{"id":613222,"date":"2024-07-17T14:03:54","date_gmt":"2024-07-17T18:03:54","guid":{"rendered":"https:\/\/www.rochester.edu\/newscenter\/?p=613222"},"modified":"2024-07-17T14:03:54","modified_gmt":"2024-07-17T18:03:54","slug":"heat-transfer-mapping-luminescent-nanoparticles-613222","status":"publish","type":"post","link":"https:\/\/www.rochester.edu\/newscenter\/heat-transfer-mapping-luminescent-nanoparticles-613222\/","title":{"rendered":"New technique pinpoints nanoscale \u2018hot spots\u2019 in electronics to improve their longevity"},"content":{"rendered":"

Borrowing methods from biological imaging, Rochester engineers have developed a way to spot tiny, overheated components that cause electronics\u2019 performance to degrade.<\/h2>\n

When electronic devices like laptops or smartphones overheat, they are fundamentally suffering from a nanoscale heat transfer problem. Pinpointing the source of that problem can be like trying to find a needle in a haystack.<\/p>\n

\u201cThe building blocks of our modern electronics are transistors with nanoscale features, so to understand which parts of overheating, the first step is to get a detailed temperature map,\u201d says Andrea Pickel<\/a>, an assistant professor from the University of Rochester<\/a>\u2019s Department of Mechanical Engineering<\/a> and a scientist with the Laboratory for Laser Energetics<\/a>. \u201cBut you need something with nanoscale resolution to do that.\u201d<\/p>\n

Existing optical thermometry techniques are impractical because they have fundamental limits on the spatial resolution they can achieve. So Pickel and her materials science PhD<\/a> students Ziyang Ye and Benjamin Harrington engineered a new approach to overcome these limitations by leveraging Nobel Prize in Chemistry\u2013winning optical super-resolution fluorescence microscopy techniques<\/a> used in biological imaging. In a new Science Advances<\/em> study<\/a>, the researchers outline their process for mapping heat transfer using luminescent nanoparticles.<\/p>\n

\"A
NOBEL NOD:<\/strong>\u00a0Materials science PhD student Benjamin Harrington uses a wire bonder to add electrical connections to an electrical heater structure. The structure was designed as a test subject for a new heat mapping technique that leverages Nobel Prize in Chemistry\u2013winning optical super-resolution fluorescence microscopy techniques. (University of Rochester \/ J. Adam Fenster)<\/figcaption><\/figure>\n

By applying highly doped upconverting nanoparticles to the surface of a device, the researchers were able to achieve super-high resolution thermometry at the nanoscale level from up to 10 millimeters away. According to Pickel, that distance is extremely far in the world of super-resolution microscopy and that the biological imaging techniques they used for inspiration typically operate less than one millimeter away.<\/p>\n

Pickel says that while the biological imaging techniques provide great inspiration, applying them to electronics had significant hurdles because they involve such different materials.<\/p>\n

\u201cOur requirements are very different from biologists because they\u2019re looking at things like cells and water-based materials,\u201d she says. \u201cOften, they might have a liquid like water or an oil between their objective lens and their sample. That\u2019s great for biological imaging, but if you\u2019re working with an electronic device, that\u2019s the last thing you want.\u201d<\/p>\n

\"Close
DOWN TO THE WIRE:<\/strong> Rochester researchers demonstrated their super-high resolution thermometry techniques on an electrical heater structure that the team designed to produce sharp temperature gradients. (University of Rochester photo \/ J. Adam Fenster)<\/figcaption><\/figure>\n

The paper demonstrates the technique using an electrical heater structure that the team designed to produce sharp temperature gradients, but Pickel says their method can be used by manufacturers to improve a wide array of electrical components. To further improve the process, the team hopes to lower the laser power used and refine the methods for applying layers of nanoparticles to the devices.<\/p>\n

The research was supported by the National Science Foundation and a University of Rochester Furth Fund Award.<\/p>\n","protected":false},"excerpt":{"rendered":"

Rochester engineers have developed a way to spot tiny, overheated components that cause electronics\u2019 performance to degrade.<\/p>\n","protected":false},"author":1242,"featured_media":613582,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[116],"tags":[23312,18632,5296,37312,18572],"class_list":["post-613222","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sci-tech","tag-department-of-mechanical-engineering","tag-hajim-school-of-engineering-and-applied-sciences","tag-laboratory-for-laser-energetics","tag-materials-science-program","tag-research-finding"],"acf":[],"yoast_head":"\nNew technique pinpoints nanoscale \u2018hot spots\u2019 in electronics to improve their longevity<\/title>\n<meta name=\"description\" content=\"University of Rochester engineers have developed a heat transfer mapping process that uses luminescent 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