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Title Two-dimensional boronate ester covalent organic framework thin films with large single crystalline domains for a neuromorphic memory device
Date 14.04.2020
Number 58424
Abstract Despite the recent progress in the synthesis of crystalline boronate ester covalent organic frameworks (BECOFs) in powder and thin–film through solvothermal method and on–solid–surface synthesis, respectively, their applications in electronics, remain less explored due to the challenges in thin–film processability and device integration associated with the control of film thickness, layer orientation, stability and crystallinity. Moreover, although the crystalline domain sizes of the powder samples can reach micrometer scale (up to ˜1.5 µm), the reported thin–film samples have so far rather small crystalline domains up to 100 nm. Here we demonstrate a general and efficient synthesis of crystalline two–dimensional (2D) BECOF films composed of porphyrin macrocycles and phenyl or naphthyl linkers (named as 2D BECOF–PP or 2D BECOF–PN) by employing a surfactant–monolayer–assisted interfacial synthesis (SMAIS) on the water surface. The achieved 2D BECOF–PP is featured as free–standing thin film with large single–crystalline domains up to ˜60 µm2 and tunable thickness from 6 to 16 nm. A hybrid memory device composed of 2D BECOF–PP film on silicon nanowire–based field–effect transistor is demonstrated as a bio–inspired system to mimic neuronal synapses, displaying a learning–erasing–forgetting memory process.
URL https://doi.org/10.1002/ANIE.201916595
Publisher Angewandte Chemie - International Edition
Identifier
Citation Angewandte Chemie - International Edition 2020 (2020) Early View
DOI https://doi.org/10.1002/ANIE.201916595
Authors Park, S. ; Liao, Z.Q. ; Ibarlucea, B. ; Qi, H. ; Lin, H.-H. ; Becker, D. ; Melidonie, J. ; Zhang, T. ; Sahabudeen, H. ; Baraban, L. ; Baek, C.K. ; Zheng, Z. ; Zschech, E. ; Fery, A. ; Heine, T. ; Kaiser, U. ; Cuniberti, G. ; Dong, R. ; Feng, X.
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