• Research

    Yonsei Microsystems Laboratory

Current Research Area

Thermoelectric biosensor

Thermopile

  • One of thermal sensors based on Seeback effect
    → Seeback effect: The temperature gradients
  • The electrical potential gradients

Main idea

  • Enhancing sensitivity by a isolation → Enhancing sensitivity
  • Simplifying the measurement process → Removing calibration ste

MEA

Objective

  • Long-term: electrical neural prosthesis to rehabilitate a damaged nerve
  • Short-term: build electrical nerve-signal-database up by measuring nervous signal

Result

  • Enhancing sensitivity by a isolation → Enhancing sensitivity
  • Simplifying the measurement process → Removing calibration ste

Tactile sensor

Thermoelectric tactile sensor

  • Contact force
    → Substrate experience stress
    → Thermopile in substrate is bent (Δ R)
  • Contact heat
    → Contact heat is applied
    Thermopile generates electric voltages (Δ V)

Fabrication & Result

ECG sensor

Thermoelectric tactile sensor

  • The potential difference on the body → Detecting the potential difference by electrode
  • Excellent flexibility → Good attachment property to the human body
  • One point detection → Simple measurement and structure

Fabrication & Result

Realization of total analysis system on chip

Microfluidic Calorimeter

  • Deliver bio-samples to the hot junction through microfluidic channel
  • Accurate sample handing
  • Reusable and real-time monitoring system

Thermoelectric biosensor with micromixer & Preconcentrator

  • Enhanced diffusion mixing efficiency → High efficiency mixing in low Re (laminar flow)
  • Force is exerted on a dielectric particle when it is subjected to a non-uniform electric field
    → Reducing reagent consumption & High-efficiency sensing

Hybrid blood cell sorter

Principle

  • Combination of momentum-based hydrodynamics and magnetophoresis

Features

  • Label-free and high throughput (above 1ml/min) cell separation
  • Adjustable sorting efficiency by varying magnetic field

Sized-based particle separator

Principle

  • A combination of inertial hydrodynamics and dielectrophoretice

Fabrication and Result

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