使用 MoS2 场效应晶体管对有机晶体相变进行电学监测,Nanoscale Advances

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使用 MoS2 场效应晶体管对有机晶体相变进行电学监测
Nanoscale Advances ( IF 4.6 ) Pub Date : 2023-02-14 , DOI: 10.1039/d2na00817c
Ilan Boulet ₁ , Simon Pascal ₁ , Frederic Bedu ₁ , Igor Ozerov ₁ , Alain Ranguis ₁ , Thomas Leoni ₁ , Conrad Becker ₁ , Laurence Masson ₁ , Aleksandar Matkovic ₂ , Christian Teichert ₂ , Olivier Siri ₁ , Claudio Attaccalite ₁ , Jean-Roch Huntzinger ₃ , Matthieu Paillet ₃ , Ahmed Zahab ₃ , Romain Parret ₁

Affiliation

由二维材料和有机分子制成的混合范德华异质结构利用了二维材料对所有界面修饰的高敏感性和有机化合物固有的多功能性。在这项研究中，我们对醌型两性离子/MoS ₂杂化系统感兴趣，在该系统中，有机晶体通过外延生长在 MoS ₂表面，并在热退火后重组为另一种多晶型物。通过在整个过程中原位记录的场效应晶体管测量、原子力显微镜和密度泛函理论计算，我们证明了醌型两性离子和 MoS _{2之间的电荷转移}强烈依赖于分子膜的构象。值得注意的是，晶体管的场效应迁移率和电流调制深度都保持不变，这为基于这种混合系统的高效器件开辟了广阔的前景。我们还表明，MoS ₂晶体管能够快速准确地检测有机层相变期间发生的结构修改。这项工作突出表明，MoS ₂晶体管是用于片上检测发生在纳米级的分子事件的卓越工具，这为研究其他动力系统铺平了道路。

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Electrical monitoring of organic crystal phase transition using MoS2 field effect transistor

Hybrid van der Waals heterostructures made of 2D materials and organic molecules exploit the high sensitivity of 2D materials to all interfacial modifications and the inherent versatility of the organic compounds. In this study, we are interested in the quinoidal zwitterion/MoS₂ hybrid system in which organic crystals are grown by epitaxy on the MoS₂ surface and reorganize in another polymorph after thermal annealing. By means of field-effect transistor measurements recorded in situ all along the process, atomic force microscopy and density functional theory calculations we demonstrate that the charge transfer between quinoidal zwitterions and MoS₂ strongly depends on the conformation of the molecular film. Remarkably, both the field effect mobility and the current modulation depth of the transistors remain unchanged which opens up promising prospects for efficient devices based on this hybrid system. We also show that MoS₂ transistors enable fast and accurate detection of structural modifications that occur during phases transitions of the organic layer. This work highlights that MoS₂ transistors are remarkable tools for on-chip detection of molecular events occurring at the nanoscale, which paves the way for the investigation of other dynamical systems.

更新日期：2023-02-14

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