Electronic transport properties of spin-crossover polymer plus polyaniline composites with Fe3O4 nanoparticles

Esha Mishra; WaiKiat Chin; Kayleigh A McElveen; Thilini K Ekanayaka; M Zaid Zaz; Gauthami Viswan; Ruthi Zielinski; Alpha T N’Diaye; David Shapiro; Rebecca Y Lai; Robert Streubel; Peter A Dowben

doi:10.1088/2515-7639/ad1b35

JPhys Materials (Jan 2024)

Electronic transport properties of spin-crossover polymer plus polyaniline composites with Fe3O4 nanoparticles

Esha Mishra,
WaiKiat Chin,
Kayleigh A McElveen,
Thilini K Ekanayaka,
M Zaid Zaz,
Gauthami Viswan,
Ruthi Zielinski,
Alpha T N’Diaye,
David Shapiro,
Rebecca Y Lai,
Robert Streubel,
Peter A Dowben

Affiliations

Esha Mishra: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America; Department of Physics, Berry College , Mount Berry, GA 30149, United States of America
WaiKiat Chin: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
Kayleigh A McElveen: ORCiD; Department of Chemistry, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
Thilini K Ekanayaka: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
M Zaid Zaz: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
Gauthami Viswan: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
Ruthi Zielinski: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
Alpha T N’Diaye: ORCiD; Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley, CA 94720, United States of America
David Shapiro: ORCiD; Advanced Light Source, Lawrence Berkeley National Laboratory , Berkeley, CA 94720, United States of America
Rebecca Y Lai: ORCiD; Department of Chemistry, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
Robert Streubel: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America; Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America
Peter A Dowben: ORCiD; Department of Physics and Astronomy, University of Nebraska-Lincoln , Lincoln, NE 68588, United States of America

DOI: https://doi.org/10.1088/2515-7639/ad1b35
Journal volume & issue: Vol. 7, no. 1
p. 015010

Abstract

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Adding Fe _3 O _4 nanoparticles to composites of [Fe(Htrz) _2 (trz)](BF _4 ) spin-crossover polymer and polyaniline (PANI) drives a phase separation of both and restores the molecular structure and cooperative effects of the spin-crossover polymer without compromising the increased conductivity gained through the addition of PANI. We observe an increased on-off ratio for the DC conductivity owing to an enlarged off state resistivity and a 20 times larger AC conductivity of the on state compared with DC values. The Fe _3 O _4 nanoparticles, primarily confined to the [Fe(Htrz) _2 (trz)](BF _4 ) phase, are ferromagnetically coupled to the local moment of the spin-crossover molecule suggesting the existence of an exchange interaction between both components.

Published in JPhys Materials

ISSN: 2515-7639 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Science: Physics
Website: https://iopscience.iop.org/journal/2515-7639

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