Chemistry:Chirality-induced spin selectivity
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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]
In 2025, Huang et al. reported voltage-controlled interfacial chirality in an otherwise achiral molybdenum disulfide surface by using an electric double-layer transistor with enantiopure ionic liquids; the induced state was detected through CISS and the electrical magnetochiral effect.[4]
References
- ↑ Ray, K; Ananthavel, SP; Waldeck, DH; Naaman, R (February 1999). "Asymmetric scattering of polarized electrons by organized organic films of chiral molecules" (in en). Science 283 (5403): 814–816. doi:10.1126/science.283.5403.814. PMID 9933157. Bibcode: 1999Sci...283..814R.
- ↑ Evers, Ferdinand; Aharony, Amnon; Bar-Gill, Nir; Entin-Wohlman, Ora; Hedegård, Per; Hod, Oded; Jelinek, Pavel; Kamieniarz, Grzegorz et al. (April 2022). "Theory of Chirality Induced Spin Selectivity: Progress and Challenges" (in en). Advanced Materials 34 (13). doi:10.1002/adma.202106629. ISSN 0935-9648. PMID 35064943. Bibcode: 2022AdM....3406629E.
- ↑ "The Quantum Twist: Scientists Unlock a New Way to Control Electrons". January 31, 2025. https://scitechdaily.com/the-quantum-twist-scientists-unlock-a-new-way-to-control-electrons/.
- ↑ Huang, Po-Jung; Ando, Yoshio; Tanaka, Miuko; Nishio, Yukito; Ideue, Toshiya; Taniguchi, Kouji (21 November 2025). "Proximity-induced chirality at the achiral conductive interface by electrical control of enantiopure ion adsorption". Science Advances 11 (47). doi:10.1126/sciadv.adx2281.
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