Flexible Threads Turn Clothing into Radiation Detectors express

Original: "Single-Photon Sensitive Optoelectronic Fibres for Distributed Nuclear Radiation Detection in Textile Fabrics"

· Nikhil Gupta, Hang Qi, Julian Kahlbow, Igor Korover, Areg Danagoulian, Or Hen, Yoel Fink

arXiv:2604.05061 · 2026-04-06 · CC BY 4.0 · 1 min

Instrumentation and Detectors Nuclear Experiment

A seemingly ordinary thread senses radioactive radiation and turns any clothing into a living dosimeter.

Inside an ultra-thin polymer thread are microscopic crystals — scintillators. When an invisible radioactive particle hits, they flash for a moment, like fireflies. A sensitive sensor catches each flash, turning the thread into a flexible detector.

The thread stretches up to 50% and can be easily woven into clothing on a regular loom, creating a moving radiation map — the brighter the "fireflies," the higher the danger.

Tests with strontium-90, cesium-137, and cobalt-60 showed that the fabric even senses natural background radiation. To boost the signal, tungsten and merino wool were added to the braid: this unexpected pairing of metal with soft wool increased sensitivity by 20%. Tungsten converts gamma rays into a shower of electrons, which the crystals catch more readily. This also helps distinguish types of radiation, paving the way for portable studies of fundamental particles and smart clothing that warns of danger at nuclear power plants and in radiation therapy.

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The first radiation detectors used by Marie Curie and Ernest Rutherford required entire laboratories. Now you can wear a detector like a sweater.

Isaac Asimov's Foundation series mentions personal dosimeters, but fabric detectors are now a reality.

Scientists

Paul Dirac Ludwig Boltzmann William Borucki Marie Curie Enrico Fermi Chien-Shiung Wu

Concepts

silicon detector single photon detection neutrino detection scintillator radiation detector photomultiplier tube silicon photomultiplier optical fiber scintillator optical filter atomic radio receiver retina photodetector femtometer radioactive tracer particle detection technology

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Flexible Threads Turn Clothing into Radiation Detectors express