We studied the nematic liquid crystal (NLC) aligning capabilities using the new alignment material of Nitrogen doped diamond-like carbon (NDLC) thin film. The NDLC thin film exhibits high electrical resistivity and thermal conductivity that are similar to the properties shown by diamond-like carbon (DLC) thin films. The diamond-like properties and nondiamond-like bonding make NDLC an attractive candidate for applications. A high pretilt angle of about 9.9° by ion beam (IB) exposure on the NDLC thin film surface was measured. A good LC alignment is achieved by the IB alignment method on the NDLC thin film surface at annealing temperature of 200°C. The alignment defect of the NLC was observed above annealing temperature of 250°C. Consequently, the high pretilt angle and the good LC alignment by the IB alignment method on the NDLC thin film surface can be achieved.
Bibliographical noteFunding Information:
Keywords: annealing; ion Beam (IB); nematic liquid crystal (NLC); nitrogen doped diamond-like carbon (NDLC); pretilt angle This work was supported by National Research Laboratory program (M1-0203-00-0008).
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics