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AssigneeCommissariat A L'energie Atomique Et Aux Energies Alternatives
InventorsFabien Lefloch, Muriel Matheron
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The invention relates to the use of diazonium salts for the formation of thick layers on at least one surface of a substrate. The diazonium salts used in the invention have the following formula (I): wherein R is a group that can be electrochemically reduced in a reversible manner to a cathodic potential between 0 and −1.5 V, E is a spacer chain consisting of at least one aromatic cyclic group having between 5 and 6 links, optionally containing at least one heteroatom preferably selected from N, S, O or P and optionally substituted by at least one group selected from the C1-C5 alkyls and the halogens, r is 1 or 2, m is a whole number between 1 and 5 inclusive, p is a whole number between 1 and 5, and B is a counter-ion. The invention can be especially applied to the field of gas sensors.
The use of at least one compound of formula I:
A substrate comprising at least one surface made of a conductive or semiconductive material onto which 9-dicyanofluorenylidene groups are grafted.
A device for detecting and/or quantifying gas compounds and/or volatile organic compounds (VOCs), characterized in that it comprises a substrate comprising at least one surface made of a conductive or semi-conductive material onto which are grafted 9-dicyanofluorenylidene groups.
A process for forming a layer of diazonium salt on at least one surface, made of a conductive or semi-conductive material, of a substrate, characterized in that it comprises at least one step of electrografting at least one diazonium salt of general formula I below onto said at least one surface:
A diazonium salt of formula I:
Dependencies are inferred from the claim text.