Research Areas

Particulate matter removal and monitoring

Particulate matter (PM) removal using microdroplets

Efficient PM removal using water droplets with mechanical effect

PM capturing mechanisms
Schematics of PM scavenging to relative size of particles and droplets
Collection efficiency of a single microdroplet (D=5μm)
Particle Image Velocimetry
Temporal variation in PM concentration
Schematics of PM scavenging to relative size of particles and droplets
Comparison of PM removal parameters and with previous studies

Advanced flow visualization

Digital stereo-holographic microscopy

Biomimetic technologies developed for PM removal

PM removal technique inspired by air-purifying plant leaves
Effect of ventilation flow and humidity on PM removal
Effect of trichome structure of Tillandsia on PM removal

Nature-inspired removal of PM particles: Digital holographic microscopy (DHM) for monitoring PM dynamics

Hologram reconstruction and PM detection
3D positions, shape, and diameters of PMs can be measured using a DHM technique.
3D dynamic behaviors of PMs on leaves
Settling velocity of PMs on P. frutescens leaves is 12.11 ± 1.88% faster than that on C. annuum leaves

Accelerated velocity of PMs near trichomes

Settling velocities of PMs are accelerated near the trichomes of plant leaves.

Electric charge of PM particles

Electric charge of PM particles is measured using a DHM technique.

PM removal using microdroplets with electrical effect

Electrospraying for PM removal
Electric charge measurement on smoke and droplets
Variation in PM mass concentration according to applied voltage
PM collection efficiency with diameters of particles and droplets

PM removal using photothermal evaporator

Schematic for PM removal based on photothermal evaporator
Photothermal evaporator
Membrane mixed with CNT/CB/PDMS
Visualization of photothermal-driven flow
PM removal effect