Inert liquid exfoliation and Langmuir-type thin film deposition of semimetallic metal diborides

• Verfasst von: Synnatschke, Kevin [VerfasserIn]
• Verfasst von: Müller, Alina [VerfasserIn]
• Verfasst von: Gabbett, Cian [VerfasserIn]
• Verfasst von: Mohn, Michael Johannes [VerfasserIn]
• Verfasst von: Kelly, Adam G. [VerfasserIn]
• Verfasst von: Mosina, Kseniia [VerfasserIn]
• Verfasst von: Wu, Bing [VerfasserIn]
• Verfasst von: Caffrey, Eoin [VerfasserIn]
• Verfasst von: Cassidy, Oran [VerfasserIn]
• Verfasst von: Backes, Claudia [VerfasserIn]
• Verfasst von: Sofer, Zdenek [VerfasserIn]
• Verfasst von: Kaiser, Ute [VerfasserIn]
• Verfasst von: Coleman, Jonathan N. [VerfasserIn]
• Titel: Inert liquid exfoliation and Langmuir-type thin film deposition of semimetallic metal diborides
• Verf.angabe: Kevin Synnatschke, Alina Müller, Cian Gabbett, Michael Johannes Mohn, Adam G. Kelly, Kseniia Mosina, Bing Wu, Eoin Caffrey, Oran Cassidy, Claudia Backes, Zdenek Sofer, Ute Kaiser and Jonathan N. Coleman
• E-Jahr: 2024
• Jahr: October 9, 2024
• Umfang: 13 S.
• Illustrationen: Illustrationen
• Fussnoten: Gesehen am 05.05.2025
• Titel Quelle: Enthalten in: American Chemical SocietyACS nano
• Ort Quelle: Washington, DC : Soc., 2007
• Jahr Quelle: 2024
• Band/Heft Quelle: 18(2024), 42, Seite 28596-28608
• ISSN Quelle: 1936-086X
• DOI: doi:10.1021/acsnano.4c04626
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1924674068

Abstract

Graphite is one of only a few layered materials that can be exfoliated into nanosheets with semimetallic properties, which limits the applications of nanosheet-based electrodes to material combinations compatible with the work function of graphene. It is therefore important to identify additional metallic or semimetallic two-dimensional (2D) nanomaterials that can be processed in solution for scalable fabrication of printed electronic devices. Metal diborides represent a family of layered non-van der Waals crystals with semimetallic properties for all nanosheet thicknesses. While previous reports show that the exfoliated nanomaterial is prone to oxidation, we demonstrate a readily accessible inert exfoliation process to produce quasi-2D nanoplatelets with intrinsic material properties. For this purpose, we demonstrate the exfoliation of three representative metal diborides (MgB2, CrB2, and ZrB2) under inert conditions. Nanomaterial is characterized using a combination of transmission electron microscopy, scanning electron microscopy, atomic force microscopy, IR, and UV-vis measurements, with only minimal oxidation indicated postprocessing. By depositing the pristine metal diboride nanoplatelets as thin films using a Langmuir-type deposition technique, the ohmic behavior of the networks is validated. Furthermore, the material decomposition is studied by using a combination of electrical and optical measurements after controlled exposure to ambient conditions. Finally, we report an efficient, low-cost approach for sample encapsulation to protect the nanomaterials from oxidation. This is used to demonstrate low-gauge factor strain sensors, confirming metal diboride nanosheets as a suitable alternative to graphene for electrode materials in printed electronics.