Researcher earns patent for breath-based virus detection technology

August 14, 2026 - 03:59

A long-running project to turn breath into a diagnostic tool has reached a major milestone. Distinguished Professor Nian Sun, who has spent years refining a sensor that reads chemical markers in exhaled air, just received a patent for his virus detection technology. The device, which looks like a small handheld unit, works by analyzing volatile organic compounds in a person's breath and matching them against known viral signatures.

Sun's approach is not entirely new in theory, but his implementation is far more sensitive than earlier attempts. Instead of relying on bulky lab equipment, the sensor uses a magnetic nanoparticle array that reacts to specific molecules. When a virus is present, even in tiny amounts, the particles shift in a way that produces a measurable electrical signal. The whole process takes under a minute.

What makes this patent stand out is its potential for everyday use. Sun envisions the device being deployed at airports, clinics, and even homes, giving people a quick screening option without needles or nasal swabs. He notes that breath-based testing is non-invasive, which could encourage more frequent testing, especially for children or those with needle anxiety.

The patent covers the core sensing mechanism, but Sun says the team is already working on a portable prototype. Clinical trials are planned to test accuracy against standard PCR tests, though he cautions that the technology is not meant to replace lab diagnostics outright. Instead, it could serve as a first-line filter, flagging people who need follow-up testing. If those trials go well, Sun expects the device could reach the market within a few years, pending regulatory approval. For now, he is focused on refining the sensor's selectivity so it can distinguish between different strains of respiratory viruses, not just one type.