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Title: Chiral Recognition: A Spin-Driven Process in Chiral Oligothiophene. A Chiral-Induced Spin Selectivity (CISS) Effect Manifestation

Journal Article · · Advanced Functional Materials
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [9]
  1. University of Modena and Reggio Emilia, Modena (Italy)
  2. Univ. of Bologna (Italy)
  3. Univ. di Milano (Italy)
  4. University of Insubria, Como (Italy)
  5. University of Firenze, Sesto Fiorentino (Italy); National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze (Italy)
  6. University of Modena and Reggio Emilia, Modena (Italy); Italian National Research Council, Basovizza Trieste (Italy). Istituto Officina dei Materiali (IOM)
  7. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  8. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT); Univ. of Chicago, IL (United States)
  9. University of Modena and Reggio Emilia, Modena (Italy); National Interuniversity Consortium of Materials Science and Technology (INSTM), Firenze (Italy)

In this paper it is experimentally demonstrated that the electron-spin/molecular-handedness interaction plays a fundamental role in the chiral recognition process. This conclusion is inferred comparing current versus potential (I-V) curves recorded using chiral electrode surfaces, which are obtained via chemisorption of an enantiopure thiophene derivative: 3,3'-bibenzothiophene core functionalized with 2,2'-bithiophene wings (BT2T4). The chiral recognition capability of these chiral-electrodes is probed via cyclic voltammetry measurements, where, Ag nanoparticles (AgNPs) capped with enantiopure (BT2T4) (BT2T4)@AgNP) are used as the chiral redox probe. Then, the interface handedness is explored by recording spin-polarized (I-V) curves in spin-dependent electrochemistry (SDE) and magnetic-conductive atomic force microscopy (mc-AFM) experiments. The quality of the interfaces is thoroughly cross-checked using X-ray photoemission spectroscopy, Raman, electrodesorption measurements, which further substantiate the metal(electrode)-sulfur(thiophene) central role in the chemisorption process. Spin-polarization values of about 15% and 30% are obtained in the case of SDE and mc-AFM experiments, respectively.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
2204210
Report Number(s):
LA-UR--23-27056
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 2 Vol. 34; ISSN 1616-301X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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