{"id":13482,"date":"2023-07-27T04:00:05","date_gmt":"2023-07-26T22:30:05","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=13482"},"modified":"2025-04-02T04:44:20","modified_gmt":"2025-04-01T23:14:20","slug":"what-is-hematene","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/what-is-hematene\/","title":{"rendered":"What is Hematene?"},"content":{"rendered":"<h2><strong>Key findings:\u00a0<\/strong><\/h2>\n<p>&nbsp;<\/p>\n<ul>\n<li>Nanoflakes of a material called hematene extracted from iron ore have been found capable of <strong>withstanding and acting as shield from high laser intensities<\/strong>.<\/li>\n<li>Hence it could be used to make devices <strong>called optical limiters<\/strong> that can protect sensitive optical equipment from light-induced damage.<\/li>\n<li><strong>Radiation from laser sources<\/strong> is highly concentrated and powerful and can be detrimental to sensitive equipment such as sensors, detectors, and other optical devices.<\/li>\n<li>When the input intensity increases optical limiters control the amount of light that passes through, thereby preventing damage to the optical component.<\/li>\n<li>These devices are often useful in <strong>laser technologies, military, telecommunications<\/strong>, aircrafts, and scientific research in several ways.<\/li>\n<li>They found that 2D nanoflakes of hematene is capable of withstanding very high laser intensities, and they exhibited excellent optical limiting of green laser light (532 nm) while maintaining a high linear transmission (about 87%) for low-intensity light.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3><strong>Key facts about Hematene:<\/strong><\/h3>\n<ul>\n<li>It is <strong>extracted from naturally occurring hematite<\/strong>, the mineral form of iron(III) oxide, using a combination of sonication, centrifugation and vacuum-assisted filtration.<\/li>\n<li>It measures 3 atoms thick and has a more <strong>efficient photocatalysis.<\/strong><\/li>\n<li>It is <strong>ferromagnetic<\/strong> (the mechanism by which certain materials like iron form permanent magnets, or are attracted to magnets) like a common magnet.<\/li>\n<li>It is capable of withstanding and acting as shield from high laser intensities<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<h3>Q) What is an Ore?<\/h3>\n<p>Ore refers to a naturally occurring mineral or rock that contains a valuable substance, usually a metal or valuable mineral, in sufficient amounts to make mining economically feasible. These minerals or metals are typically extracted and processed to obtain the valuable elements they contain.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>Source:<\/strong>\u00a0<a href=\"https:\/\/pib.gov.in\/PressReleseDetailm.aspx?PRID=1942936\" target=\"_blank\" rel=\"nofollow noopener\"><u>2D nanoflakes of material extracted from iron ore can protect sensitive optical equipment from light-induced damage<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Hematene  is extracted from naturally occurring hematite, the mineral form of iron(III) oxide, using a combination of sonication, centrifugation and vacuum-assisted filtration.<\/p>\n","protected":false},"author":5,"featured_media":13483,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-13482","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/13482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=13482"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/13482\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/13483"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=13482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=13482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=13482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}