Engineering Titanium Dioxide/Titanocene-Polysulfide Interface for Flexible, Optical-Modulated, and Thermal-Tolerant Multilevel Memristor

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2025-02-07 DOI:10.1021/acs.nanolett.4c05786

Panke Zhou, Xi Lin, Yiqun Gao, Xiaoli Lin, Tao Zeng, Haohong Li, Xiong Chen, Huidong Zheng

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Abstract

Multifunctional memristors with a high memory density, low power consumption, flexibility, programmability, and environmental robustness are essential for next-generation memories. In this work, a titanocene-polysulfide complex (Cp₂TiS₅) with strong S···S interactions and hydrogen bonds was synthesized and integrated with TiO₂ to create a novel Cu/TiO₂/Cp₂TiS₅/Ag memristor. This device shows bipolar nonvolatile memory performance with a remarkable ON/OFF ratio (10^4.8), low switching voltages (V_SET, −0.16 V; V_RESET, +0.15 V), and low power consumption (2.7 × 10^–4 μW). It exhibits multilevel memory behavior, flexibility, optical modulation (V_SET decreases from −1.35 to −0.17 V with decreasing irradiation wavelength), and thermal tolerance (up to 200 °C). The electron-rich Cp₂TiS₅ layer protects the Ag-CFs, while TiO₂’s oxygen vacancies and unsaturated Ti atoms interact with sulfur from Cp₂TiS₅, lowering the Schottky barrier and facilitating charge transport. This work offers promising opportunities in flexible memristive devices for neuromorphic computing under extreme conditions.

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用于柔性、光学调制和耐热多级晶闸管的二氧化钛/二茂钛-多硫化物工程界面

具有高存储密度、低功耗、灵活性、可编程性和环境稳健性的多功能记忆电阻器对下一代存储器至关重要。在这项工作中，合成了一种具有强S··S相互作用和氢键的二茂钛-多硫化物配合物（Cp2TiS5），并与TiO2集成，形成了一种新型的Cu/TiO2/Cp2TiS5/Ag记忆电阻器。该器件具有双极非易失性存储性能，具有显着的ON/OFF比（104.8），低开关电压(VSET,−0.16 V；VRESET, +0.15 V)，功耗低（2.7 × 10-4 μW）。它具有多层记忆性能、灵活性、光调制（随着辐照波长的减小，VSET从- 1.35减小到- 0.17 V）和耐热性（高达200°C）。富含电子的Cp2TiS5层保护ag - cf，而TiO2的氧空位和不饱和Ti原子与Cp2TiS5中的硫相互作用，降低了肖特基势垒，促进了电荷传输。这项工作为极端条件下神经形态计算的柔性记忆装置提供了有希望的机会。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.