Resolving Atomic-Scale Defects in Conjugated Polymers On-Surfaces.

Autor: Mallada B; Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 78371, Olomouc, Czech Republic.; Department of Physical Chemistry, Faculty of Science, Palacký University, 78371, Olomouc, Czech Republic.; Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic., Chen Q; Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic., Chutora T; Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 78371, Olomouc, Czech Republic.; Current address: Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2J1, Canada., Sánchez-Grande A; IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid, Spain., Cirera B; IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid, Spain., Santos J; IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid, Spain., Martín N; IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid, Spain., Ecija D; IMDEA Nanociencia, Ciudad Universitaria de Cantoblanco, Madrid, Spain., Jelínek P; Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 78371, Olomouc, Czech Republic.; Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic., de la Torre B; Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, 78371, Olomouc, Czech Republic.; Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic.
Jazyk: angličtina
Zdroj: Chemistry (Weinheim an der Bergstrasse, Germany) [Chemistry] 2022 Aug 26; Vol. 28 (48), pp. e202200944. Date of Electronic Publication: 2022 Jul 06.
DOI: 10.1002/chem.202200944
Abstrakt: Atomic scale defects significantly affect the mechanical, electronic, and optical properties of π-conjugated polymers. Here, isolated atomic-scale defects are deliberately introduced into a prototypical anthracene-ethynylene π-conjugated polymer, and its local density of states is carefully examined on the atomic scale to show how individual defects modify the inherent electronic and magnetic properties of this one-dimensional systems. Scanning tunneling and atomic force microscopy experiments, supplemented with density functional theory calculations, reveal the existence of a sharp electronic resonance at the Fermi energy around certain defects, which is associated with the formation of a local magnetic moment accompanied by substantial mitigation of the mobility of charge carriers. While defects in traditionally synthesized polymers lead to arbitrary conformations, the presented results clearly reflect the preferential formation of low dimensional defects at specific polymer sites, which may introduce the possibility of engineering macroscopic defects in surface-synthesized conjugated polymers.
(© 2022 Wiley-VCH GmbH.)
Databáze: MEDLINE
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