Synthesis of two-dimensional van der waals superlattices, heterostructures, and alloys from conversion of sequentially layered sub-nanometer metal films

Author(s):Show less -

Motala, M. J. ; Zhang, X. ; Kumar, P. ; Oliveira, E. F. ; Benton, A. ; Miesle, P. ; Rao, R. ; Stevenson, P. R. ; Moore, D. ; Alfieri, A. ; Lynch, J. ; Austin, D. ; Post, S. ; Gao, G. ; Ma, S. ; Zhu, H. ; Wang, Z. ; Petrov, I. ; Stach, E. A. ; Kennedy, W. J. ; Vangala, S. ; Tour, J. M. ; Galvao, D. S. ; Jariwala, D. ; Muratore, C. ; Snure, M. ; Ajayan, P. M. ; Glavin, N. R.

• Document type: Journal article
• Source: MATERIALS TODAY NANO; v. 22, p. 9-pg., 2023-03-03.

Abstract

Manipulation of bulk material properties by controlling layer-by-layer chemistry and structure of nanomaterials has remained an overarching goal of nanoscience and nanoengineering. In the case of two-dimensional (2D) materials, heterostructures consisting of different compositions, stacking, and orientation can serve as a platform for designing bulk material properties; however, fundamental challenges associated with materials processes have limited material quality and impeded scalability. Most attempts to overcome this limitation have relied on slow layer-by-layer growth or meticulous transfer of grown single layers. Our work describes a method to directly convert easily fabricated sub-nanometer metal multilayer heterostructures on both sapphire and SiO2 substrates followed by con-version to 2D van der Waals superlattices, heterostructures, and alloys. These materials exhibit novel bulk properties compared to individual 2D layers themselves including reduced bandgap, enhanced light-matter coupling, and improved catalytic performance. The process versatility enables tunable orientation, layer structure, and chemistry in an exciting class of 2D nanomaterials and provides an opportunity to generate a wide range of artificially stacked multicompositional 2D structures with controlled morphologies. Published by Elsevier Ltd. (AU)

• FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
• Grantee: Munir Salomao Skaf
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 16/18499-0 - Investigation on the structural, mechanical and functional properties of carbon-based nanostructures
• Grantee: Eliezer Fernando de Oliveira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 19/07157-9 - DESIGNING NEW 3D STRUCTURES FROM ZEOLITE TEMPLATES FOR 3D PRINTING APPLICATIONS
• Grantee: Eliezer Fernando de Oliveira
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor