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21 results on '"Soum, Veasna"'

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

Author

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

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.

Published
2019

13. Formulation of Conductive Filament Composited of Thermoplastic with Carbon Black for a Simple 3D Printing Electrical Device

Author

Chae Heedo, JO Aeree, Paek Seunghwi, Shin Kwanwoo, Jang Wonhyeong, Ryu Soo Ryeon, Kim Yongjun, Kim Heeju, Kwon Oh‐Sun, and Soum Veasna

Subjects
010302 applied physics, chemistry.chemical_classification, Materials science, Thermoplastic, business.industry, Biomedical Engineering, 3D printing, Bioengineering, 02 engineering and technology, General Chemistry, Carbon black, Electrical devices, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, chemistry, Simple (abstract algebra), 0103 physical sciences, Conductive filament, General Materials Science, Composite material, 0210 nano-technology, business
Published
2016

19. Digital Microfluidics: Paper-Based Digital Microfluidic Chip for Multiple Electrochemical Assay Operated by a Wireless Portable Control System (Adv. Mater. Technol. 3/2017)

Author

Ruecha, Nipapan, primary, Lee, Jumi, additional, Chae, Heedo, additional, Cheong, Haena, additional, Soum, Veasna, additional, Preechakasedkit, Pattarachaya, additional, Chailapakul, Orawon, additional, Tanev, Georgi, additional, Madsen, Jan, additional, Rodthongkum, Nadnudda, additional, Kwon, Oh-Sun, additional, and Shin, Kwanwoo, additional

Published
2017
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20. Paper‐Based Digital Microfluidic Chip for Multiple Electrochemical Assay Operated by a Wireless Portable Control System

Author

Ruecha, Nipapan, primary, Lee, Jumi, additional, Chae, Heedo, additional, Cheong, Haena, additional, Soum, Veasna, additional, Preechakasedkit, Pattarachaya, additional, Chailapakul, Orawon, additional, Tanev, Georgi, additional, Madsen, Jan, additional, Rodthongkum, Nadnudda, additional, Kwon, Oh‐Sun, additional, and Shin, Kwanwoo, additional

Published
2017
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