Anti-oxidative passivation and electrochemical activation of black phosphorus via covalent functionalization and its nonvolatile memory application
Anti-oxidative passivation and electrochemical activation of black phosphorus via covalent functionalization and its nonvolatile memory application
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DOI：
10.1039/d0tc01660h
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发表时间：
2020-06
影响因子：
6.4
通讯作者：
Weilin Chen;Shuang Gao;Zhuolin Xie;Ying Lu;Guodong Gong;Gang Liu;J. Shang;Chuanguang Yao
中科院分区：
文献类型：
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作者：
Weilin Chen;Shuang Gao;Zhuolin Xie;Ying Lu;Guodong Gong;Gang Liu;J. Shang;Chuanguang Yao
黑磷作为一种新型的层状半导体材料，可以弥补石墨烯和过渡金属二硫族化合物之间的能带和载流子迁移率差距，在光电子学和纳米电子学领域具有广阔的应用前景。然而，优异的半导体性能和在环境条件下容易氧化之间的矛盾很难调和。本文首次报道了通过引入三苯胺（TPA）的氧化还原活性部分来保护和调节BP。所制备的与TPA分子共价接枝的BP纳米片（BPNSs-TPA）具有优异的抗氧化性能和电化学活性。作为概念验证，BPNSs-TPA成功构建了基于氧化还原的非易失性电阻开关存储器，具有良好的工作稳定性和耐用性。同时，生物突触的增强和抑制特性在记忆细胞内得到了很好的模拟。这些结果为利用有机小分子对BP进行保护和功能化提供了有力途径，对BP在记忆和神经形态器件中的应用具有重要意义。
As a novel layered semiconductor that can bridge the energy band and carrier mobility gaps between graphene and transition metal dichalcogenides, black phosphorus (BP) has broad prospects in optoelectronics and nanoelectronics. Nevertheless, the contradiction between excellent semiconducting properties and easy oxidation under ambient conditions is difficult to reconcile. Herein, the first demonstration of the protection and regulation of BP by introducing redox-active moieties of triphenylamine (TPA) is reported. The prepared BP nanosheets grafted covalently with TPA molecules (BPNSs–TPA) exhibit excellent anti-oxidative capability and electrochemical activity. As a proof of concept, BPNSs–TPA are successfully used to construct a nonvolatile redox-based resistive switching memory, showing good working stability and durability. Meanwhile, potentiation and depression characteristics of a biological synapse are well emulated within the memory cell. These demonstrations could provide a powerful way to protect and functionalize BP through organic small molecules, which is of great significance for the application of BP in memory and neuromorphic devices.