{"id":223077,"date":"2016-08-22T15:38:20","date_gmt":"2016-08-22T18:38:20","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/en\/?p=223077"},"modified":"2016-08-24T16:44:31","modified_gmt":"2016-08-24T19:44:31","slug":"an-unexpected-silver-cloud","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/an-unexpected-silver-cloud\/","title":{"rendered":"An unexpected silver cloud"},"content":{"rendered":"<div id=\"attachment_223078\" style=\"max-width: 300px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-223078\" src=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/08\/Tecno_Nanobac_Azul.jpg\" alt=\"Sample of silver tungstate: nanometric particle cloud circles around the material \" width=\"290\" height=\"250\" srcset=\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/08\/Tecno_Nanobac_Azul.jpg 290w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/08\/Tecno_Nanobac_Azul-120x103.jpg 120w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/08\/Tecno_Nanobac_Azul-250x216.jpg 250w\" sizes=\"auto, (max-width: 290px) 100vw, 290px\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">CDMF<\/span>Sample of silver tungstate: nanometric particle cloud circles around the material<span class=\"media-credits\">CDMF<\/span><\/p><\/div>\n<p>Studies on the chemical compound silver tungstate \u2013 a semiconductor with potential applications in fiber optics, photocatalysis (using light to accelerate the rate of a reaction) and sensors \u2013 have led to unprecedented findings by the research group headed by Professor Elson Longo of the Chemistry Institute at the S\u00e3o Paulo State University (Unesp) in Araraquara, S\u00e3o Paulo State.\u00a0 After studying the compound in 2013 and observing a spontaneous growth of silver filaments with potential antibacterial and antifungal properties (<a href=\"http:\/\/revistapesquisa.fapesp.br\/en\/2014\/02\/06\/fighting-hospital-infection\/?\" target=\"_blank\">see <em><i>Pesquisa FAPESP<\/i><\/em> Issue n\u00ba 212<\/a>), the researcher&#8217;s team discovered a cloud of nanometric silver particles circling around these filaments (<em><i>Scientific Reports<\/i><\/em>, March 16, 2016).\u00a0 \u201cThis is a new finding in scientific literature,\u201d says Longo.\u00a0 \u201cThe cloud appears when the electron beam of a transmission electron microscope hits the filaments.\u00a0 Our work builds on existing knowledge about interactions between electrons and silver tungstate.\u201d\u00a0 The nanoparticles in the cloud are 1.5 to 2 nanometers in diameter, and they coalesce like water to form bigger and bigger droplets.\u00a0 At the end of the process, more metallic silver is deposited onto the tungstate.\u00a0 Longo coordinates the Functional Materials Development Center (CDMF), one of FAPESP&#8217;s Research, Innovation and Dissemination Centers (CEPID).<\/p>\n","protected":false},"excerpt":{"rendered":"Unprecedented findings on the chemical compound silver tungstate","protected":false},"author":475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[168],"tags":[259,249],"coauthors":[785],"class_list":["post-223077","post","type-post","status-publish","format-standard","hentry","category-technoscience","tag-chemistry","tag-nanotechnology"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/223077","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=223077"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/223077\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=223077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=223077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=223077"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=223077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}