DataVXAdvanced Functional MaterialsPaper
journal article·2024-01Open access

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

Andrea Stefani, Tommaso Salzillo, Patrizia Romana Mussini, Tiziana Benincori, Massimo Innocenti, Luca Pasquali, Andrew C. Jones, Suryakant Mishra, Claudio Fontanesi

Advanced Functional Materials· Volume 34· Issue 2
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Source abstract

Abstract

Abstract 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.
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Research context

Nanomaterials

OpenAlex topics: Molecular Junctions and Nanostructures · Electrochemical Analysis and Applications · Advanced biosensing and bioanalysis techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics Informatics and Mathematics ‘FIM’ University of Modena and Reggio Emilia Via Giuseppe Campi, 213 Modena 41125 Italy

Department of Engineering ‘Enzo Ferrari’ DIEF University of Modena and Reggio Emilia Via Vivarelli 10 Modena 41125 Italy

Department of Industrial Chemistry “Toso Montanari” University of Bologna Viale del Risorgimento, 4 Bologna 40136 Italy

Department of Chemistry University of Milano Via Golgi 19 Milano 20133 Italy

Department of Science and Technology DISAT University of Insubria Via Valleggio 11 Como 22100 Italy

Department of Chemistry “Ugo Schiff” Univ. of Firenze via della Lastruccia 3 Sesto Fiorentino 50019 Italy

National Interuniversity Consortium of Materials Science and Technology (INSTM) Via G. Giusti 9 Firenze FI 50121 Italy

IOM‐CNR Strada Statale 14, Km. 163.5 in AREA Science Park Basovizza Trieste 34149 Italy

Department of Physics University of Johannesburg P.O. Box 524 Auckland Park 2006 South Africa

Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos NM 87545 USA

Pritzker School of Molecular Engineering at University of Chicago 5640 S Ellis Ave Chicago Illinois 60637 USA

Funding

Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali

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