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In this work, we measured the surface tension and the contact angles on both hydrophilic and hydrophobic surfaces in a temperature range as wide as possible. Based on the wettability data, the polarity fractions were estimated using the Fowkes theory. The peculiar surface behavior observed was tentatively attributed to the presence of mesophases.<\/jats:p>","DOI":"10.1063\/1.3549122","type":"journal-article","created":{"date-parts":[[2011,2,16]],"date-time":"2011-02-16T02:45:53Z","timestamp":1297824353000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":14,"title":["Peculiar surface behavior of some ionic liquids based on active pharmaceutical ingredients"],"prefix":"10.1063","volume":"134","author":[{"given":"Jos\u00e9","family":"Restolho","sequence":"first","affiliation":[{"name":"Instituto Superior T\u00e9cnico 1 Centro de Qu\u00edmica Estrutural, , T U Lisbon, Av. 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