用化学剥离的1 TaS $_2$填料油墨印刷的电荷密度波器件
Charge-Density-Wave Devices Printed with the Ink of Chemically Exfoliated 1T-TaS$_2$ Fillers
摘要：
我们报告的准备含有来自准二维电荷密度波材料的填料的油墨，它们的应用喷墨印刷，和印刷薄膜形式的电子性能的评价。油墨通过CVT生长的1 T-TaS $_2$晶体的液相剥离制备，以产生具有nm级厚度和μ m级横向尺寸的填料。将剥离的1 T-TaS $_2$分散在异丙醇和乙二醇的混合物中，以允许微调它们用于喷墨印刷的热物理性质。印刷薄膜的随温度变化的电和电流波动测量表明，1 T-TaS $_2$的电荷密度波特性在处理后被保留。印刷的薄膜器件的功能性可以由单个剥离的1 T-TaS $_2$填料的几乎相称的电荷密度波相变来定义，而不是由它们之间的电子跳跃传输来定义。这些结果为印刷电子的发展提供了途径，通过引入准二维范德华量子材料实现了不同的功能。
英文摘要：
We report on the preparation of inks containing fillers derived from quasi-two-dimensional charge-density-wave materials, their application for inkjet printing, and the evaluation of their electronic properties in printed thin film form. The inks were prepared by liquid-phase exfoliation of CVT-grown 1T-TaS$_2$ crystals to produce fillers with nm-scale thickness and um-scale lateral dimensions. Exfoliated 1T-TaS$_2$ was dispersed in a mixture of isopropyl alcohol and ethylene glycol to allow fine-tuning of their thermo-physical properties for inkjet printing. The temperature-dependent electrical and current fluctuation measurements of printed thin films demonstrated that the charge-density-wave properties of 1T-TaS$_2$ are preserved after processing. The functionality of the printed thin-film devices can be defined by the nearly-commensurate to commensurate charge-density-wave phase transition of individual exfoliated 1T-TaS$_2$ fillers rather than by electron-hopping transport between them. These results provide pathways for the development of printed electronics with diverse functionality achieved by the incorporation of quasi-two-dimensional van der Waals quantum materials.
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