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Japanese researchers are developing a groundbreaking sensor that could revolutionize the rapid detection of various pathogens, including influenza viruses, hepatitis B, mad cow disease agents, and pesticide residues. This innovative technology aims to offer faster, more efficient, and more accurate diagnostic tools for medical and agricultural applications.
According to recent reports, scientists at the Institute of Scientific Research at Hokkaido University have developed a carbon nanotube-based sensor. The device measures between 1 to 5 micrometers in length and just 5 nanometers in diameter. When antigens and antibodies are introduced onto the silicon substrate, the sensor can quickly identify the type of virus under electrical stimulation.
For instance, when it comes to identifying influenza viruses—of which there are approximately 135 known strains—the sensor works by detecting unique current changes when different viral antigens bind with specific antibodies on the surface. These distinct electrical responses allow for precise virus classification. Researchers claim that this sensor is hundreds of thousands of times more sensitive than conventional testing methods.
Professor Yukio Takeshi, who leads the project, highlighted that traditional methods for identifying influenza viruses typically take over three hours and require transporting samples to well-equipped laboratories. In contrast, the new sensor can provide results in less than a minute using as few as 10 carbon nanotube sensors.
The team is now working to refine the technology further, aiming to create portable detection devices suitable for field use. Such advancements could significantly improve early diagnosis, outbreak control, and on-site monitoring in remote or resource-limited areas. With continued development, this sensor has the potential to become a vital tool in public health and food safety.