Ambient-Atmosphere Compatible Superconducting Fullerenes
Abstract
The goal of this Phase I project was to evaluate different methods to produce ambient-atmosphere compatible superconducting fullerenes. Three approaches toward this goal were surveyed, (1) protective overlayers, (2) in-cage dopants, and (3) alternate dopants. A source of electrons for the conduction band derived from the lowest unoccupied molecular orbitals, other than reactive alkali metals is desired. All three methods demonstrated interesting and tantalizing results. Potassium doped fullerene films were produced in our high vacuum (HV) deposition chamber. Difficulties in transporting potassium form the shipping container to the deposition chamber were solved by the use of a kerosene/isopropanol bath. Measuring electric resistivity proved to be an effective method of monitoring the doping process. Protective overlayers of doped fullerence films were formed with various combinations of electrical conductors and insulators. The electrically insulating layers could be tested immediately at MER, while the metallic layers required cryogenic measurements.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 22, 1993
- Accession Number
- ADA262025
Entities
People
- T. A. Miller