Device for electrochemically releasing a composition in a controlled manner

Abstract

According to a first aspect, the invention relates to a device ( 10 ) for electrochemically releasing a composition and comprising: one working electrode ( 30 ) comprising an electroactive conjugated polymer ( 40 ) containing or doped with said composition, a counter electrode ( 50 ), and a reference electrode ( 60 ). The device ( 10 ) is characterized in that it comprises electrical means ( 95, 100; 320; 165, 180 ) connected to the working electrode ( 30 ) and to the counter electrode ( 50 ) for obtaining at said working electrode ( 30 ) at least one composition releasing sequence ( 65 ) with respect to said reference electrode ( 60 ), each composition releasing sequence ( 65 ) comprising: a first voltametric pulse ( 70 ), followed by a rest period ( 80 ) during which no current is able to flow through said working electrode ( 30 ), followed by a second voltametric pulse ( 90 ), followed by an intermediate period ( 160 ) during which no current is able to flow through said working electrode ( 30 ).

1 . A device ( 10 ) for a controlled electrochemical release of a composition and comprising:
 at least one working electrode ( 30 ) comprising an electroactive conjugated polymer ( 40 ) containing or doped with said composition;   a counter electrode ( 50 );   a reference electrode ( 60 );   
       characterized in that said device ( 10 ) further comprises:
 electrical means ( 95 ,  100 ;  320 ;  165 ,  180 ) connected to the at least one working electrode ( 30 ) and to the counter electrode ( 50 ) for obtaining at said at least one working electrode ( 30 ) at least one composition releasing sequence ( 65 ) with respect to said reference electrode ( 60 ), each composition releasing sequence ( 65 ) comprising: 
 a first voltametric pulse ( 70 ) for releasing said composition, having a first voltage, a first polarity and a first duration, followed by 
 a rest period ( 80 ) during which no current is able to flow through said at least one working electrode ( 30 ), followed by 
 a second voltametric pulse ( 90 ) for replacing said composition with at least one ion, having a second voltage, a second polarity opposite to said first polarity and a second duration, followed by 
 an intermediate period ( 160 ) during which no current is able to flow through said at least one working electrode ( 30 ), at the end of which another composition releasing sequence ( 65 ) may be applied. 
 
     
     
         2 - 15 . (canceled)