Publication at Faculty of Mathematics and Physics |
2015
Abstract
Nanocrystalline diamond (NCD) films may be used in biosensing after modification of their surfaces with active functional groups. Here, surface functionalization of O- and H-NCD films with amine groups was made by 2 plasma-based processes: a) RF plasma treatment in ammonia, b) the deposition of thin amine-containing plasma polymer via RF magnetron sputtering of nylon target in Ar/N-2 mixture.
Amination of the NCD films by plasma treatment in NH3 caused an attachment of 1% of primary amines but destroyed the surface conductivity of H-NCD films. The 5% concentration of -NH2 was detected on the NCD covered with the plasma polymer.
Moreover, the surface conductivity of H-NCD films reached 10(-7) S.