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RMIT Unveils ‘Electronic Dolphin’ Minibot to Skim Oil Spills With Sea-Urchin Coating

Lab trials report about 2 milliliters per minute of oil at over 95% purity using a reusable, water-repellent filter.

Overview

  • The sneaker-sized, remote-controlled prototype runs for roughly 15 minutes per charge and stores recovered oil in an onboard chamber.
  • A specialized coating grows microscopic, sea urchin‑like spikes that trap air so water rolls off while oil adheres, avoiding filter waterlogging.
  • Controlled tests showed selective separation with high purity, confirming the concept for surface oil collection without harsh chemicals.
  • The research is published in the journal Small, with key materials development credited to PhD researcher Surya Kanta Ghadei.
  • RMIT engineers plan field testing, long-term durability studies, and scale-up to larger autonomous units, and they are seeking industry partners for deployment.