Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5367006 | Applied Surface Science | 2011 | 7 Pages |
Radiofrequency plasma polymerization in combination with direct current reactive magnetron sputtering is utilized for the synthesis of TiO2/plasma polymerized aniline nanocomposite thin films. In the composite film, X-ray diffraction measurements reveal formation of nanocrystalline rutile TiO2 of crystallite size 3.6Â nm. Due to continuous bombardment of plasma species during simultaneous magnetron sputtering and plasma polymerization, the precursors of polymerization are broken and few functional groups are retained in the composite film. The plasma polymerized aniline has the direct optical band gap of 3.55Â eV and the nanocrystalline rutile TiO2 is wide gap semiconductor with indirect gap of 3.20Â eV which suggests the existence of an energy barrier at the interface in the composite form. The ac conductivity of composite film shows significant improvement as compared to plasma polymerized aniline film and sputtered rutile TiO2 film. The composite film may find potential application as antistatic coatings.
⺠We prepare TiO2/polyaniline films by sputtering combined with plasma polymerization. ⺠Rutile-TiO2/polyaniline composite film of crystallite size 3.6 nm is reported. ⺠Colorless composite having small crystallite size is useful as antistatic coating. ⺠Nanocomposite shows improvement of conductivity compared to polyaniline and TiO2.