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O: Fachverband Oberflächenphysik
O 79: 2D Materials V: Growth, Structure and Substrate Interaction
O 79.1: Talk
Thursday, March 21, 2024, 10:30–10:45, MA 005
Exfoliation of large-area monolayers using template stripped gold — •Laxman Nagireddy1,2,3, Neil R. Wilson1, Maria Christine Richter2,3, Karol Hricovini2,3, Matthew D. Watson4, Cephise Cacho4, Nicholas D. M. Hine1, and Samuel J. Magorrian1 — 1University of Warwick, Coventry, UK — 2CY Cergy Paris Université, CEA, LIDYL,Gif-sur-Yvette, France — 3Université Paris-Saclay, CEA, LIDYL, Gif-sur-Yvette, France — 4Diamond Light Source, Harwell Science and Innovation Campus, Didcot, UK
The diverse family of two-dimensional materials exhibits a myriad of applications owing to their unique electronic, optical, and chemical properties. While mechanical exfoliation has been a pivotal method for obtaining high-quality two-dimensional materials, existing techniques are constrained by limitations in yield, lateral size, and contamination. Although numerous studies have explored the use of gold for exfoliating large-area monolayers[1], these approaches often prove unsuitable for surface-sensitive techniques such as photoemission spectroscopy.
In this study, we present a novel methodology for preparing an atomically flat gold surface using a template stripped gold method [2], subsequently employed for the exfoliation of various two-dimensional materials. Successful exfoliation was achieved for WSe2, CrSBr, and FePS3. The obtained monolayers were characterized using angle-resolved photoemission spectroscopy (ARPES).
References:
[1] M Velicky, et al., ACSnano 12.10 10463-10472 (2018).
[2] N Vogel, et al., Nanoscale 4.13 3820-3832 (2012).
Keywords: WSe2; ARPES; gold; exfoliation; monolayer