PhD & Postdoc

Dae-jung Kim

Biosensor Array Engineering · Yonsei University

Dae-jung Kim engineers gold nanoparticle-decorated impedimetric biosensor arrays for five-plex cardiac biomarker detection — troponin I, BNP, CRP, D-dimer, and myoglobin — in a single 50 µL finger-prick whole-blood sample at Yonsei University's BioNano Systems Laboratory. Under Prof. Sung-min Park, he has developed thiol-PEG capture probe chemistry that simultaneously functions on a shared gold working electrode array while maintaining selectivity across the five analytes in complex serum matrices. Electrochemical impedance spectroscopy at each electrode in the array generates frequency-domain fingerprints that a support vector machine classifier deconvolves into quantitative biomarker concentrations, achieving clinical-decision-point accuracy (AUC > 0.97) against the standard immunoassay reference panel on 140 patient samples from Samsung Medical Center. The full five-plex assay completes in under 12 minutes. Dae-jung has co-founded CardioSens Inc., a Yonsei University spin-out, and is in active IP licensing discussions with Samsung Medical Center's diagnostics procurement office. His Biosensors 2026 conference acceptance in Busan and active fundraising for a Series A in Korea's medtech ecosystem mark his definitive transition into entrepreneurship.

Thesis Topic

Multiplexed Electrochemical Biosensor Array for Simultaneous Quantification of Five Cardiac Biomarkers at the Point of Care

Transition Signals