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Electron Spin Polarization and Rectification Driven by Chiral Perylene Diimide-Based Nanodonuts.
Ko, Chih-Hung; Zhu, Qirong; Bullard, George; Tassinari, Francesco; Morisue, Mitsuhiko; Naaman, Ron; Therien, Michael J.
Affiliation
  • Ko CH; Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.
  • Zhu Q; Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
  • Bullard G; Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.
  • Tassinari F; Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
  • Morisue M; Department of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
  • Naaman R; Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
  • Therien MJ; Department of Chemistry, Duke University, Durham, North Carolina 27708, United States.
J Phys Chem Lett ; 14(45): 10271-10277, 2023 Nov 16.
Article in En | MEDLINE | ID: mdl-37939254
The chirality-induced spin selectivity (CISS) effect allows thin-film layers of chiral conjugated molecules to function as spin filters at ambient temperature. Through solvent-modulated dropcasting of chiral l- and d-perylene diimide (PDI) monomeric building blocks, two types of aggregate morphologies, nanofibers and nanodonuts, may be realized. Spin-diode behavior is evidenced in the nanodonut structures. Stacked PDI units, which form the conjugated core of these nanostructures, dominate the nanodonut-Au electrode contact; in contrast, the AFM tip contacts largely the high-resistance solubilizing alkyl chains of the chiral monomers that form these nanodonuts. Current-voltage responses of the nanodonuts, measured by magnetic conductive AFM (mC-AFM), demonstrate substantial spin polarizations as well as spin current rectification ratios (>10) that exceed the magnitudes of those determined to date for other chiral nanoscale systems. These results underscore the potential for chiral nanostructures, featuring asymmetric molecular junctions, to enable CISS-based nanoscale spin current rectifiers.

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: J Phys Chem Lett Year: 2023 Document type: Article Affiliation country: Country of publication:

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: J Phys Chem Lett Year: 2023 Document type: Article Affiliation country: Country of publication: