{"id":23348,"date":"2022-09-02T09:54:42","date_gmt":"2022-09-02T04:09:42","guid":{"rendered":"https:\/\/www.revoscience.com\/en\/?p=23348"},"modified":"2022-09-02T10:06:08","modified_gmt":"2022-09-02T04:21:08","slug":"windows-gain-a-competitive-edge-over-global-warming","status":"publish","type":"post","link":"https:\/\/www.revoscience.com\/en\/windows-gain-a-competitive-edge-over-global-warming\/","title":{"rendered":"Windows gain a competitive edge over global warming"},"content":{"rendered":"\n

A French-Japanese research collaboration has fabricated metal nanocomposite coatings that improve the insulating properties of window glasses. <\/p>\n\n\n\n

The new coating prevents a significant portion of near-infrared (NIR) and ultraviolet rays (UV) from passing through, while at the same time admitting visible light. The findings were\u00a0reported<\/a>\u00a0in the Journal\u00a0Science and Technology of Advanced Materials.<\/em><\/p>\n\n\n\n

\"\"
The nanoclusters are dispersed in a PVP matrix that is then coated on ITO glass to block NIR and UV rays while letting visible light pass through.<\/em><\/figcaption><\/figure>\n\n\n\n

\u00a0\u201cAlthough the fabrication of a commercial product is still a long way ahead, our work demonstrated a significant improvement in UV and NIR blocking properties compared to previous research,\u201d says solid-state chemist Fabien Grasset, research director at the French National Centre for Scientific Research (CNRS).<\/p>\n\n\n\n

\u00a0\u201cBuildings account for a large part of global energy consumption,\u201d explains Grasset, \u201cwith a large amount of the annual energy consumption of a standard building going to cooling and\/or heating systems to maintain indoor temperatures at comfortable levels.\u201d <\/p>\n\n\n\n

International collaboration is developing coating materials that could make windows better insulators.<\/em><\/strong><\/p><\/blockquote>\n\n\n\n

Scientists are looking for ways to develop window glass coatings that can block the entry of NIR radiation so that buildings, and even cars, can consume less energy to keep it cool inside. However, this needs to be done in a way that still allows visible light to enter. Ideally, harmful UV rays would also be blocked.<\/p>\n\n\n\n

To this end, the international French-Japanese research collaboration fabricated and analyzed the performance of nanocomposites based on niobium-tantalum cluster compounds containing chloride or bromide ions.<\/p>\n\n\n\n

They found that chloride-based nanoclusters provided the best performance in terms of blocking NIR and UV rays and allowing the passage of visible light. NIR and UV blocking by the nanoclusters depended on their concentration, dispersion, and oxidation state. By tuning these parameters, the team was able to improve the nanocluster performance.<\/p>\n\n\n\n

The nanoclusters were dispersed into a polyvinylpyrrolidone (PVP) matrix that was then coated onto indium-tin-oxide (ITO) glass. The combination increased the transmittance of visible light while reducing that of NIR and UV rays, relative to previous research. \u201cThese are very promising coating materials that block the most troublesome NIR wavelengths,\u201d says Grasset.<\/p>\n\n\n\n

\u201cWe have a long history of Japanese-French collaboration,\u201d he continues. \u201cWe were already convinced that we are stronger working together by mixing our different cultures and ways of thinking. The international LINK project has reinforced this belief. We will continue to do our best to make further progress towards finding solutions for the global warming problem.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

A French-Japanese research collaboration has fabricated metal nanocomposite coatings that improve the insulating properties of window glasses. <\/p>\n","protected":false},"author":2,"featured_media":23349,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-23348","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research"],"featured_image_urls":{"full":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",2560,1711,false],"thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-200x200.jpg",200,200,true],"medium":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-599x400.jpg",599,400,true],"medium_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-768x513.jpg",750,501,true],"large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-675x451.jpg",675,451,true],"1536x1536":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-1536x1027.jpg",1536,1027,true],"2048x2048":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-2048x1369.jpg",2048,1369,true],"ultp_layout_landscape_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",1197,800,false],"ultp_layout_landscape":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",853,570,false],"ultp_layout_portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",600,401,false],"ultp_layout_square":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",600,401,false],"newspaper-x-single-post":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-760x490.jpg",760,490,true],"newspaper-x-recent-post-big":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-550x360.jpg",550,360,true],"newspaper-x-recent-post-list-image":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-95x65.jpg",95,65,true],"web-stories-poster-portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",640,428,false],"web-stories-publisher-logo":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",96,64,false],"web-stories-thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2022\/09\/nanoclusters-are-dispersed-in-a-PVP-matrix-scaled.jpg",150,100,false]},"author_info":{"info":["RevoScience"]},"category_info":"Research<\/a>","tag_info":"Research","comment_count":"0","_links":{"self":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/23348","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/comments?post=23348"}],"version-history":[{"count":0,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/23348\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media\/23349"}],"wp:attachment":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media?parent=23348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/categories?post=23348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/tags?post=23348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}