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Two-Dimensional Boronate Ester Covalent Organic Framework Thin Films with Large Single Crystalline Domains for a Neuromorphic Memory Device
Authors
Chang-Ki Baek
Larysa Baraban
+17 more
Daniel Becker
Gianaurelio Cuniberti
Renhao Dong
Xinliang Feng
Andreas Fery
Thomas Heine
Bergoi Ibarlucea
Ute Kaiser
Zhongquan Liao
Hung-Hsuan Lin
Jason Melidonie
SangWook Park
Haoyuan Qi
Hafeesudeen Sahabudeen
Tao Zhang
Zhikun Zheng
Ehrenfried Zschech
Publication date
1 January 2020
Publisher
Weinheim : Wiley-VCH
Doi
Cite
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. © 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA
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Last time updated on 23/07/2022