Home▸Nanotechnology & MEMS▸Digital Microfluidics: Electrowetting Droplet Actuator

Digital Microfluidics: Electrowetting Droplet Actuator

Interactive 3D electrowetting-on-dielectric chip: activate electrode pads under a liquid droplet to lower its local contact angle, dragging it step by step across a lab-on-a-chip grid, splitting it in two, or merging two droplets into one — with no channels, pumps or moving parts.

Nanotechnology & MEMS3DAdvanced60 FPS💧 Water

Details

CategoryNanotechnology & MEMS

RenderingThree.js · WebGL

DifficultyAdvanced

Target FPS60

ControlsElectrode saturation voltage slider (5-40 V) sets how far the contact angle drops when an electrode is activated (Young-Lippmann equation, saturating near 62 degrees); coating hydrophobicity slider (130-168 deg) sets the droplet's rest contact angle; Move / Split / Merge mode buttons; click a droplet to select it, then click a neighboring electrode to act; + Droplet adds a droplet, Reset chip restores the starting layout.

Three.jselectrowettingdigital microfluidicslab-on-a-chipcontact angledroplet actuationnanofluidics

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A liquid droplet rests on a hydrophobic electrode grid with no channels, pumps or moving parts. Select it, then click an adjacent electrode: the applied voltage locally lowers the contact angle there via electrowetting, pulling the droplet's contact line and dragging it one grid cell at a time. Switch to Split mode to stretch and pinch a droplet into two, or Merge mode to coalesce two droplets into one — all through electrical control of surface wetting, the working principle behind programmable lab-on-a-chip devices.

⚙ Under the hood

A liquid droplet beads up on a hydrophobic electrode grid with no channels or pumps. Activate a neighboring electrode to lower its contact angle via electrowetting and drag the droplet one step across the chip, stretch and pinch it into two droplets in Split mode, or coalesce two droplets into one in Merge mode.

Three.jselectrowettingdigital microfluidicslab-on-a-chipcontact angledroplet actuationnanofluidics

3D · Three.js / WebGL renderer · 60 FPS target · runs fully client-side, no install