{"id":8540,"date":"2021-05-04T10:46:33","date_gmt":"2021-05-04T08:46:33","guid":{"rendered":"http:\/\/www.cinam.univ-mrs.fr\/cinam\/?p=8540"},"modified":"2021-05-04T11:34:30","modified_gmt":"2021-05-04T09:34:30","slug":"surface-enhanced-infrared-absorption-seira-on-volatile-organic-compounds-is-enabled-by-the-concerted-action-of-resonant-nano-antennas-and-nanosize-zeolites","status":"publish","type":"post","link":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/2021\/05\/04\/surface-enhanced-infrared-absorption-seira-on-volatile-organic-compounds-is-enabled-by-the-concerted-action-of-resonant-nano-antennas-and-nanosize-zeolites\/","title":{"rendered":"Surface Enhanced Infrared Absorption (SEIRA) on volatile organic compounds is enabled by the concerted action of resonant nano-antennas and nanosize zeolites."},"content":{"rendered":"<div class=\"\">The ability to detect\u00a0trace\u00a0amount (ppb) of volatile organic compounds, such as\u00a0benzene, in\u00a0real-time\u00a0is of paramount importance to\u00a0assess\u00a0the long-term impact of pollution, to\u00a0verify\u00a0whether\u00a0industries comply with imposed standards, and ultimately to\u00a0support\u00a0regulatory authorities to define new guidelines.<\/div>\n<div class=\"\">Although\u00a0infrared spectroscopy\u00a0can readily identify chemical species without prior knowledge, portable systems are not suitable to detect trace amount, due to the\u00a0small absorption cross-section\u00a0of molecular vibrations, requiring long optical paths. Attempts to\u00a0boost light-matter interaction\u00a0by means of optical resonances have been successful in amplifying the molecular\u00a0fingerprint via the so called Surface Enhanced Infrared Absorption (SEIRA) mechanism. Despite the tremendous potential,\u00a0SEIRA\u00a0has been mostly limited to solid-state monolayers adsorbed\u00a0from the liquid phase onto the resonant nano-antennas, while the detection of\u00a0gas traces still remains elusive, due to the evanescent nature of such resonances.<br class=\"\" \/>In this work, we establish a new strategy that combines in an\u00a0ultra-thin functional layer\u00a0the benefits of\u00a0SEIRA\u00a0with those of\u00a0sorbent materials\u00a0that can adsorb volatile compounds at very\u00a0low partial pressures.<br class=\"\" \/>Resonant nano-antennas\u00a0are coated at room temperature by a layer of\u00a0nanosized zeolites, that\u00a0traps\u00a0molecules in the near vicinity of the nano-antennas to take full\u00a0advantage of the amplified electromagnetic field. Performance equivalent to a\u00a0~120 m\u00a0long optical path is achieved with such a functional layer that is only\u00a0~200 nm\u00a0thin\u00a0(8 orders of magnitude thinner).<\/div>\n<div class=\"\">We demonstrate the\u00a0potential\u00a0of our strategy by detecting benzene at a concentration of\u00a025 ppb in less than 10 minutes\u00a0with a standard FTIR spectrometer. This sets a new\u00a0record\u00a0for the\u00a0real-time detection of benzene from its vibrational fingerprint.<\/div>\n<div>For more information : <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/adfm.202101623\">https:\/\/onlinelibrary.wiley.com\/doi\/abs\/10.1002\/adfm.202101623<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A new publication in NM Department<\/p>\n","protected":false},"author":16,"featured_media":8549,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[31],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts\/8540"}],"collection":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/users\/16"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/comments?post=8540"}],"version-history":[{"count":4,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts\/8540\/revisions"}],"predecessor-version":[{"id":8548,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/posts\/8540\/revisions\/8548"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/media\/8549"}],"wp:attachment":[{"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/media?parent=8540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/categories?post=8540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cinam.univ-mrs.fr\/cinam\/en\/wp-json\/wp\/v2\/tags?post=8540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}