Effect of different crystallographic properties on the electrical conductivity of two polymorphs of a spin crossover complex
In this study, the structure and transport properties of two polymorphs, nanoparticles and nanorods, of the iron(II) triazole [Fe(Htrz)<sub>2</sub>(trz)](BF<sub>4</sub>) spin crossover complex were compared. Conductive atomic force microscopy was used to map the electrical conductivity of individual nanoparticles and nanorods. The [Fe(Htrz)<sub>2</sub>(trz)](BF<sub>4</sub>) nanorods showed significantly higher conductivity compared to nanoparticles. This difference in electrical conductivity is partially associated to the different Fe-N bond lengths in each of the polymorphs, with an inverse relationship between Fe-N bond length and conductivity. Transport measurements were done on the nanorods for both high spin (at 380 K) and low spin (at 320 K) states under dark and illuminated conditions. The conductance is highest for the low spin state under dark conditions. In illumination, the conductance change is much diminished.
Authors
- David A. Shapiro (ORCID: https://orcid.org/0000-0002-4186-6017)
- Rebecca Y. Lai (ORCID: https://orcid.org/0000-0002-1732-9481)
- P. A. Dowben (ORCID: https://orcid.org/0000-0002-2198-4710)
- Jeffrey E. Shield (ORCID: https://orcid.org/0000-0002-1415-2115)
- Parag Banerjee (ORCID: https://orcid.org/0000-0003-0401-8155)
- Esha Mishra (ORCID: https://orcid.org/0000-0002-8317-9370)
- Rifat Mahbub
- M. Zaid Zaz (ORCID: https://orcid.org/0000-0001-7849-4715)
- Thilini K. Ekanayaka (ORCID: https://orcid.org/0000-0003-3650-0210)
- Kayleigh McElven
- Eric Bessel
Institutions
- Berry College (US)
- University of Central Florida (US)
- University of Nebraska–Lincoln (US)
- Lawrence Berkeley National Laboratory (US)
Publication Details
- Journal
- Journal of Physics Condensed Matter
- Published
- 2024-12-04
- DOI
- https://doi.org/10.1088/1361-648x/ad9a81
- Primary Topic
- Magnetism in coordination complexes
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Science Foundation
- U.S. Department of Energy
- University of Nebraska-Lincoln
- Office of Science
- Division of Materials Research
- Division of Electrical, Communications and Cyber Systems
- Office of Experimental Program to Stimulate Competitive Research