Ion trapping by the graphene electrode in a graphene-ITO hybrid liquid crystal cell
Abstract
A monolayer graphene coated glass slide and an indium tin oxide (ITO) coated glass slide with a planar-aligning polyimide layer were placed together to make a planar hybrid liquid crystal (LC) cell. The free-ion concentration in the LC was found to be significantly reduced in the graphene-ITO hybrid cell compared to that in a conventional ITO-ITO cell. The free-ion concentration was suppressed in the hybrid cell due to the graphene-electrode's ion trapping process. The dielectric anisotropy of the LC was found to increase in the hybrid cell, indicating an increase in the nematic order parameter of the LC due to the reduction of ionic impurities.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 16, 2017
- Source ID
- 10.1063/1.4998423
Entities
People
- Andrew R Lee
- Rajratan Basu
Organizations
- Office of Naval Research
- United States Naval Academy