Phase Transition in 2D Metal Carbides (Iowa State University)
Abstract
In this three-year project, the contractor will develop a scalable synthetic approach to produce MAX crystals and a reliable and reproducible approach to exfoliate MXenes, then conduct a systematic understanding of the phase transition in MXene through a combinati"on of electrical, optical, and thermal property measurements. The ultimate goal is that at the end of the three-year period, an ""int""egrated, active, and self-recoverable"" switching device based on MXene should be demonstrated: under normal condition, these wide ba"nd gap MXene-based devices with surface terminating groups will act as integrated silent components and no or little amount of current will flow through. However, when they are subjected to voltage/current surges, heat generated by voltage/current surges will blast the ~OH groups off. It will convert the MXenes into metallic state and quickly ground the electrical devices for protection. After the voltage/current surges stop, the devices will reversibly switch back to the normal wide band gap phase through re-absorbing ~OH groups.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Aug 15, 2019
- Source ID
- N000141912518
Entities
People
- Yue Wu
Organizations
- Iowa State University
- Office of Naval Research
- United States Navy