{"id":174,"date":"2024-07-15T20:24:53","date_gmt":"2024-07-16T03:24:53","guid":{"rendered":"https:\/\/dornsife.usc.edu\/kresin\/?page_id=174"},"modified":"2024-07-24T12:51:00","modified_gmt":"2024-07-24T19:51:00","slug":"helium-nanodroplets","status":"publish","type":"page","link":"https:\/\/dornsife.usc.edu\/kresin\/helium-nanodroplets\/","title":{"rendered":"Helium nanodroplets"},"content":{"rendered":"\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>By expanding high-purity helium gas at high pressure through a small cryocooled <a href=\"https:\/\/dornsife.usc.edu\/kresin\/wp-content\/uploads\/sites\/446\/2024\/07\/nozzle.jpg\" target=\"_blank\" rel=\"noopener\">nozzle<\/a> into vacuum, one obtains a supersonic beam of liquid nanodroplets He<sub>n<\/sub> (<em>n<\/em>~10<sup>3<\/sup>-10<sup>6<\/sup>). These droplets have sub-Kelvin internal temperatures and are actually superfluid. They are remarkably efficient at capturing impurity atoms and molecules in-flight. As a result, they function as transparent, inert, superfluid &#8220;nano-cryostats&#8221; for spectroscopy, control of molecular assembly and reactions, generation of unusual prototype complexes and alloys, etc.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n\n\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <h3 style=\"text-align: center;\">Nanodroplet beam apparatus<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-200 size-full\" src=\"https:\/\/dornsife.usc.edu\/kresin\/wp-content\/uploads\/sites\/446\/2024\/07\/Heliummachine.jpg\" alt=\"Photo of a helium machine with various wires and parts.\" width=\"1468\" height=\"630\" srcset=\"https:\/\/dornsife.usc.edu\/kresin\/wp-content\/uploads\/sites\/446\/2024\/07\/Heliummachine.jpg 1468w, https:\/\/dornsife.usc.edu\/kresin\/wp-content\/uploads\/sites\/446\/2024\/07\/Heliummachine-300x129.jpg 300w, https:\/\/dornsife.usc.edu\/kresin\/wp-content\/uploads\/sites\/446\/2024\/07\/Heliummachine-1024x439.jpg 1024w, https:\/\/dornsife.usc.edu\/kresin\/wp-content\/uploads\/sites\/446\/2024\/07\/Heliummachine-768x330.jpg 768w\" sizes=\"(max-width: 1468px) 100vw, 1468px\" \/><br \/>\n<a href=\"https:\/\/dornsife.usc.edu\/kresin\/wp-content\/uploads\/sites\/446\/2024\/07\/Heliummachine.jpg\" target=\"_blank\" rel=\"noopener\"><strong>Click to enlarge<\/strong><\/a><\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":17,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-174","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - 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