{"id":3113,"date":"2023-01-19T13:30:30","date_gmt":"2023-01-19T08:00:30","guid":{"rendered":"https:\/\/staging.asminternational.org\/edfas\/blocking-radio-waves-and-electromagnetic-interference-with-the-flip-of-a-switch\/"},"modified":"2023-01-19T13:30:30","modified_gmt":"2023-01-19T08:00:30","slug":"blocking-radio-waves-and-electromagnetic-interference-with-the-flip-of-a-switch","status":"publish","type":"post","link":"https:\/\/www.asminternational.org\/edfas\/results\/-\/journal_content\/56\/10192\/51285235\/NEWS\/","title":{"rendered":"Blocking radio waves and electromagnetic interference with the flip of a switch"},"content":{"rendered":"

\"\"Researchers in Drexel University\u2019s College of Engineering have developed a thin film device fabricated by spray coating that can block electromagnetic radiation with the flip of a switch. The breakthrough, enabled by versatile two-dimensional materials called MXenes, could adjust the performance of electronic devices, strengthen wireless connections, and secure mobile communications against intrusion.<\/p>\n

The team previously demonstrated that two-dimensional layered MXene materials \u2013 discovered just over a decade ago \u2013 when combined with an electrolyte solution, can be turned into a potent active shield against electromagnetic waves. This latest MXene discovery, reported in Nature Nanotechnology, shows how this shielding can be tuned when a small voltage \u2013 less than that produced by an alkaline battery \u2013 is applied.<\/p>\n

MXene is a unique material in that it is highly conductive making it perfectly suited for reflecting microwave radiation that could cause static, feedback, or diminish the performance of communications devices. But its internal chemical structure can also be temporarily altered to allow these electromagnetic waves to pass through.<\/p>\n

This means that a thin coating on a device or electrical components prevents them from both emitting electromagnetic waves, as well as being penetrated by those emitted by other electronics. Eliminating the possibility of interference from both internal and external sources can ensure the performance of the device, but some waves must be allowed to exit and enter when it is being used for communication.<\/p>\n

The key to eliciting bidirectional tunability of MXene\u2019s shielding property is using the flow and expulsion of ions to alternately expand and compress the space between material\u2019s layers, like an accordion, as well as to change the surface chemistry of MXenes.<\/p>\n

With a small voltage applied to the film, ions enter \u2013 or intercalate \u2013 between the MXene layers altering the charge of their surface and inducing electrostatic attraction, which serves to change the layer spacing, the conductivity and shielding efficiency of the material. When the ions are deintercalated as the current is switched off, the MXene layers return to their original state.<\/p>\n

The team tested 10 different MXene-electrolyte combinations, applying each via paint sprayer in a layer about 30 to 100 times thinner than a human hair. The materials consistently demonstrated the dynamic tunability of shielding efficiency in blocking microwave radiation, which is impossible for traditional metals like copper and steel. And the device sustained the performance through more than 500 charge-discharge cycles.<\/p>\n

These results indicate that the MXene films can convert from electromagnetic interference shielding to quasi-electromagnetic wave transmission by electrochemical oxidation of MXenes. The MXene film can potentially serve as a dynamic EMI shielding switch.
\nFor security applications, the team suggests that the MXene shielding could hide devices from detection by radar or other tracing systems. The team also tested the potential of a one-way shielding switch. This would allow a device to remain undetectable and protected from unauthorized access until it is deployed for use.<\/p>\n

The next step for the team is to explore additional MXene-electrolyte combinations and mechanisms to fine-tune the shielding to achieve a stronger modulation of electromagnetic wave transmission and dynamic adjustment to block radiation at a variety of bandwidths.<\/p>\n

 <\/p>\n

For more information:<\/p>\n

Drexel University<\/p>\n

https:\/\/drexel.edu<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Researchers in Drexel University\u2019s College of Engineering have developed a thin film device fabricated by spray coating that can block electromagnetic radiation with the flip of a switch. The breakthrough, enabled by versatile two-dimensional materials called MXenes, could adjust the performance of electronic devices, strengthen wireless connections, and secure mobile communications against intrusion. The team… View Article<\/a><\/p>\n","protected":false},"author":63080,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[448,446,457,434,444,437,458,435,436,459,1],"tags":[],"class_list":["post-3113","post","type-post","status-publish","format-standard","hentry","category-aerospace-and-defense","category-consumer-products","category-electronic-materials","category-electronics","category-industries-and-applications","category-materials-testing-and-evaluation","category-metallography-and-microstructures","category-news","category-news-articles","category-nonmetallic-engineering-materials","category-uncategorized"],"yoast_head":"\nBlocking radio waves and electromagnetic interference with the flip of a switch - Electronic Device Failure Analysis Society<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.asminternational.org\/edfas\/results\/-\/journal_content\/56\/10192\/51285235\/NEWS\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Blocking radio waves and electromagnetic interference with the flip of a switch - Electronic Device Failure Analysis Society\" \/>\n<meta property=\"og:description\" content=\"Researchers in Drexel University\u2019s College of Engineering have developed a thin film device fabricated by spray coating that can block electromagnetic radiation with the flip of a switch. 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