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  3. Chirality-induced spin selectivity - Wikipedia
Chirality-induced spin selectivity - Wikipedia
From Wikipedia, the free encyclopedia

Chirality-induced spin selectivity (CISS) refers to multiple phenomena where the chirality of a chemical compound influences the spin of transmitted or emitted electrons. This effect was discovered by Ron Naaman and co-workers.[1]

Experiments were able to demonstrate the effect in the form of polarization of electrons scattered from chiral molecules, spin-dependent transmission probabilities through layers of chiral molecules, spin-selectivity of electron-transport in a chiral medium and enantio-selectivity in chemical reactions induced by spin-polarized electrons.[2]

Theoretical models were able to qualitatively explain the effect using spin-orbit coupling (SOC). But quantitatively, the predicted effect was always orders of magnitude smaller than what was measured in experiments. Whilst mechanism underlying CISS is not completely understood, a hybrid method comprising a film of pure gold with chiral molecules on it has produced results on par with the magnetic method.[3]

References

  1. ^ Ray, K; Ananthavel, SP; Waldeck, DH; Naaman, R (February 1999). "Asymmetric scattering of polarized electrons by organized organic films of chiral molecules". Science. 283 (5403): 814–816. Bibcode:1999Sci...283..814R. doi:10.1126/science.283.5403.814. PMID 9933157.
  2. ^ Evers, Ferdinand; Aharony, Amnon; Bar-Gill, Nir; Entin-Wohlman, Ora; Hedegård, Per; Hod, Oded; Jelinek, Pavel; Kamieniarz, Grzegorz; Lemeshko, Mikhail; Michaeli, Karen; Mujica, Vladimiro; Naaman, Ron; Paltiel, Yossi; Refaely-Abramson, Sivan; Tal, Oren (April 2022). "Theory of Chirality Induced Spin Selectivity: Progress and Challenges". Advanced Materials. 34 (13) 2106629. arXiv:2108.09998. Bibcode:2022AdM....3406629E. doi:10.1002/adma.202106629. ISSN 0935-9648. PMID 35064943. S2CID 237266804.
  3. ^ "The Quantum Twist: Scientists Unlock a New Way to Control Electrons". January 31, 2025.


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