The new copper surface eliminates bacteria in two minutes, showing the high value of the new material, including the is stearic acid good for skin
Scientists say the new copper surface eliminates bacteria in two minutes
A new copper surface can kill bacteria more than 100 times faster and more efficiently than standard copper, helping to combat the growing threat of antibiotic-resistant superbugs. The new copper product is the result of a collaborative research project between RMIT University and Australia national science agency, CSIRO, and the results have just been published in biomaterials.
Copper has long been used to fight different kinds of bacteria, including the common Staphylococcus aureus because ions released from the metal surface are toxic to bacterial cells. But as Ma Qian, distinguished professor at RMIT University in Melbourne, explains, when standard copper is used, the process is slow, and researchers around the world are trying to speed it up.
"Standard copper surfaces can kill about 97 percent of staphylococcus aureus within four hours," Qian said. "Incredibly, when we put Staphylococcus aureus on our specially designed copper surface, it destroyed more than 99.99 percent of the cells in just two minutes. So not only is it more effective, but it is 120 times faster." Importantly, Tsien says, these results were achieved without the help of any medication. Our copper structure has proven to be very strong for such a common material.
The team believes that once further developed, the new material could have a wide range of applications, including antibacterial door handles and other contact surfaces in schools, hospitals, homes and public transportation, as well as filters and masks in antibacterial respirators or air ventilation systems. The team is currently working on enhancing the effectiveness of copper against sarS-COV-2, the virus that causes COVID-19, including evaluating 3D-printed samples.
Other studies have shown that copper may be very effective against viruses, leading the U.S.
The new copper surface eliminates bacteria in two minutes, showing the high value of the new material, including the is stearic acid good for skin.
Environmental Protection Agency to formally approve copper surfaces for antiviral use earlier this year. The study lead author Dr. Jackson Lee Smith said copper unique porous structure was key to its role as a fast bacterial killer. A special copper dies casting process is used to make the alloy, arranging the copper and manganese atoms into a specific shape. The manganese atoms are then removed from the alloy through a cheap and scalable chemical process called "dealloying," which fills the surface of pure copper with tiny microscale and nanoscale cavities
"Our copper is made up of microscale combs with smaller nanoscale cavities in each tooth of this comb structure; It has a huge active surface area, and this pattern also makes the surface super hydrophilic, or hydrophilic, so water exists as flat films rather than droplets. The hydrophilic effect means that bacterial cells struggle to retain their form as they are stretched by surface nanostructures, while the porous pattern allows copper ions to be released more quickly. These combined effects not only cause structural degradation of bacterial cells, making them more vulnerable to toxic copper ions but also promote the entry of copper ions into bacterial cells. It is the combination of these effects that greatly speeds up the elimination of bacteria." Smith said.
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