Theoretical modeling of experimental EELS data for free-standing and supported graphene
Само за регистроване кориснике
2017
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Firstly, we present a theoretical modeling of the experimental electron energy loss (EEL) spectra of free-standing films consisting of N graphene layers in a scanning transmission electron microscope (STEM) [1]. We treat the multi-layer graphene (MLG) as layered electron gas with in-plane polarizability modeled by a two-dimensional (2D), two-fluid hydrodynamic (HD) model [2] for the inter-band transitions of ʌ DQGı electrons of single-layer graphene (SLG), and find good agreement (as shown in Fig. 1) with the experimental EEL spectra [3] for N<10 graphene layers. Secondly, we present a theoretical modeling of the experimental EEL spectroscopy (EELS) data for monolayer graphene supported by Pt(111), Ru(0001), and Ni(111) substrates [4], as well as for high-quality graphene grown on peeled-off epitaxial Cu(111) foils [5]. To reproduce the experimental loss function, we use the same version of the HD model for graphene’s ʌ DQG ı HOHFWURQV in conjunction with an empirical Drude-Lorentz mod...el for metal substrate. Finally, we present an analytical modeling of the experimental EELS data for free-standing graphene obtained by STEM using an ab initio method and the 2D, two-fluid extended HD (eHD) model [6]. We use an optical approximation based on the conductivity of graphene given in the local, i.e., frequency-dependent form derived by these two methods and find very good agreement with the EEL spectra from three independent experiments [3,7,8], especially in the case of the eHD model
Извор:
Mini-workshop REST in Paris "Common problems and solutions in core and valence theoretical spectroscopies" : Abstract book, 2017, 6-6Издавач:
- Paris : Pierre and Marie Curie University
Напомена:
- Mini-workshop REST in Paris : December 7-8, Paris, 2017.
Колекције
Институција/група
VinčaTY - CONF AU - Radović, Ivan AU - Despoja, Vito AU - Mišković, Zoran L. PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/12703 AB - Firstly, we present a theoretical modeling of the experimental electron energy loss (EEL) spectra of free-standing films consisting of N graphene layers in a scanning transmission electron microscope (STEM) [1]. We treat the multi-layer graphene (MLG) as layered electron gas with in-plane polarizability modeled by a two-dimensional (2D), two-fluid hydrodynamic (HD) model [2] for the inter-band transitions of ʌ DQGı electrons of single-layer graphene (SLG), and find good agreement (as shown in Fig. 1) with the experimental EEL spectra [3] for N<10 graphene layers. Secondly, we present a theoretical modeling of the experimental EEL spectroscopy (EELS) data for monolayer graphene supported by Pt(111), Ru(0001), and Ni(111) substrates [4], as well as for high-quality graphene grown on peeled-off epitaxial Cu(111) foils [5]. To reproduce the experimental loss function, we use the same version of the HD model for graphene’s ʌ DQG ı HOHFWURQV in conjunction with an empirical Drude-Lorentz model for metal substrate. Finally, we present an analytical modeling of the experimental EELS data for free-standing graphene obtained by STEM using an ab initio method and the 2D, two-fluid extended HD (eHD) model [6]. We use an optical approximation based on the conductivity of graphene given in the local, i.e., frequency-dependent form derived by these two methods and find very good agreement with the EEL spectra from three independent experiments [3,7,8], especially in the case of the eHD model PB - Paris : Pierre and Marie Curie University C3 - Mini-workshop REST in Paris "Common problems and solutions in core and valence theoretical spectroscopies" : Abstract book T1 - Theoretical modeling of experimental EELS data for free-standing and supported graphene SP - 6 EP - 6 UR - https://hdl.handle.net/21.15107/rcub_vinar_12703 ER -
@conference{ author = "Radović, Ivan and Despoja, Vito and Mišković, Zoran L.", year = "2017", abstract = "Firstly, we present a theoretical modeling of the experimental electron energy loss (EEL) spectra of free-standing films consisting of N graphene layers in a scanning transmission electron microscope (STEM) [1]. We treat the multi-layer graphene (MLG) as layered electron gas with in-plane polarizability modeled by a two-dimensional (2D), two-fluid hydrodynamic (HD) model [2] for the inter-band transitions of ʌ DQGı electrons of single-layer graphene (SLG), and find good agreement (as shown in Fig. 1) with the experimental EEL spectra [3] for N<10 graphene layers. Secondly, we present a theoretical modeling of the experimental EEL spectroscopy (EELS) data for monolayer graphene supported by Pt(111), Ru(0001), and Ni(111) substrates [4], as well as for high-quality graphene grown on peeled-off epitaxial Cu(111) foils [5]. To reproduce the experimental loss function, we use the same version of the HD model for graphene’s ʌ DQG ı HOHFWURQV in conjunction with an empirical Drude-Lorentz model for metal substrate. Finally, we present an analytical modeling of the experimental EELS data for free-standing graphene obtained by STEM using an ab initio method and the 2D, two-fluid extended HD (eHD) model [6]. We use an optical approximation based on the conductivity of graphene given in the local, i.e., frequency-dependent form derived by these two methods and find very good agreement with the EEL spectra from three independent experiments [3,7,8], especially in the case of the eHD model", publisher = "Paris : Pierre and Marie Curie University", journal = "Mini-workshop REST in Paris "Common problems and solutions in core and valence theoretical spectroscopies" : Abstract book", title = "Theoretical modeling of experimental EELS data for free-standing and supported graphene", pages = "6-6", url = "https://hdl.handle.net/21.15107/rcub_vinar_12703" }
Radović, I., Despoja, V.,& Mišković, Z. L.. (2017). Theoretical modeling of experimental EELS data for free-standing and supported graphene. in Mini-workshop REST in Paris "Common problems and solutions in core and valence theoretical spectroscopies" : Abstract book Paris : Pierre and Marie Curie University., 6-6. https://hdl.handle.net/21.15107/rcub_vinar_12703
Radović I, Despoja V, Mišković ZL. Theoretical modeling of experimental EELS data for free-standing and supported graphene. in Mini-workshop REST in Paris "Common problems and solutions in core and valence theoretical spectroscopies" : Abstract book. 2017;:6-6. https://hdl.handle.net/21.15107/rcub_vinar_12703 .
Radović, Ivan, Despoja, Vito, Mišković, Zoran L., "Theoretical modeling of experimental EELS data for free-standing and supported graphene" in Mini-workshop REST in Paris "Common problems and solutions in core and valence theoretical spectroscopies" : Abstract book (2017):6-6, https://hdl.handle.net/21.15107/rcub_vinar_12703 .