Surface-confined two-dimensional mass transport and crystal growth on monolayer materials

Yanyu Jia, Fang Yuan, Guangming Cheng, Yue Tang, Guo Yu, Tiancheng Song, Pengjie Wang, Ratnadwip Singha, Ayelet J. Uzan-Narovlansky, Michael Onyszczak, Kenji Watanabe, Takashi Taniguchi, Nan Yao, Leslie M. Schoop, Sanfeng Wu

Research output: Contribution to journalArticlepeer-review

Abstract

Conventional vapour deposition or epitaxial growth of two-dimensional (2D) materials and heterostructures is conducted in a large chamber in which masses transport from the source to the substrate. Here we report a chamber-free, on-chip approach for growing 2D crystalline structures directly in a nanoscale surface-confined 2D space. The method is based on the surprising discovery of the rapid, long-distance, non-Fickian transport of a uniform layer of atomically thin palladium on a monolayer crystal of tungsten ditelluride at temperatures well below the known melting points of all the materials involved. The nanoconfined growth realizes the controlled formation of a stable 2D crystalline material, Pd7WTe2, when the monolayer seed is either free-standing or fully encapsulated in a van der Waals stack. The approach is generalizable and compatible with nanodevice fabrication, promising to greatly expand the library of 2D materials and their functionalities. (Figure presented.)

Original languageEnglish (US)
Pages (from-to)386-393
Number of pages8
JournalNature Synthesis
Volume3
Issue number3
DOIs
StatePublished - Mar 2024

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Inorganic Chemistry
  • Organic Chemistry
  • Materials Chemistry

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