Chemistry of 2D materials: Intercalation and surface functionalization

Informazioni relative al progetto

CHEM2D

ID dell’accordo di sovvenzione: 794126

DOI

10.3030/794126

Progetto concluso il 29 Febbraio 2020

Data della firma CE 23 Marzo 2018

Data di avvio 1 Giugno 2019

Data di completamento 14 Novembre 2021

Finanziato da

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Costo totale

€ 158 121,60

Contributo UE

€ 158 121,60

Coordinato da

AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS
Spain

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

Periodo di rendicontazione: 2019-06-01 al 2021-05-31

Sintesi del contesto e degli obiettivi generali del progetto

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.

Lavoro eseguito dall’inizio del progetto fino alla fine del periodo coperto dalla relazione e principali risultati finora ottenuti

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.

Progressi oltre lo stato dell’arte e potenziale impatto previsto (incluso l’impatto socioeconomico e le implicazioni sociali più ampie del progetto fino ad ora)

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