{"id":211334,"date":"2021-03-25T22:23:24","date_gmt":"2021-03-25T19:23:24","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/fast-acting-color-changing-molecular-probe-senses-when-a-material-is-about-to-fail\/"},"modified":"2021-03-25T22:23:24","modified_gmt":"2021-03-25T19:23:24","slug":"fast-acting-color-changing-molecular-probe-senses-when-a-material-is-about-to-fail","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/fast-acting-color-changing-molecular-probe-senses-when-a-material-is-about-to-fail\/","title":{"rendered":"#Fast-acting, color-changing molecular probe senses when a material is about to fail"},"content":{"rendered":"

“#Fast-acting, color-changing molecular probe senses when a material is about to fail<\/strong>”<\/p>\n

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\"Fast-acting,
\n Beckman Institute director Jeffrey Moore, left, postdoctoral researcher Hai Qian and materials science<\/a> and engineering head Nancy Sottos led a team of Illinois engineers in the development of a new rapid-acting, reversible polymer that changes color when it is about to fail. Credit: Photo by L. Brian Stauffer
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Materials that contain special polymer molecules may someday be able to warn us when they are about to fail, researchers said. Engineers at the University of Illinois Urbana-Champaign have improved their previously developed force-sensitive molecules, called mechanophores, to produce reversible, rapid and vibrant color change when a force is app<\/a>lied.<\/p>\n


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The new study led by postdoctoral researcher Hai Qian, materials science and engineering professor and head Nancy Sottos, and Beckman Institute of Advanced Science and Technology<\/a> director Jeffrey Moore is published in the journal Chem<\/i>.<\/p>\n

Moore’s team has been working with mechanophores for more than a decade, but past efforts have produced molecules that were slow to react and return to their original state, if at all. This inability to produce an on\/off-like response has limited their use as molecular probes that continuously report a material’s mechanical condition, the study reports.<\/p>\n

“The color change is the result of stress applied to the bonds that connect the mechanophores to a polymer chain,” Qian said. “We are now bonding the mechanophores to polymer chains using a different arrangement scheme, called an oxazine structure. The new structure allows for an instantaneous and reversible color change, so instead of the polymer slowly becoming darker over time, the color changes quickly when the force is applied and disappears when the force is removed.”<\/p>\n


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