Download file (2.63MB)
Download as zip (2.3MB)

コレクション

引用

説明:

Solid-liquid phase transitions are fundamental physical processes for materials, but atomically-resolved microscopy has yet to capture the full dynamics of such a transition. We have developed a new technique for controlling melting and freezing of 2D molecular layers on a graphene field-effect transistor (FET) that allows us to image phase transition dynamics via atomically-resolved scanning tunneling microscopy. This is achieved by applying electric fields to an F4TCNQ-decorated graphene FET that induce reversible transitions between a molecular solid and an ionic liquid phase in 2D. Nonequilibrium melting dynamics are visualized by rapidly heating the graphene surface with electrical current and imaging the resulting evolution toward new equilibrium states. An analytical model has been developed that explains the observed equilibrium mixed-state phases based on direct spectroscopic measurement of solid and liquid molecular energy levels. Observed non-equilibrium melting dynamics are consistent with Monte Carlo simulations.

権利情報:

• In Copyright
  

キーワード: Solid-liquid phase transitions, scanning tunneling microscopy, graphene field-effect transistor

刊行年月日: 2023-07-13

出版者: Wiley

掲載誌:

• Advanced Materials (ISSN: 15214095) vol. 35 issue. 39 2300542

研究助成金:

• Thomas Young Centre TYC‐101
• Engineering and Physical Sciences Research Council EP/S025324/1

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1002/adma.202300542

関連資料:

その他の識別子:

連絡先:

更新時刻: 2025-02-23 22:49:36 +0900

MDRでの公開時刻: 2025-02-23 22:49:39 +0900