{"id":984,"date":"2017-12-09T18:29:00","date_gmt":"2017-12-09T18:29:00","guid":{"rendered":"https:\/\/blablamaterio.com\/?p=984"},"modified":"2019-12-09T18:34:46","modified_gmt":"2019-12-09T18:34:46","slug":"avent-6-hedgehog-or-palm-tree","status":"publish","type":"post","link":"https:\/\/blablamaterio.com\/en_gb\/avent-6-hedgehog-or-palm-tree","title":{"rendered":"Avent #6: Hedgehog or Palm Tree?"},"content":{"rendered":"<p>    <strong>H\u00e9risson ou palmier?<\/strong><br>Au d\u00e9part: un liquide sombre \u00e0 l&rsquo;apparence d&rsquo;huile de vidange. Mais \u00e0 l&rsquo;approche d&rsquo;un aimant, ce liquide se h\u00e9risse de pics et prend forme, le champignon (ou palmier, h\u00e9risson,\u00a0oursin suivant votre dext\u00e9rit\u00e9) se transformant et se d\u00e9pla\u00e7ant suivant les mouvements de l&rsquo;aimant. Ce sont en fait les lignes de champs magn\u00e9tique qui se dessinent dans ce\u00a0liquide vivant, des particules de magnetite de taille nanom\u00e9trique \u00e9tant dispers\u00e9es en suspension stable collo\u00efdale dans un fluide porteur. Hormis la curiosit\u00e9 de laboratoire et le fait\u00a0qu&rsquo;il peut me distraire pendant des heures, ce liquide est utilis\u00e9 dans la production d&rsquo;enceintes acoustiques.<\/p>\n\n\n\n<p class=\"has-text-color has-vivid-red-color\"><strong>R\u00e9f\u00e9rence M0381 dans la base mat\u00e9riO<\/strong><\/p>\n\n\n\n<p><em>    <strong>Hedgehog or Palm Tree? <\/strong><br> To start with: a dark liquid that looks like motor oil. But when you approach a magnet, this liquid suddenly becomes spiky and changes shape, from a mushroom-like shape, to a palm-tree-like shape, to a hedgehog-like shape, or to an urchin-like shape depending on your dexterity and the movement of the magnet. In fact, the magnetic field lines become \u2018alive\u2019 thanks to this liquid, full of nano magnetite particles dispersed into a stable collo\u00efdal suspension in a fluid. Apart from being a laboratory curiosity, such liquids are used to make speakers.<\/em><\/p>\n\n\n\n<p class=\"has-text-color has-vivid-red-color\"><strong><em>Number M0381 in mat\u00e9riO database<\/em><\/strong><\/p>","protected":false},"excerpt":{"rendered":"<p>H\u00e9risson ou palmier?Au d\u00e9part: un liquide sombre \u00e0 l&rsquo;apparence d&rsquo;huile de vidange. Mais \u00e0 l&rsquo;approche d&rsquo;un aimant, ce liquide se h\u00e9risse de pics et prend forme, le champignon (ou palmier, h\u00e9risson,\u00a0oursin suivant votre dext\u00e9rit\u00e9) se transformant et se d\u00e9pla\u00e7ant suivant les mouvements de l&rsquo;aimant. Ce sont en fait les lignes de champs magn\u00e9tique qui se [&hellip;]<\/p>","protected":false},"author":1,"featured_media":985,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[146],"_links":{"self":[{"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/posts\/984"}],"collection":[{"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/comments?post=984"}],"version-history":[{"count":1,"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/posts\/984\/revisions"}],"predecessor-version":[{"id":986,"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/posts\/984\/revisions\/986"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/media\/985"}],"wp:attachment":[{"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/media?parent=984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/categories?post=984"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blablamaterio.com\/en_gb\/wp-json\/wp\/v2\/tags?post=984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}