jan; Kwon, Oh-Sun; Shin, Kwanwoo.

In: Micromachines, Vol. 10, No. 2, 109, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

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T1 - Affordable Fabrication of Conductive Electrodes and Dielectric Films for a Paper-based Digital Microfluidic Chip

AU - Soum, Veasna

AU - Kim, Yunpyo

AU - Park, Sooyong

AU - Chuong, Mary

AU - Ryu, Soo Ryeon

AU - Lee, Sang Ho

AU - Tanev, Georgi Plamenov

AU - Madsen, Jan

AU - Kwon, Oh-Sun

AU - Shin, Kwanwoo

PY - 2019

Y1 - 2019

N2 - In order to fabricate a digital microfluidic (DMF) chip, which requires a patterned array of electrodes coated with a dielectric film, we explored two simple methods: Ballpoint pen printing to generate the electrodes, and wrapping of a dielectric plastic film to coat the electrodes. For precise and programmable printing of the patterned electrodes, we used a digital plotter with a ballpoint pen filled with a silver nanoparticle (AgNP) ink. Instead of using conventional material deposition methods, such as chemical vapor deposition, printing, and spin coating, for fabricating the thin dielectric layer, we used a simple method in which we prepared a thin dielectric layer using pre-made linear, low-density polyethylene (LLDPE) plastic (17-μm thick) by simple wrapping. We then sealed it tightly with thin silicone oil layers so that it could be used as a DMF chip. Such a treated dielectric layer showed good electrowetting performance for a sessile drop without contact angle hysteresis under an applied voltage of less than 170 V. By using this straightforward fabrication method, we quickly and affordably fabricated a paper-based DMF chip and demonstrated the digital electrofluidic actuation and manipulation of drops.

AB - In order to fabricate a digital microfluidic (DMF) chip, which requires a patterned array of electrodes coated with a dielectric film, we explored two simple methods: Ballpoint pen printing to generate the electrodes, and wrapping of a dielectric plastic film to coat the electrodes. For precise and programmable printing of the patterned electrodes, we used a digital plotter with a ballpoint pen filled with a silver nanoparticle (AgNP) ink. Instead of using conventional material deposition methods, such as chemical vapor deposition, printing, and spin coating, for fabricating the thin dielectric layer, we used a simple method in which we prepared a thin dielectric layer using pre-made linear, low-density polyethylene (LLDPE) plastic (17-μm thick) by simple wrapping. We then sealed it tightly with thin silicone oil layers so that it could be used as a DMF chip. Such a treated dielectric layer showed good electrowetting performance for a sessile drop without contact angle hysteresis under an applied voltage of less than 170 V. By using this straightforward fabrication method, we quickly and affordably fabricated a paper-based DMF chip and demonstrated the digital electrofluidic actuation and manipulation of drops.

KW - Ballpoint pen printing

KW - Conductive electrode

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KW - Digital microfluidic chip

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KW - Plastic wrap

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