1. Towards efficient strain engineering of 2D materials: A four-points bending approach for compressive strain
- Author
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Universidad de Sevilla. Departamento de Física Aplicada I, Universidad de Sevilla. FQM196: Nanotecnología en Superficies y Plasma, European Union’s Horizon 2020 research and innovation program Nº 755655, European Union’s Horizon 2020 research and innovation program ERC-StG 2017 project 2D-TOPSENSE, Ministry of Science and Innovation (Spain) through the project PID2020-115566RB-I00, EU FLAG-ERA project To2Dox under the program PCI2019-111893-2, Spanish Ministry of Science and Innovation AEI/10.13039/501100011033 Nº PID2019-110430GB-C21, EU ERDF (FEDER Operational Program (2014–2020), A way of making Europe) and the Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía P18-RT-3480, EU ERDF (FEDER Operational Program (2014–2020), A way of making Europe) and the Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía US-1381057, Li, Hao, Carrascoso Plana, Félix, Borrás Martos, Ana, Moreno Martínez, Gloria P., Aparicio Rebollo, Francisco Javier, Barranco Quero, Ángel, Castellanos Gómez, Andrés, Universidad de Sevilla. Departamento de Física Aplicada I, Universidad de Sevilla. FQM196: Nanotecnología en Superficies y Plasma, European Union’s Horizon 2020 research and innovation program Nº 755655, European Union’s Horizon 2020 research and innovation program ERC-StG 2017 project 2D-TOPSENSE, Ministry of Science and Innovation (Spain) through the project PID2020-115566RB-I00, EU FLAG-ERA project To2Dox under the program PCI2019-111893-2, Spanish Ministry of Science and Innovation AEI/10.13039/501100011033 Nº PID2019-110430GB-C21, EU ERDF (FEDER Operational Program (2014–2020), A way of making Europe) and the Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía P18-RT-3480, EU ERDF (FEDER Operational Program (2014–2020), A way of making Europe) and the Consejería de Economía, Conocimiento, Empresas y Universidad de la Junta de Andalucía US-1381057, Li, Hao, Carrascoso Plana, Félix, Borrás Martos, Ana, Moreno Martínez, Gloria P., Aparicio Rebollo, Francisco Javier, Barranco Quero, Ángel, and Castellanos Gómez, Andrés
- Abstract
Strain engineering, as a powerful strategy to tune the optical and electrical properties of two-dimensional (2D) materials by deforming their crystal lattice, has attracted significant interest in recent years. 2D materials can sustain ultra-high strains, even up to 10%, due to the lack of dangling bonds on their surface, making them ideal brittle solids. This remarkable mechanical resilience, together with a strong strain-tunable band structure, endows 2D materials with a broad optical and electrical response upon strain. However, strain engineering based on 2D materials is restricted by their nanoscale and strain quantification troubles. In this study, we have modified a homebuilt three-points bending apparatus to transform it into a four-points bending apparatus that allows for the application of both compressive and tensile strains on 2D materials. This approach allows for the efficient and reproducible construction of a strain system and minimizes the buckling effect caused by the van der Waals interaction by adamantane encapsulation strategy. Our results demonstrate the feasibility of introducing compressive strain on 2D materials and the potential for tuning their optical and physical properties through this approach.
- Published
- 2024