Virginia Tech Develops Self‑Cleaning Nanobiosensor for Chronic Wound Monitoring

Researchers at Virginia Tech have created a self‑regenerating biosensor that cleans itself after being coated with biological material such as blood. The device features nano‑scale depressions less than 10 nm wide and is about 5,000 times thinner than a human hair. When irradiated with ultrashort‑pulse lasers it produces microscopic cavitation bubbles that generate localized heat, gently detaching accumulated proteins and restoring sensor sensitivity.

In laboratory tests the sensor remained functional after 24 hours of exposure to human blood serum, successfully detecting pyocyanin and continuously monitoring molecular changes in wound‑model samples over a full day. The researchers say the technology could enable intelligent wound dressings and real‑time clinical diagnostic tools, and may also be applicable to environmental water monitoring. "Our self‑regenerating sensor paves the way for intelligent wound dressings and clinical diagnostic tools," said Wei Zhou of Virginia Tech. Peter Vikesland added, "Our approach has great potential wherever long‑term monitoring is required."