{"id":260824,"date":"2018-08-06T13:18:55","date_gmt":"2018-08-06T16:18:55","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/?p=260824"},"modified":"2018-08-06T13:18:55","modified_gmt":"2018-08-06T16:18:55","slug":"sensors-for-electronic-tongues","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/sensors-for-electronic-tongues\/","title":{"rendered":"Sensors for electronic tongues"},"content":{"rendered":"<p>Physicists from S\u00e3o Carlos and Campinas, in the state of S\u00e3o Paulo, have developed a high-precision technique for manufacturing microsensors used in the flavor detection systems of electronic tongues. These systems use microscopic sensors to identify differences in the electrical properties of aqueous solutions. The new microsensor production method uses ultrashort laser pulses to cut extremely fine films from a graphene-based polymer placed on a glass surface. Lasting a fraction of a second, the laser pulse gives operators greater control over the amount of energy hitting the film, allowing them to make more precise cuts and perforations. In the experiments, the group led by Cleber Mendon\u00e7a, a professor at the University of S\u00e3o Paulo (USP) in S\u00e3o Carlos, used the laser to sculpt microsensors in polyacrylic acid graphene films, a biodegradable and bioabsorbent polymer. &#8220;One of the advantages of the technique is that it can produce sensors with complex geometries in different atmospheres, without the need for clean rooms or masks,&#8221; explains physicist Kelly Tasso de Paula, a PhD student from Mendon\u00e7a and lead author of the study. In initial tests, the microsensor distinguished pure water from solutions containing sugar, cooking salt, and hydrochloric acid (<em>Optics and Laser Technology<\/em>, May).<\/p>\n","protected":false},"excerpt":{"rendered":"Physicists have developed a high-precision technique for manufacturing microsensors used in the flavor detection systems of electronic tongues","protected":false},"author":475,"featured_media":260825,"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":[1651],"tags":[235],"coauthors":[785],"class_list":["post-260824","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-notes","tag-physics"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/260824","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=260824"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/260824\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media\/260825"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=260824"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=260824"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=260824"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=260824"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}