Liquid deposition of hydrogenated carbon films in N,N-dimethyl formamide solution

Using a pulse-modulated source, an attempt has been made to deposit diamond -like carbon films by electrodeposition in N,N-dimethyl formamide (DMF) sol ution. XPS showed the films mainly contain carbon. IR spectrum indicated th at as-deposited films are hydrogenated carbon films, and Che hydrogen mainl y bonded to sp(3) carbon. Raman spectroscopy suggested that the films conta ined a mixture of sp(3) and sp(2) carbon. For the first time, we obtained R aman scattering at 1337 cm(-1), which is very close to the characteristic R aman line of diamond located at 1332 cm(-1) except for the large linewidth. The electrical resistivity of the films is more than 10(10) Omega cm. (C) 1999 Elsevier Science B.V. All rights reserved.