Sub-angstrom noninvasive imaging of atomic arrangement in 2D hybrid perovskites
In: Sci Adv, 2022
academicJournal
Zugriff:
Noninvasive imaging of the atomic arrangement in two-dimensional (2D) Ruddlesden-Popper hybrid perovskites (RPPs) is challenging because of the insulating nature and softness of the organic layers. Here, we demonstrate a sub-angstrom resolution imaging of both soft organic layers and inorganic framework in a prototypical 2D lead-halide RPP crystal via combined tip-functionalized scanning tunneling microscopy (STM) and noncontact atomic force microscopy (ncAFM) corroborated by theoretical simulations. STM measurements unveil the atomic reconstruction of the inorganic lead-halide lattice and overall twin-domain composition of the RPP crystal, while ncAFM measurements with a CO-tip enable nonperturbative visualization of the cooperative reordering of surface organic cations driven by their hydrogen bonding interactions with the inorganic lattice. Moreover, such a joint technique also allows for the atomic-scale imaging of the electrostatic potential variation across the twin-domain walls, revealing alternating quasi-1D electron and hole channels at neighboring twin boundaries, which may influence in-plane exciton transport and dissociation.
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Sub-angstrom noninvasive imaging of atomic arrangement in 2D hybrid perovskites
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Autor/in / Beteiligte Person: | Telychko, Mykola ; Edalatmanesh, Shayan ; Leng, Kai ; Abdelwahab, Ibrahim ; Guo, Na ; Zhang, Chun ; Mendieta-Moreno, Jesús I. ; Nachtigall, Matyas ; Li, Jing ; Loh, Kian Ping ; Jelínek, Pavel ; Lu, Jiong |
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Zeitschrift: | Sci Adv, 2022 |
Veröffentlichung: | American Association for the Advancement of Science, 2022 |
Medientyp: | academicJournal |
DOI: | 10.1126/sciadv.abj0395 |
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