Local probe of the interlayer coupling strength of few-layers SnSe by contact-resonance atomic force microscopy
The interlayer bonding in two dimensional materials is particularly important because it is not only related to their physical and chemical stability but also affects their mechanical, thermal, electronic, optical, and other properties. To address this issue, we report the direct characterization of...
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Abstract | The interlayer bonding in two dimensional materials is particularly important because it is not only related to their physical and chemical stability but also affects their mechanical, thermal, electronic, optical, and other properties. To address this issue, we report the direct characterization of the interlayer bonding in 2D SnSe using contact-resonance atomic force microscopy in this study. Site specific CR spectroscopy and CR force spectroscopy measurements are performed on both SnSe and its supporting SiO2 substrate comparatively. Based on the cantilever and contact mechanic models, the contact stiffness and vertical Young's modulus are evaluated in comparison with SiO2 as a reference material. The interlayer bonding of SnSe is further analyzed in combination with the semi-analytical model and density functional theory calculations. The direct characterization of interlayer interactions using this nondestructive methodology of CR AFM would facilitate a better understanding of the physical and chemical properties of 2D layered materials, specifically for interlayer intercalation and vertical heterostructures. |
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AbstractList | The interlayer bonding in two dimensional materials is particularly important because it is not only related to their physical and chemical stability but also affects their mechanical, thermal, electronic, optical, and other properties. To address this issue, we report the direct characterization of the interlayer bonding in 2D SnSe using contact-resonance atomic force microscopy in this study. Site specific CR spectroscopy and CR force spectroscopy measurements are performed on both SnSe and its supporting SiO2 substrate comparatively. Based on the cantilever and contact mechanic models, the contact stiffness and vertical Young's modulus are evaluated in comparison with SiO2 as a reference material. The interlayer bonding of SnSe is further analyzed in combination with the semi-analytical model and density functional theory calculations. The direct characterization of interlayer interactions using this nondestructive methodology of CR AFM would facilitate a better understanding of the physical and chemical properties of 2D layered materials, specifically for interlayer intercalation and vertical heterostructures. |
Author | Pei, Tengfei Hong-Jun, Gao Xu, Rui Cheng, Zhihai Zheng, Zhiyue Pan, Yuhao Liu, Xiaojun Bao, Lihong Le, Lei Ji, Wei Xu, Kunqi Hussain, Sabir |
Author_xml | – sequence: 1 givenname: Zhiyue surname: Zheng fullname: Zheng, Zhiyue – sequence: 2 givenname: Yuhao surname: Pan fullname: Pan, Yuhao – sequence: 3 givenname: Tengfei surname: Pei fullname: Pei, Tengfei – sequence: 4 givenname: Rui surname: Xu fullname: Xu, Rui – sequence: 5 givenname: Kunqi surname: Xu fullname: Xu, Kunqi – sequence: 6 givenname: Lei surname: Le fullname: Le, Lei – sequence: 7 givenname: Sabir surname: Hussain fullname: Hussain, Sabir – sequence: 8 givenname: Xiaojun surname: Liu fullname: Liu, Xiaojun – sequence: 9 givenname: Lihong surname: Bao fullname: Bao, Lihong – sequence: 10 givenname: Gao surname: Hong-Jun fullname: Hong-Jun, Gao – sequence: 11 givenname: Wei surname: Ji fullname: Ji, Wei – sequence: 12 givenname: Zhihai surname: Cheng fullname: Cheng, Zhihai |
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SubjectTerms | Atomic force microscopy Bonding strength Chemical properties Density functional theory Heterostructures Interlayers Layered materials Mathematical models Microscopy Modulus of elasticity Nondestructive testing Optical properties Resonance Silicon dioxide Spectrum analysis Stiffness Substrates Two dimensional materials |
Title | Local probe of the interlayer coupling strength of few-layers SnSe by contact-resonance atomic force microscopy |
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