Print Email Facebook Twitter Highly anisotropic mechanical and optical properties of 2D layered As2S3 membranes Title Highly anisotropic mechanical and optical properties of 2D layered As2S3 membranes Author Siskins, M. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Lee, M. (TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Alijani, F. (TU Delft Dynamics of Micro and Nano Systems) Van Blankenstein, Mark R. (Kavli institute of nanoscience Delft; Student TU Delft) Davidovikj, D. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) van der Zant, H.S.J. (TU Delft QN/van der Zant Lab; Kavli institute of nanoscience Delft) Steeneken, P.G. (TU Delft Dynamics of Micro and Nano Systems; TU Delft QN/Steeneken Lab; Kavli institute of nanoscience Delft) Date 2019 Abstract Two-dimensional (2D) materials with strong in-plane anisotropy are of interest for enabling orientation-dependent, frequency-tunable, optomechanical devices. However, black phosphorus (bP), the 2D material with the largest anisotropy to date, is unstable as it degrades in air. In this work we show that As2S3 is an interesting alternative, with a similar anisotropy to bP, while at the same time having a much higher chemical stability. We probe the mechanical and optical anisotropy in As2S3 by three distinct angular-resolved experimental methods: Raman spectroscopy, atomic force microscopy (AFM), and resonance frequency analysis. Using a dedicated angle-resolved AFM force-deflection method, an in-plane anisotropy factor of EaEc=1.7 is found in the Young's modulus of As2S3 with Ea-axis = 79.1 ± 10.1 GPa and Ec-axis = 47.2 ± 7.9 GPa. The high mechanical anisotropy is also shown to cause up to 65% difference in the resonance frequency, depending on crystal orientation and aspect ratio of membranes. Subject 2D materialsarsenic trisulfide (AsS)mechanical anisotropymultimode resonancesnanoelectromechanical systems (NEMS)Raman spectroscopy To reference this document use: http://resolver.tudelft.nl/uuid:e7973912-63ad-4a38-af81-a5b135336573 DOI https://doi.org/10.1021/acsnano.9b06161 ISSN 1936-0851 Source ACS Nano (online), 13 (9), 10845-10851 Part of collection Institutional Repository Document type journal article Rights © 2019 M. Siskins, M. Lee, F. Alijani, Mark R. Van Blankenstein, D. Davidovikj, H.S.J. van der Zant, P.G. Steeneken Files PDF acsnano.9b06161.pdf 3.33 MB Close viewer /islandora/object/uuid:e7973912-63ad-4a38-af81-a5b135336573/datastream/OBJ/view