Premium
Spin‐selective electron transmission through self‐assembled monolayers of double‐stranded peptide nucleic acid
Author(s) -
Möllers Paul Valerian,
Ulku Selma,
Jayarathna Dilhara,
Tassinari Francesco,
Nürenberg Daniel,
Naaman Ron,
Achim Catalina,
Zacharias Helmut
Publication year - 2021
Publication title -
chirality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.43
H-Index - 77
eISSN - 1520-636X
pISSN - 0899-0042
DOI - 10.1002/chir.23290
Subject(s) - chemistry , peptide nucleic acid , monolayer , chirality (physics) , molecule , monomer , nucleic acid , peptide , spin polarization , crystallography , chemical physics , electron , organic chemistry , polymer , physics , quantum mechanics , biochemistry , chiral symmetry breaking , nambu–jona lasinio model , quark
Abstract Monolayers of chiral molecules can preferentially transmit electrons with a specific spin orientation, introducing chiral molecules as efficient spin filters. This phenomenon is established as chirality‐induced spin selectivity (CISS) and was demonstrated directly for the first time in self‐assembled monolayers (SAMs) of double‐stranded DNA (dsDNA) 1 . Here, we discuss SAMs of double‐stranded peptide nucleic acid (dsPNA) as a system which allows for systematic investigations of the influence of various molecular properties on CISS. In photoemission studies, SAMs of chiral, γ‐modified PNA show significant spin filtering of up to P = (24.4 ± 4.3)% spin polarization. The polarization values found in PNA lacking chiral monomers are considerably lower at about P = 12%. The results confirm that the preferred spin orientation is directly linked to the molecular handedness and indicate that the spin filtering capacity of the dsPNA helices might be enhanced by introduction of chiral centers in the constituting peptide monomers.