Paramagnetic properties of RE based supramolecular structures: Design, synthesis, and atomic scale characterization of rare-earth based supramolecular nano-graphene and nanoribbons

Project: Research project

Project Details

Description

The overarching goal of the project is to develop efficient emissive materials using RE salt mixtures, crude materials of much lower added value than purified RE metals. Such a development requires fine tuning the properties of the RE ions, which in turn demands systematic control over the RE ion coordination, structural, and electronic environment down to the atomic level.

In this part of the project we will focus on identification of paramagnetic properties of RE elements using their electron and nuclear spin properties. We will apply continuous wave (CW) electron paramagnetic resonance (EPR) to identify paramagnetic species by exploring their magnetic moments that report on the character of the orbits in which they reside, as well as their interaction with magnetic nuclei reporting on their environment surrounds them. We will also use pulse EPR in order to study and manipulate electron and nuclear spin dynamics. By applying short microwave pulses of different duration and spacing, this technique enables remote perturbation of spin alignment in the magnetic field and consequent controlled interaction with spin environment. The measurements will be performed at low (He) temperatures. Three people will be working on this part of the project:

Dr. Tijana Rajh, Co-Principal Investigator, Arizona State University (ASU)
Dr. Rajh will be responsible for the low temperature electron paramagnetic resonance (LT-EPR) experiments. She will supervise postdoctoral appointee to work on EPR experiments of RE-based supramolecular structures.

Postdoctoral Associate
The postdoctoral associates primary duties are to conduct low temperature EPR spectroscopy measurements on rare-earth supramolecular structures to understand the characteristics of 4f electron spins, under the guidance of Dr. Tijana Rajh. S/he will work on this project for 12 calendar months each year.

Graduate Research Assistant
The graduate student will work on preparation and characterization of RE samples for EPR, optical characterization and the EasySpin simulation of EPR results under the guidance of Dr. Tijana Rajh. S/he will work on this project for one semester per year (4.5 academic months).

StatusActive
Effective start/end date7/1/216/30/22

Funding

  • US Department of Energy (DOE): $150,000.00

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