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Your search keyword '"Lee, Hankeun"' showing total 22 results
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22 results on '"Lee, Hankeun"'

8. Smartphone clip-on instrument and microfluidic processor for rapid sample-to-answer detection of Zika virus in whole blood using spatial RT-LAMP

Author

Jankelow, Aaron M., primary, Lee, Hankeun, additional, Wang, Weijing, additional, Hoang, Trung-Hieu, additional, Bacon, Amanda, additional, Sun, Fu, additional, Chae, Seol, additional, Kindratenko, Victoria, additional, Koprowski, Katherine, additional, Stavins, Robert A., additional, Ceriani, Dylann D., additional, Engelder, Zachary W., additional, King, William P., additional, Do, Minh N., additional, Bashir, Rashid, additional, Valera, Enrique, additional, and Cunningham, Brian T., additional

Published
2022
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11. Smartphone clip-on instrument and microfluidic processor for rapid sample-to-answer detection of Zika virus in whole blood using spatial RT-LAMP

Author

Coté, Gerard L., Wang, Weijing, Lee, Hankeun, Jankelow, Aaron M., Hoang, Trung-Hieu, Bacon, Amanda, Sun, Fu, Chae, Seol, Kindratenko, Victoria, Koprowski, Katherine, Stavins, Robert A., Ceriani, Dylann, Engelder, Zachary, King, William P., Do, Minh N., Bashir, Rashid, Valera, Enrique, and Cunningham, Brian T.

Published
2023
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21. A Microsized Microbial Solar Cell: A demonstration of photosynthetic bacterial electrogenic capabilities.

Author

Yoon, San, Lee, Hankeun, Fraiwan, Arwa, Dai, Chunhui, and Choi, Seokheun

Abstract

This article focuses on a microsized microbial solar cell (MSC) that can produce sustainable energy through photosynthetic reactions of cyanobacteria Synechocystis PCC 6803 in the anode. The MSC has 57-μL anode/cathode chambers defined by laser-machined poly(methyl methacrylate) (PMMA) substrates. We obtained a maximum power density of 7.09 nW/cm2, which is 170 times more power than previously reported microelectromechanical system (MEMS) MSCs. The importance of the light intensity was demonstrated by the higher values of generated current during the day than at night, indicating light-dependent photosynthetic processes. Considering that sunlight offers an unlimited source of energy, the development of self-sustainable MSCs that rely on light as an energy source will become an increasingly important area of research in the future. In accordance with the MSC, we developed a photosynthetic cathode-based microbial fuel cell (MFC), showing that the use of cyanobacteria can be useful as well as efficient and sustainable catalysts for the cathode since they act as oxygenators.

Published
2014
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22. A Photonic Resonator Interferometric Scattering Microscope for Label-free Detection of Nanometer-Scale Objects with Digital Precision in Point-of-Use Environments.

Author

Liu L, Tibbs J, Li N, Bacon A, Shepherd S, Lee H, Chauhan N, Demirci U, Wang X, and Cunningham BT

Abstract

Label-free detection and digital counting of nanometer-scaled objects such as nanoparticles, viruses, extracellular vesicles, and protein molecules enable a wide range of applications in cancer diagnostics, pathogen detection, and life science research. The contrast of interferometric scattering microscopy is amplified through a photonic crystal surface, upon which scattered light from an object combines with illumination from a monochromatic plane wave source. The use of a photonic crystal substrate for interference scattering microscopy results in reduced requirements for high-intensity lasers or oil-immersion objectives, thus opening a pathway toward instruments that are more suitable for environments outside the optics laboratory. Here, we report the design, implementation, and characterization of a compact Photonic Resonator Interferometric Scattering Microscope (PRISM) designed for point-of-use environments and applications. The instrument incorporates two innovative elements that facilitate operation on a desktop in ordinary laboratory environments by users that do not have optics expertise. First, because scattering microscopes are extremely sensitive to vibration, we incorporated an inexpensive but effective solution of suspending the instrument's main components from a rigid metal framework using elastic bands, resulting in an average of 28.7 dBV reduction in vibration amplitude compared to an office desk. Second, an automated focusing module based on the principle of total internal reflection maintains the stability of image contrast over time and spatial position, facilitating automated data collection. In this work, we characterize the system's performance by measuring the contrast from gold nanoparticles with diameters in the 10-40 nm range and by observing various biological analytes, including HIV virus, SARS-CoV-2 virus, exosomes, and ferritin protein.

Published
2022
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