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The sheetlike morphology of the graphene nanostructures, with mean sizes in the range of hundreds of nanometers, was observed by high\u2010resolution electron microscopy. The distinctive feature found in all the samples was the regular rectangular or square shapes. This multi\u2010component organic\u2013inorganic nanomaterial was used to modify a platinum substrate and subsequently employed for the detection of carbamazepine, an anti\u2010convulsion drug. UV\/Vis spectroscopy revealed that a strong hypochromism occurred over time, after mixing solutions of graphene\u2013Au\u2013Ag with carbamazepine. This can be attributed to \u03c0\u2013\u03c0 stacking between the aromatic groups of the two compounds. Linear sweep voltammetry (LCV) provided evidence that the modified platinum substrate presented a significant electrocatalytic reaction toward the oxidation of carbamazepine. The intensity of the current was found to increase by up to 2.5 times, and the oxidation potential shifted from +1.5 to +1.35 V(Ag\/AgCl) in comparison with the unmodified electrode. Electrochemical impedance spectroscopy (EIS) was further used to thoroughly assess the activity of the platinum electrode that was modified by the deposition of the Gr\u2010Au\u2010Ag composites in the presence of various concentrations of carbamazepine. The experimental EIS records were used for the generation of an equivalent electrical circuit, based on the charge\u2010transfer resistance (<jats:italic>R<\/jats:italic><jats:sub>ct<\/jats:sub>), Warburg impedance (<jats:italic>Z<\/jats:italic><jats:sub>D<\/jats:sub>), solution resistance (<jats:italic>R<\/jats:italic><jats:sub>s<\/jats:sub>), and a constant phase element (CPE) that characterizes the non\u2010ideal interface capacitive responses.<\/jats:p>","DOI":"10.1002\/cphc.201200424","type":"journal-article","created":{"date-parts":[[2012,8,27]],"date-time":"2012-08-27T16:37:43Z","timestamp":1346085463000},"page":"3632-3639","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Novel Multifunctional Graphene Sheets with Encased Au\/Ag Nanoparticles for Advanced Electrochemical Analysis of Organic Compounds"],"prefix":"10.1002","volume":"13","author":[{"given":"Stela","family":"Pruneanu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandru R.","family":"Biris","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Florina","family":"Pogacean","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diana Mihaela","family":"Lazar","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stefania","family":"Ardelean","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fumyia","family":"Watanabe","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Enkeleda","family":"Dervishi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alexandru S.","family":"Biris","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2012,8,27]]},"reference":[{"key":"e_1_2_6_1_2","first-page":"323202","volume":"20","author":"Hass J.","year":"2008","journal-title":"J. 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