Pukyong National University Professor Publishes Cover Paper in American Chemical Society International Journal 'Langmuir'

Professor Im Dojin of the Department of Chemical Engineering Identifies the 'Liquid Droplet Contact Charging Phenomenon' Using Next-Generation Digital Technology
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Professor Im Do-jin, Pukyong National University.

[Asia Economy Yeongnam Reporting Headquarters Reporter Kim Yong-woo] The paper by Professor Lim Do-jin of the Department of Chemical Engineering at Pukyong National University has been featured as the cover paper in the recent issue 36 of the international academic journal Langmuir, drawing attention to the value of the paper.

Professor Lim's paper published as the cover article in the SCI-level journal Langmuir is titled "Effect of Deformation on Droplet Contact Charge Electrophoresis."

This paper elucidates the core fundamental phenomena of the droplet contact charging phenomenon, a small liquid droplet (droplet) contact charging phenomenon emerging as a new technology in the microfluidics field.

The "droplet contact charging" phenomenon refers to the phenomenon where a conductive droplet existing in a non-conductive medium, upon direct contact with a high-voltage electrode, is charged with the same charge as the electrode at the moment of contact and moves to the opposite electrode due to electrical repulsion.

In this paper, Professor Lim presented results accurately calculating the change in charge amount as the droplet deforms under an electric field and the resistance when moving within the fluid.

This research result is evaluated as an essential fundamental study that can greatly enhance the applicability of next-generation digital microfluidic technology.

Digital microfluidic technology based on the droplet contact charging phenomenon can utilize small liquid droplets as individual biological reactors using electricity, making it a next-generation technology with very high potential for application in life sciences and medical fields such as cell culture, observation, and drug responsiveness testing.

Professor Lim conducted the research with support from the Basic Science Research Program in Science and Engineering funded by the National Research Foundation of Korea. In April, he was also recognized for his research capabilities by publishing related research as a cover paper in the same journal.

Langmuir was established in 1985 by the American Chemical Society (ACS) to honor Nobel Chemistry Prize laureate Irving Langmuir. It boasts global authority in the fields of chemistry, materials, colloids, and surface science.