Research

Small Reactive Responsive Systems (SRRS): Miniaturized devices or systems are capable of

- generating a reactant/reagent/reactive species or performing reactions.

- responding to external physical, chemical or biological stimulus or the presence of target.

Together with my collaborators, research associates and apprentices, we are constantly looking out for new means of achieving low cost miniaturization as well as functionality in cross-disciplinary applications via new materials, assays, protocols, fabrication techniques, devices and system level integration.

 

Our current research interests include the use of micro corona devices as transducers, ion actuators, wearable/handheld/disposable biomedical devices, bioprecipitators, reactors as well as development of portable environmental sensing systems.

Note: CGM research was performed at ArKal Medical Inc, Fremont, CA, USA (2005-2012). 

 

Micro Corona Devices + Systems

MIRI Prototype XE-01
Microorganism-Ionizing Respirator. It uses corona ionizer to remove airborne bacteria instead of mechanical filtration.
Bioprecipitator with Liquid Anode
Airborne bacteria is captured with high efficiency by a micro corona based bio-precipitator. The bacteria is precipitated directly into the liquid anode which can be analyzed with NanoGene assay.
Bacterial Lysis Chip (BLC)
Low cost and low power bacterial lysis chip enabled by built-in micro corona based ozone generator.
Airborne Particle Steering
Airborne particles are charged by micro corona ionizer and steered via electric field. It can be used for active airborne particles removal.
Micro Corona Active Sterilization
Micro corona ionizer is integrated with bandage for enhanced wound healing and sterilization.
Corona Charger and Electrodes
An integrated micro corona charge and steering electrodes. It can be used for filtration as well as airborne particles detection.
Corona Ionizer for Bacterial Lysis
A micro corona ionizer is packaged in a low cost format for bacterial lysis.
Micro Corona Anenometry
Micro corona discharge is employed for anenometry.It was able to measure very low flow velocities via drift mobility increment mode.
Micro Corona Pressure Sensor
Micro corona discharge was used to sense changes in absolute pressure. It is highly robust and able to withstand pressure hammer.
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Wearable and Miniaturized Diagnostics and Therapeutics

Gummy bear based gnathodynamometer
Gummy bear is used as a bite force sensor.
Dose Monitoring
Conductive PLA filament for dose monitoring in syringe-less wearable pump.
Dose Monitoring
Conductive PLA filament for dose monitoring in syringe-less wearable pump.
Clark Error Grid
The ArKal Medical CGM was able to track blood glucose accurately as shown in the Clark Error Grid.
Silicon Microneedles
Hollow silicon microneedles for accessing interstitial fluids in the skin's epidermal layer.
Silicon Microneedle
The sharp cutting edge of the silicon microneedle.
Si Microneedle based CGM
Schematic of the microneedles based CGM developed by ArKal Medical Inc, Fremont, CA.
Screen Printed CGM
The CGM clinical prototype developed by ArKal Medical Inc, Fremont, CA.
Applying CGM
Custom applicator developed by ArKal Medical Inc for applying microneedles based CGM to subject's skin.
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Portable Environmental Sensing Systems and Apparatus

Portable analyzer for DEHP detection
Gene level optical rapid in-situ analyzer (GLORIA) based on aptamer, magnetic bead and quantum dots for detection of DEHP.
Electrocoagulator
Portable electrocoagulator for pre-concentration of cyanobacteria.
Electrocoagulator
Portable electrocoagulator for pre-concentration of cyanobacteria.
Palm-size NanoAptamer Analyzer
Bisphenol A detection using palm-size NanoAptamer analyzer
Micro Airborne Particulate Analyzer
Micro Airborne Particulate Analyzer was developed to detect airborne particulates that are smaller than 100 nm.
1st Gen IPDS
1st Gen Integrated Pathogen Detection System was developed to detect pathogenic DNA via NanoGene assay.
Bacterial Lysis Chip (BLC) Apparatus
Disposable bacterial lysis chip with built-in ozone generator. This is a demonstration of low-power and low cost bacterial lysis chip that can be used with IPDS.
Portable Cell Lysis Apparatus
Piezoelectric atomization lysis of bacterial cells was enabled via commercially available components. It is low-cost, low-power and high lysis efficiency.
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    Beelee Chua  2013 - 2019

    School of Electrical Engineering, Korea University

    145 Anam-ro, Seongbuk-Gu, Seoul 02841, Korea

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Gummy bear based gnathodynamometer

Gummy bear is used as a bite force sensor.