The Chemistry of Interaction: Biosensors, Body Fluids, and Cosmetics

What if a tattoo could change colour to reveal information about your health? Katia Vega presents research from the Interactive Organisms Lab at UC Davis on turning chemical signals in body fluids - such as pH, sodium and glucose levels - into new forms of interaction. The projects integrate biosensors into familiar objects and practices, from tattoos and dental orthodontics to lipstick, nail polish and wearable jewellery, making otherwise invisible biological information accessible. The talk also covers extensions to animal health monitoring and responsive biomaterials, opening opportunities for interaction design beyond conventional electronic interfaces. Her work spans Beauty Technology (electronics embedded in cosmetics), Biocosmetic Interfaces (everyday cosmetics and permanent tattoos as chemical biosensors) and Growable Interfaces (bio-based and living materials as substrates for sustainable interactive systems).