Synthesis and Characterization of Ultrathin FeTe2 Nanocrystals

Dana Capitano; Zhixiang Hu; Yu Liu; Xiao Tong; Dmytro Nykypanchuk; Donald DiMarzio; Cedomir Petrovic

doi:10.1021/acsomega.0c04872

Synthesis and Characterization of Ultrathin FeTe₂ Nanocrystals

ACS Omega. 2021 Apr 12;6(16):10537-10546. doi: 10.1021/acsomega.0c04872. eCollection 2021 Apr 27.

Authors

Dana Capitano^{1

2}, Zhixiang Hu^{1

2}, Yu Liu¹, Xiao Tong³, Dmytro Nykypanchuk³, Donald DiMarzio⁴, Cedomir Petrovic^{1

2}

Affiliations

¹ Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, United States.
² Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11790, United States.
³ Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States.
⁴ Northrop Grumman Corporation, One Space Park, Redondo Beach, California 90278, United States.

Abstract

Ultrathin crystals including monolayers have been reported for various transition-metal dichalcogenides (TMDCs) with van der Waals bonds in the crystal structure. Herein, we report a detailed synthesis procedure and characterization of ultrathin iron ditelluride crystals. This material crystallizes in an orthorhombic marcasite Pnnm crystal structure whose bonding is dominantly covalent and without loosely connected van der Waals (vdW) bonds, making monolayer FeTe₂ synthesis less straightforward than other TMDC monolayer syntheses. The chemical vapor deposition synthesis process described is simple, effective, and results in a range of crystal thicknesses from approximately 400 nm down to the FeTe₂ monolayer.