Highly Selective Non‐Covalent On‐Chip Functionalization of Layered Materials. (15th January 2021)

• Record Type: Journal Article
• Authors: Tilmann, Rita; Weiß, Corinna; Cullen, Conor P.; Peters, Lisanne; Hartwig, Oliver; Höltgen, Laura; Stimpel‐Lindner, Tanja; Knirsch, Kathrin C.; McEvoy, Niall; Hirsch, Andreas; Duesberg, Georg S.
• Is Part Of: Advanced Electronic Materials. Volume 7:Number 7(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-01-15
• Subjects: 2D materials -- perylene bisimides -- self‐assembled monolayers -- surface functionalization -- transition metal dichalcogenides; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.202000564
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Non‐covalent functionalization of layered 2D materials is an essential tool to modify and fully harness their optical, electrical, and chemical properties. Herein, a facile method enabling the selective formation of self‐assembled monolayers (SAMs) of perylene bisimide (PBI) on transition metal dichalcogenides (TMDs), directly on the growth substrate (on‐chip), is presented. Laterally‐resolved infrared atomic force microscopy (AFM‐IR) and time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS) are applied as superior techniques to gain detailed information beyond traditional surface analysis techniques, such as Raman spectroscopy and AFM, on TMD/PBI structures. The highly selective functionalization conducted in organic solution on MoS2 and WSe2 opens up a pathway to controllable, versatile functionalization of layered materials, which is highly sought after for its potential in passivation, tuning of properties and applications in optics, electronics, and (bio‐) sensing. Abstract : Selective, non‐covalent, on‐chip functionalization of CVD‐grown monolayer MoS2 is realized by deposition of organic self‐assembled monolayers (SAMs) of perylene bisimides (PBI). The versatile functionalization is investigated with coupled infrared spectroscopy and atomic‐force microscopy (AFM‐IR) and time‐of‐flight secondary ion mass spectrometry (TOF‐SIMS), overcoming the limits of traditional optical techniques.