A groundbreaking detector for toxic gases that can be used continuously over time has been developed by MIT researchers, posing a potential game-changer for both industrial and residential safety. The novel technology which is cost-effective and can be applied as a thin coating, merges a metal-organic framework with a durable polymer, outdoing the conventional one-and-done or limited-use systems currently in place.
According to a report by MIT News, this technology marries the high gas-sensitivity of the MOF, which usually degrades quickly, with the robustness and ease of processing of the polymer, that’s less sensitive. Scientists aim at an ideal balance, achieving a detector with both persistent high sensitivity and reusability, needed in real-world scenarios. Aristide Gumyusenge, the Merton C. Flemings Career Development Assistant Professor of Materials Science and Engineering, and the senior author of the study revealed, "So, we decided to use a polymer composite to achieve this reversibility," showing promise for enduring performance.
These integrated materials have showcased their ability in detecting nitrogen dioxide – a harmful gas produced by combustion and linked to various health hazards, including asthma. Impressively, the sensor maintained nearly consistent baseline performance after 100 cycles of detection, demonstrating only a 5 to 10 percent variation, signifying its potential for long-term application.
What's more, the sensor achieves a rare feat in gas detection: reversible, low-concentration detection, with proven efficiency at sensing nitrogen dioxide levels as meager as 2 parts per million. As Gumyusenge told MIT News, "we can definitely tailor the chemistry to target other volatile molecules," paving the way to customize this innovation for a variety of toxic substances. Furthermore, due to the thin composition of the films, production costs could remain minimal, offering vast industrial applications at a fraction of the current expense.
