Research paperExperimental CharacterizationComputational DFTStrain-Induced Decoupling Drives Gold-Assisted Exfoliation of Large-Area Monolayer 2D CrystalsJakob Ziewer, Abyay Ghosh, Michaela Hanušová, Luka Pirker et al.2024·10.1002/adma.202419184·arXiv:2412.05898AbstractGold-assisted exfoliation (GAE) produces centimeter-scale single-crystal monolayers of 2D materials, but its mechanism is poorly understood. Using MoS₂ on Au as a model system, this study employs ultra-low-frequency Raman spectroscopy and DFT simulations to show that biaxial strain in the adhered bottom layer weakens the first MoS₂-MoS₂ interface, driving preferential cleavage into large-area monolayers. The decoupling strength depends on crystal thickness and becomes nearly complete for crystals thicker than five layers.Read more
Large-area MoS₂ monolayer exfoliated and adhered on a 10 nm Au film on SiO₂/Si; used for Raman strain/decoupling analysis.4 characterizations9 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on SiO₂(100 nm)/Si reference substrate, comprising flakes of various thicknesses.3 characterizations2 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on Au substrates of varying thicknesses (2, 5, and 10 nm), including monolayer and few-layer regions.3 characterizations1 property3 figuresExperimentalMoS₂Studied MaterialExpand
Research paperExperimental CharacterizationComputational DFTStrain-Induced Decoupling Drives Gold-Assisted Exfoliation of Large-Area Monolayer 2D CrystalsJakob Ziewer, Abyay Ghosh, Michaela Hanušová, Luka Pirker et al.2024·10.1002/adma.202419184·arXiv:2412.05898AbstractGold-assisted exfoliation (GAE) produces centimeter-scale single-crystal monolayers of 2D materials, but its mechanism is poorly understood. Using MoS₂ on Au as a model system, this study employs ultra-low-frequency Raman spectroscopy and DFT simulations to show that biaxial strain in the adhered bottom layer weakens the first MoS₂-MoS₂ interface, driving preferential cleavage into large-area monolayers. The decoupling strength depends on crystal thickness and becomes nearly complete for crystals thicker than five layers.Read more
Large-area MoS₂ monolayer exfoliated and adhered on a 10 nm Au film on SiO₂/Si; used for Raman strain/decoupling analysis.4 characterizations9 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on SiO₂(100 nm)/Si reference substrate, comprising flakes of various thicknesses.3 characterizations2 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on Au substrates of varying thicknesses (2, 5, and 10 nm), including monolayer and few-layer regions.3 characterizations1 property3 figuresExperimentalMoS₂Studied MaterialExpand
Research paperExperimental CharacterizationComputational DFTStrain-Induced Decoupling Drives Gold-Assisted Exfoliation of Large-Area Monolayer 2D CrystalsJakob Ziewer, Abyay Ghosh, Michaela Hanušová, Luka Pirker et al.2024·10.1002/adma.202419184·arXiv:2412.05898AbstractGold-assisted exfoliation (GAE) produces centimeter-scale single-crystal monolayers of 2D materials, but its mechanism is poorly understood. Using MoS₂ on Au as a model system, this study employs ultra-low-frequency Raman spectroscopy and DFT simulations to show that biaxial strain in the adhered bottom layer weakens the first MoS₂-MoS₂ interface, driving preferential cleavage into large-area monolayers. The decoupling strength depends on crystal thickness and becomes nearly complete for crystals thicker than five layers.Read more
Large-area MoS₂ monolayer exfoliated and adhered on a 10 nm Au film on SiO₂/Si; used for Raman strain/decoupling analysis.4 characterizations9 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on SiO₂(100 nm)/Si reference substrate, comprising flakes of various thicknesses.3 characterizations2 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on Au substrates of varying thicknesses (2, 5, and 10 nm), including monolayer and few-layer regions.3 characterizations1 property3 figuresExperimentalMoS₂Studied MaterialExpand
Research paperExperimental CharacterizationComputational DFTStrain-Induced Decoupling Drives Gold-Assisted Exfoliation of Large-Area Monolayer 2D CrystalsJakob Ziewer, Abyay Ghosh, Michaela Hanušová, Luka Pirker et al.2024·10.1002/adma.202419184·arXiv:2412.05898AbstractGold-assisted exfoliation (GAE) produces centimeter-scale single-crystal monolayers of 2D materials, but its mechanism is poorly understood. Using MoS₂ on Au as a model system, this study employs ultra-low-frequency Raman spectroscopy and DFT simulations to show that biaxial strain in the adhered bottom layer weakens the first MoS₂-MoS₂ interface, driving preferential cleavage into large-area monolayers. The decoupling strength depends on crystal thickness and becomes nearly complete for crystals thicker than five layers.Read more
Large-area MoS₂ monolayer exfoliated and adhered on a 10 nm Au film on SiO₂/Si; used for Raman strain/decoupling analysis.4 characterizations9 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on SiO₂(100 nm)/Si reference substrate, comprising flakes of various thicknesses.3 characterizations2 properties3 figuresExperimentalMoS₂Studied MaterialExpand
MoS₂ exfoliated on Au substrates of varying thicknesses (2, 5, and 10 nm), including monolayer and few-layer regions.3 characterizations1 property3 figuresExperimentalMoS₂Studied MaterialExpand