Chemistry of 2D materials: Intercalation and surface functionalization

Información del proyecto

CHEM2D

Identificador del acuerdo de subvención: 794126

DOI

10.3030/794126

Proyecto finalizado el 29 Febrero 2020

Fecha de la firma de la CE 23 Marzo 2018

Fecha de inicio 1 Junio 2019

Fecha de finalización 14 Noviembre 2021

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 158 121,60

Aportación de la UE

€ 158 121,60

Coordinado por

AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS
Spain

Periodic Reporting for period 1 - CHEM2D (Chemistry of 2D materials: Intercalation and surface functionalization)

Período documentado: 2019-06-01 hasta 2021-05-31

Resumen del contexto y de los objetivos generales del proyecto

The physical properties of 2D materials are extremely sensitive to the number of layers and the interlayer distance, governed by weak van der Waals interactions. Consequently, the fine-tuning of these interactions permit to control the properties of the material.

The main goal of this project was to synthesize new 2D materials (based on transition-metal chalcogenides) with tailored transport and optoelectronic properties, by controlling interlayer interactions (via intercalation) and the surfaces of the crystals (via functionalization). Intercalation of guest species, such as alkali metals, act as spacers and can provide a very large doping level by conducting charge carriers into the adjacent conducting layer. Furthermore, the increase in layer separation produces a weaker interaction between layers, resulting in each layer behaving as an almost isolated single layer.

By using nanofabrication techniques, synthesized 2D materials can be integrated into electronic devices.

Trabajo realizado desde el comienzo del proyecto hasta el final del período abarcado por el informe y los principales resultados hasta la fecha

The technical report contains the main results of the project, which can be summarized in the following points:

- Exfoliation of MoS2 crystal was successfully performed by microwave-hydrothermal procedure.
- Two alternative strategies of intercalation were explored throughout this work: (1) Wet-chemistry routes: lithium was intercalated in metal chalcogenides by using n-butyl lithium in hexane or lithium metal/ naphthalene in THF.(2) Electrochemistry approach for the preparation of intercalated 2D-materials. Lithium or sodium metal anode intercalates into the 2D material cathode through an ionically conducting liquid/solid electrolyte through an external bias.

Avances que van más allá del estado de la técnica e impacto potencial esperado (incluida la repercusión socioeconómica y las implicaciones sociales más amplias del proyecto hasta la fecha)

Electrochemical approach can be efficiently used for the preparation of intercalated 2D-materials. The easily control of the doping level by this method allows new possibilities for bespoke 2D material design.
The synthesized materials will be integrated into electronic devices such as photodetectors or solar cells.

Schematic of tuning 2D materials by (a) intercalation, (b) functionalization