Strontium titanate (SrTiO₃) ultra-thin-nanosheets with an average thickness of 3.1 ± 0.2 nm have been synthesized via a solvothermal reaction route with ethylene glycol as the reaction medium solvent. The as-prepared SrTiO₃ nanosheet and polyvinylpyrrolidone (PVP) (SrTiO₃–PVP) composites were formed into large-scale high-integrity thin films on polyethylene terephthalate (PET) by using a spin-coating method. A flexible memory device with the configuration of Ag/SrTiO₃–PVP/Pt/PET was fabricated and it showed a promising write-once read-many times memory effect with a high ON/OFF current ratio of more than 1.0 × 10³, an ultralow switching voltage (0.17 V), good stability, good repeatability and flexibility. SrTiO₃ nanosheets acting as trapping centers in the device play a significant role in the resistive switching mechanisms. We hope that the benefits of ultralow switching voltage and flexible characteristics will make this material promising for next generation nonvolatile functional memory applications.

中文翻译：

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基于SrTiO ₃纳米片和聚乙烯吡咯烷酮复合材料的柔性非易失性电阻存储器件

以乙二醇为反应介质溶剂，通过溶剂热反应合成了平均厚度为3.1±0.2 nm的钛酸锶（SrTiO ₃）超薄纳米片。制备的SrTiO ₃纳米片和聚乙烯吡咯烷酮（PVP）（SrTiO ₃ -PVP）复合材料通过旋涂法在聚对苯二甲酸乙二醇酯（PET）上形成大规模的高完整性薄膜。制造了一种具有Ag / SrTiO ₃ –PVP / Pt / PET构造的柔性存储器件，它显示了有希望的一次写入多次读取的存储效果，且开/关电流比大于1.0×10 ³，超低开关电压（0.17 V），良好的稳定性，良好的可重复性和灵活性。SrTiO ₃纳米片在器件中充当俘获中心，在电阻转换机制中起着重要作用。我们希望超低的开关电压和灵活的特性所带来的好处将使这种材料在下一代非易失性功能存储应用中大有前途。