| Popis: |
Since the first development in 1992 by Jean Pinson’s group, electrografting based on the reduction of diazonium salts is now one of the most used techniques for surface coating. However, the conventional electroreduction of diazonium cations has been carried out only at the laboratory scale using cyclic voltammetry with a typical three-electrode electrochemical system. Thus this promising coating technique still needs simplification for industrial feasibility. This chapter covers the significant studies on pulse potential deposition, using an only two-electrode system, to graft thin vinylic polymer films of well-controlled thickness onto the conducting and semiconducting surfaces. We first discuss the mechanism of electroreduction of diazonium cations and explain how diazonium chemistry allows grafting of vinylic polymers on various surfaces. The next section of this chapter deals with the recent literature on the covalent attachment of “polyvinylpyridine-like” film on titanium nitride wafers in the semiconductor industry. Afterward, we discuss the pulse potential depositions of polyvinylpyridine and polymethylmethacrylate onto silicon semiconductor substrates. The last section provides the readers with examples of the application of these electrochemically deposited polymer films in the fabrication of micro/nanoelectromechanical systems. |
